NE05E&NE08E V300R003C10SPC500 Installation Guide PDF

NE05E&NE08E Mid-End Router
V300R003C10SPC500
Installation Guide
Issue 01
Date 2018-12-05
HUAWEI TECHNOLOGIES CO., LTD.

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Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. i

Installation Guide Contents
Contents
1 Equipment Installation Process.................................................................................................. 1

2 Installation Preparation................................................................................................................3
2.1 Requirements for Running Environment A and Installation Planning...........................................................................6
2.1.1 Equipment Room Environment Requirements............................................................................................................6
2.1.2 Layout of Equipment Room........................................................................................................................................ 6
2.1.3 Construction of the Equipment Room......................................................................................................................... 7
2.1.4 Cleanliness of the Equipment Room........................................................................................................................... 9
2.1.5 Temperature and Humidity........................................................................................................................................ 10
2.1.6 Corrosive Gas Control Requirements........................................................................................................................10
2.1.7 Electromagnetic Requirements.................................................................................................................................. 11
2.1.8 ESD Protection.......................................................................................................................................................... 12
2.1.9 surge protection and Grounding Requirements......................................................................................................... 12
2.1.10 Power Supply...........................................................................................................................................................14
2.1.11 Lighting in the Equipment Room............................................................................................................................ 17
2.1.12 Protection System.................................................................................................................................................... 17
2.2 Requirements for Running Environment B and Installation Planning......................................................................... 20
2.2.1 Requirements for Selecting a Site for Equipment..................................................................................................... 21
2.2.2 Dust Resistance and Water Resistance...................................................................................................................... 22
2.2.3 Corrosion Protection..................................................................................................................................................23
2.2.4 Principle for Heat Dissipation of a Network Cabinet................................................................................................23
2.2.5 Cooperation Between Air Ducts................................................................................................................................29
2.2.6 Cabling Space............................................................................................................................................................ 31
2.2.7 Power Supply for Equipment.................................................................................................................................... 31
2.2.8 General Requirements on surge protection and Grounding...................................................................................... 31
2.2.9 Grounding Without Dedicated Grounding Environment...........................................................................................32
2.2.10 Selection of the Network Cabinet............................................................................................................................34
2.3 Requirements for Running Environment C and Installation Planning......................................................................... 35
2.3.1 Selection of the Outdoor Cabinet.............................................................................................................................. 36
2.3.2 Standards of the Outdoor Cabinet............................................................................................................................. 37
2.4 Basic Installation Specifications...................................................................................................................................38
3 General Installation Guidelines............................................................................................... 42

3.1 Unpacking Inspection................................................................................................................................................... 43
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3.1.1 Unpacking the Chassis...............................................................................................................................................43

3.1.2 Unpacking Boards..................................................................................................................................................... 44
3.1.3 Requirements of Inspection....................................................................................................................................... 46
3.2 Installing chassis...........................................................................................................................................................46
3.3 Installing Boards...........................................................................................................................................................47
3.3.1 Inserting a Board....................................................................................................................................................... 47
3.3.2 Removing a Board..................................................................................................................................................... 48
3.3.3 Installing a Filler Panel..............................................................................................................................................49
3.4 Checking Tail Fiber Connection...................................................................................................................................50
3.5 Grounding Specifications............................................................................................................................................. 51
3.5.1 General Grounding Specifications.............................................................................................................................51
3.5.2 Grounding Specifications for the Building................................................................................................................51
3.5.3 Equipment Grounding Specifications........................................................................................................................52
3.5.4 Grounding Specifications for Office Power.............................................................................................................. 53
3.5.5 Grounding Specifications for Signal Cables............................................................................................................. 53
3.5.6 Specifications for Managing Ground Cables.............................................................................................................54
3.6 Engineering Labels....................................................................................................................................................... 54
3.6.1 Introduction to Labels................................................................................................................................................55
3.6.1.1 Material...................................................................................................................................................................55
3.6.1.2 Type and Shape.......................................................................................................................................................55
3.6.2 Information Carried on Labels.................................................................................................................................. 57
3.6.2.1 For Power Cables....................................................................................................................................................57
3.6.2.2 For Signal Cables....................................................................................................................................................57
3.6.2.3 Remarks.................................................................................................................................................................. 58
3.6.3 Filling Information on Labels....................................................................................................................................58
3.6.3.1 Printing Labels........................................................................................................................................................58
3.6.3.2 Writing Labels........................................................................................................................................................ 61
3.6.4 attaching Labels......................................................................................................................................................... 61
3.6.4.1 Attaching the Label to the Signal Cable................................................................................................................. 62
3.6.4.2 attaching the Label to the Power Cable.................................................................................................................. 63
3.6.5 Frequently Used Engineering Labels........................................................................................................................ 63
3.6.5.1 Engineering Labels for Power Cables.................................................................................................................... 63
3.6.5.2 Engineering Labels for External Cables of Alarm Box..........................................................................................65
3.6.5.3 Engineering Labels for Ethernet Cables................................................................................................................. 66
3.6.5.4 Engineering Labels of the Fibers Between Two Devices.......................................................................................67
3.6.5.5 Labels for the Fiber that Connects the Device and the ODF..................................................................................68
3.6.5.6 Engineering Labels for Trunk Cables ....................................................................................................................69
3.7 The Requirements of Cabling and Bundling................................................................................................................ 72
3.7.1 The Requirements of Cabling....................................................................................................................................72
3.7.2 The Requirements of Bundling..................................................................................................................................72
3.8 Binding Strap................................................................................................................................................................ 73
3.8.1 Binding Strap............................................................................................................................................................. 74
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3.8.1.1 Architecture............................................................................................................................................................ 74
3.8.1.2 Cutting.................................................................................................................................................................... 74
3.8.2 Bundling the Binding Strap....................................................................................................................................... 76
3.8.2.1 Procedures for Bundling the Binding Strap............................................................................................................76
3.8.2.2 Expected Result...................................................................................................................................................... 77
3.8.2.3 Precautions..............................................................................................................................................................77
3.9 Assembling and Testing the Cable Connector..............................................................................................................78
3.9.1 Assembling and Testing the E1 Coaxial Cable Connector........................................................................................78
3.9.1.1 Assembling the Straight BNC Male Connector with the Coaxial Cable................................................................78
3.9.1.2 Assembling the L9-M Male Connector with the Coaxial Cable............................................................................ 83
3.9.1.3 Assembling the Straight SMB Female Connector with the Coaxial Cable............................................................ 87
3.9.1.4 Testing Cable Connectivity.....................................................................................................................................91
3.9.2 Assembling the RJ45 connector with the Ethernet Cable and Testing the Connectivity.......................................... 93
3.9.2.1 Connection Relations of Network Cables.............................................................................................................. 93
3.9.2.2 Assembling the RJ45 connector with the Shielded Ethernet Cable....................................................................... 95
3.9.2.3 Assembling the RJ45 connector with the Non-Shielded Ethernet Cable ............................................................ 100
3.9.2.4 Checking the Assembled Cable Connector.......................................................................................................... 102
3.9.2.5 Testing Cable Connectivity...................................................................................................................................105
3.9.3 Assembling Power Cables....................................................................................................................................... 107
3.9.3.1 Assembling OT Terminals and Power Cables...................................................................................................... 107
3.9.3.2 Assembling Cord End Terminals and Power Cables............................................................................................ 110
Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. iv

Installation Guide 1 Equipment Installation Process
1 Equipment Installation Process
This section describes the general equipment installation process. Before installing
equipment, you need to determine the installation mode according to installation environment.
After unpacking and inspecting the equipment, you need to install the chassis, boards, fibers,
and cables in sequence, and then check the installation result. After determining that the
installation is correct, you can power on the equipment and then check fiber connections.
Table 1-1 lists the general installation process.
Table 1-1 Equipment installation process

Installation Process Description
Before installation, plan installation space, build

telecommunications rooms, and determine the installation
mode according to requirements of the equipment for
Installation preparation running environment. This ensures that the equipment can be
properly installed and commissioned, and then can run
stably. For details on the requirements of the equipment for
running environment, see 2 Installation Preparation.
When a project starts, the project supervisor needs to work

Unpacking and inspecting
with the customer to unpack and inspect the delivered
equipment
equipment. For details, see 3.1 Unpacking Inspection.
The installation modes for chassis vary with installation

Installing chassis
environment. For details, see 3.2 Installing chassis.
Generally, chassis for delivery have boards installed. If

Installing boards
boards are delivered separately, see 3.3 Installing Boards.
The installation modes for fibers and cables in chassis vary

Installing fibers and cables
with installation environment.
Testing E1 cable
After installing E1 cables, test the E1 cable connections.
connections
After hardware installation is complete, check the installation

Checking installation
to ensure that the equipment can run stably.
Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. 1

Installation Guide 1 Equipment Installation Process
Installation Process Description
Before powering on the equipment, check the external power

supply to ensure proper voltage and fuse capacity. After
Powering on the equipment
powering on the equipment, observe the indicators to
determine whether the equipment runs properly.
During installation of fiber jumpers, the fiber jumpers may

be incorrectly connected or attenuate much optical power. To
avoid impacts on services, check fiber jumper connections
Checking fiber connections
after the fiber jumpers are routed from optical interfaces to
the optical distribution frame (ODF). For details, see 3.4
Checking Tail Fiber Connection.

Installation Guide 2 Installation Preparation
2 Installation Preparation
About This Chapter
Before installation, plan installation space, build telecommunications rooms, and determine
the installation mode according to requirements of the equipment for running environment.
This ensures that the equipment can be properly installed and commissioned, and then can run
stably. The equipment can run in various environment, and the running environment can be
classified into three types, that is, running environment A, B, and C. This section describes
the three types of environment.
For the requirements for running environment, see NE device Product Description Technical
Specifications and Environmental Requirements.
In environment A, B, and C, installation modes are different. For details on how to choose
equipment installation modes and references, see Table 2-1.
Table 2-1 Running environment and installation modes
Running
Installatio
Environ Description Example Reference
n Mode
ment
For details on
the
The
installation
Indoor equipment
mode, see 2.1
environment is installed
Running Standard central Requiremen
where in a 19-inch
environm telecommunications room ts for
temperature and cabinet, an
ent A or communication shelter Running
humidity are N63E
Environmen
under control cabinet, or a
t A and
T63 cabinet.
Installation
Planning.
Running Indoor The For details on

environm environment Wall in the corridor equipment the
ent B where can be installation

Running
Installatio
n Mode
ment
Room where temperature

is not under control such
as an attic in a residential
building
temperature and Simple

humidity are telecommunications room,
telecommunications room mode, see 2.2
partially under
reconstructed from a Requiremen
control or
cottage, or ts for
without control,
telecommunications room Running
or common installed in
reconstructed from a Environmen
outdoor a standard
common residential t B and
environment network
building Installation
with a simple cabinet.
Planning for
shelter such as an (In such a details on the
awning, where telecommunications room, installation
humidity reaches air conditioners and mains mode.
100% are available, but sealing
occasionally conditions are poor.)
Public area inside a

residential building such
as a stairwell or cleaning
tool room
l Outdoor area
close to a For details on
pollution the
source The installation
l Environment equipment mode, see 2.3
Running close to a can be Requiremen
Outdoor or an attic in a
environm pollution installed in ts for
residential building
ent C source with a standard Running
only simple outdoor Environmen
shields such cabinet t C and
as awnings Installation
l Place on the Planning.
sea

Running
Installatio
n Mode
ment
NOTE
An area close to a
pollution source
refers to an area
where saline
water such as the
sea or a salina is
within 3.7 km
away from it,
where a heavy
pollution source For details on
such as a The
the
metallurgical equipment
plant, coal mine, installation
Area complying with can be
or thermal power mode, see 2.3
environment B but close to installed in
plant is within 3 Requiremen
the sea or a pollution an outdoor
km away from it, ts for
where a medium source cabinet with
Running
pollution source an air
Underground garage Environmen
such as a conditioner
chemical plant, a t C and
or heat
rubber plant, or Installation
exchanger
an electroplating Planning.
factory is within
2 km away from
it, or where a
light pollution
source such as a
food factory,
leather factory, or
heating boiler is
within 1 km away
from it.
2.1 Requirements for Running Environment A and Installation Planning

This section describes the requirements for running environment A (environment under full
control) and requirements for installation planning.
2.2 Requirements for Running Environment B and Installation Planning
This section describes the requirements for equipment location selection, dustproof and
waterproof, surge protection and grounding, heat dissipation, cooperation between air ducts,
power supply of equipment, cabling space, selection of network cabinets and outdoor
cabinets, and corrosion protection when equipment is installed in running environment B.
2.3 Requirements for Running Environment C and Installation Planning
In environment C, you need to install equipment in an outdoor cabinet with an air conditioner
or heat exchanger.
2.4 Basic Installation Specifications
A correct installation mode is the prerequisite for ensuring that the ONU works normally.

2.1 Requirements for Running Environment A and

Installation Planning
This section describes the requirements for running environment A (environment under full
control) and requirements for installation planning.
2.1.1 Equipment Room Environment Requirements

The equipment room where the NE equipment is installed must be able to provide an
equipment operating environment that meets the ETSI EN 300 019-1-3 class3.2 standard at
least.
The engineering design in terms of construction, structure, heating, ventilation, power supply,
lighting and fire fighting should comply with the environment requirements for optical
synchronous transmission equipment. It should also comply with the international standards
and specifications related to industrial enterprise, environment protection, fire fighting, and
human protection, as well as the regulations and requirements for constructing and designing
buildings.
Site requirements are as follows:
l The altitude should be within the range of -60 m to 4000 m.
l The site should be kept away from (heavy, moderate, and light) pollution sources. If
these pollution sources cannot be avoided, select a site in the perennial upwind direction.
Use a high-quality equipment room or take high-level protective measures.
l The ventilation port for air exchange of the equipment room must be kept away from
sources of corrosive gas pollution. The equipment room should be kept in the positive
pressure state lest the corrosive gases enter the equipment room and erode components
and circuit boards.
l The equipment room should be kept away from heat sources. If this is unavoidable, using
a heat exchange cabinet or air conditioning cabinet is recommended.
l The equipment room should be located as high as possible. In general, it must be located
at least 600 mm above the maximum flood level in the local record.
l The historical livestock room or the chemical fertilizer warehouse cannot be used as the
equipment room.
l The equipment room should be solid enough to withstand wind and downpour.
l The equipment room should be kept away from the road or sand field with dusts flying
around. If this requirement cannot be satisfied, the windows and doors of the equipment
room should be kept away from the sources of pollution.
l The equipment room should not be placed near any water source. If this cannot be
avoided, the equipment room must be closed, with an air conditioning system installed.
2.1.2 Layout of Equipment Room

This section describes the principles of the overall layout of the equipment room.
The communication equipment room houses a complete set of communication transmission
equipment, for example, SPC switching equipment, power supply, and so on. They should be
arranged compactly for ease of maintenance and management. Figure 2-1 shows a typical
layout of the equipment room.

Figure 2-1 Layout of the equipment room
Service Console Control Room Diesel Room
Main
SPC Power
Distribution
Switching Distribution Battery Room
Frame
Room Room
(MDF) room
Transmission Room Transformer Room
Power line
Communication line
Network line
The principles for layout of the equipment room are as follows:

l Meet the requirements for wiring and maintaining the communication cable and power
cable.
l Avoid line roundabout for convenient maintenance, thus lowering the cable cost,
reducing communication failures and improving the work efficiency.
l Install the transmission equipment in a separate room close to the MDF room, or near the
switch.
2.1.3 Construction of the Equipment Room

This topic describes the requirements for the construction of the equipment room.
The construction of the equipment room shall meet the requirements listed in Table 2-2.
Table 2-2 Construction requirements for the equipment room

Item Requirements
Area The equipment room should be able to house all the devices of the
terminal office at least.
Net height Minimum indoor height refers to the net height under the roof beam or
under the ventilation pipe. Normally it is no less than 3 m.

Item Requirements
Indoor floor The floor of the equipment room should be semi-conductive and not
dust-arousing. Generally, ESD raised floor is required. The floor boards
should be laid tightly and firmly. For each square meter of floor space,
the horizontal tolerance should not be greater than 2 mm. If no raised
floor is available, electrostatic conductive floor material with a volume
resistivity ranging 1.0x107 ohms·cm - 1.0x1010 ohms·cm should be
laid. The electrostatic conductive floor material or the ESD raised floor
should be grounded well. It can be connected to the grounding device
through a current limiting resistor and a connection wire. Resistance of
the current limiting resistor should be 1 megaohm.
NOTICE
If thermal insulation cotton is required under the support for the floor, or an ESD
raised floor is required, do not use the thermal insulation cotton and the ESD
raised floor containing sulfur to prevent devices from being corroded.
Load-bearing >450 kg/m2

capacity of floor
Doors and Doors are single-leaf, 2 m high and 1 m wide. All doors and windows
windows should be sealed with dust-proof rubber strips. Double-layer glass is
recommended for windows.
Wall The wall can be covered with wallpaper or lusterless paint, but not the
paint that is apt to get pulverized or peeled.
NOTICE
If organic materials such as soundproof cotton are required, use materials that do
not contain sulfur.
Indoor ducts Indoor ducts are used for cabling. The inside of the ducts should be
smooth and clean. The reserved length and width (margins) as well as
the number, position and size of the holes should comply with the
relevant requirements for placing the optical synchronous transmission
equipment.
Water supply The service pipes, drain pipes and rain pipes should not pass through
and drainage the equipment room. Fire hydrants should not be placed in the
equipment room, but in corridors or the place near the staircase where
they can be easily seen and accessed to.
Waterproof The equipment should be kept away from indoor places with water
requirement sources, such as the air conditioner external units, water pipes, and
ducts.
Internal partition The place where the equipment is installed is separated from the
wall equipment room door. The partition wall can hold back some dusts, as
be shown in Figure 2-2.
Installation The air conditioner should be installed in the place where the
position of the discharged air from the air conditioner shall not be directed to the
air conditioner equipment. The air conditioner must be away from a window to prevent
the air conditioner blowing moisture on the window to devices in the
equipment room when the window is not securely closed.

Item Requirements
Other In addition to the rodent-proof measures (for example, measures

requirements against mice), measures against proliferation of fungi and mildew
should be taken in the equipment room.
When there is high humidity such as on rainy days, do not open the
door of the equipment room to prevent moisture increase that may be
condensed into water on cold surfaces of the devices in the equipment
room.
Storage batteries must be placed separately from devices in the
equipment room.
In the equipment room, do not use organic materials such as thermal
insulation cotton that contains sulfur or chlorine and rubber gaskets.
PEF thermal insulation cotton can be used as a thermal insulation
material.
Figure 2-2 Internal partition wall of the equipment room
Air conditioner
Equipment
Partition wall
2.1.4 Cleanliness of the Equipment Room

This section describes the requirements for the cleanness of the equipment room.
Dust on the equipment may lead to electrostatic adherence, and consequently result in poor
connection between metal connectors or connecting points. This will reduce the service life of
the equipment, and even makes it faulty.
To ensure long-term and reliable equipment operating, reduce dust particles in the equipment
room.
Table 2-3 shows the specifications for the density and diameter of dust particles in the
equipment room.

Table 2-3 Mechanical active substance

Mechanical Active Substance Content
Suspended dust ≤ 0.4 mg/m3
Deposited dust ≤ 15 mg/(m2·h)
Gravel ≤ 300 mg/m3
The equipment room shall be guarded against dust and corrosion by harmful gases such as
SO2, H2S, NH3, NO2, and CL2. 2.1.6 Corrosive Gas Control Requirements shows the limits
for them.
To meet the above requirements, take the following measures:
l Keep the equipment room far away from pollution sources and do not smoke in the
equipment room.
l Seal the doors and windows.
l Use dustproof materials for the floor, walls, and roof.
l Install screen doors and screen windows. Ensure that the outer windows are dustproof.
l Clean the equipment room and air filter regularly.
l Always wear clean lab coat and protective footwear before getting into the equipment
room.
l Cover the ceiling and walls of the equipment room with wallpapers or lusterless paint
(pulverized paint prohibited) to prevent dust flake-off.
2.1.5 Temperature and Humidity

This section describes the requirements for the relative humidity and ambient temperature in
the equipment room.
Proper temperature and humidity should be maintained inside the equipment room for the
transmission equipment to work well constantly, as shown in NE device Product Description
Technical Specifications and Environmental Requirements.
Too high or low temperature or humidity will do harm to the transmission quality and service
life of the equipment. Too high relative humidity in the equipment room for a long period will
greatly jeopardize the equipment. It will cause poor insulation or even electrical leakage in
certain insulation materials. Sometimes, it can cause changes in the mechanical performance
of such materials. Moreover, the metal parts of the equipment are prone to rusting. But when
the relative humidity is too low, the captive screws will become loose as the insulation washer
may get dry and shrink. Meanwhile the static electricity generated in the dry climate may
damage the circuits of the equipment. Too high indoor temperature will greatly reduce the
reliability of the equipment. If the equipment runs in such a high temperature environment for
a long period, its life will be shortened because the over high temperature will accelerate
aging of the insulation materials.
2.1.6 Corrosive Gas Control Requirements

This topic describes the requirements for the corrosive gases in the equipment room.

Besides dust-proof efforts, measures should be taken to prevent the equipment room from
being corroded by harmful gases, for example, SO2, H2S, NH3 and so on. Table 2-4 shows the
content limit on corrosive gases.
Table 2-4 Corrosive gas content specification

Item Unit Monthly Average
Content
SO2 mg/m3 ≤ 0.30
H2S mg/m3 ≤ 0.10
NH3 mg/m3 ≤ 1.0
Cl2 mg/m3 ≤ 0.10
N02 mg/m3 ≤ 0.50
HF mg/m3 ≤ 0.01
O3 mg/m3 ≤ 0.05
To fulfill the above requirements, take the following measures for the equipment room:
l Build the equipment room away from places with high-density corrosive gases.
l The air intake of the equipment room should be at the opposite side to the pollution
source.
l Do not use sulfur-containing organic materials to decorate the equipment room. These
materials include ESD pads, thermal insulation cotton, and soundproof cotton that are
made up from sulfur-containing rubber.
l Do not store diesels or gasoline engines in the equipment room where devices are placed.
When an oil-fired engine is outside the equipment room, ensure that the exhaust of the
engine is in the downstream direction of the equipment room and the engine is far away
from the air intake vent of the air conditioner for the equipment room.
l Place storage batteries isolated from one another. You are suggested to put one battery in
a room.
l Make an agreement with a professional monitoring company to monitor the environment
regularly.
2.1.7 Electromagnetic Requirements

This section describes the electromagnetic conditions and the measures for suppressing
electromagnetic interferences.
The electromagnetic requirements are showed in Table 2-5.

Table 2-5 Electromagnetic specification
Item Parameter
Amplitude modulation Frequency(MHz) 80 to 2700

radiated electromagnetic
fields Ampl. V/m(rms) 3
Equipment or the equipment room should be kept away from strong electromagnetic
interference sources. If this requirement is not met, take additional radiation protection
measures. For example, place the equipment in a radiation-resistant network cabinet or a
sealed cabinet.
2.1.8 ESD Protection

This section describes the requirements for the ESD prevention and the preventive measures
for the equipment room.
The absolute static voltage value should be less than 2000 V.
To fulfill this requirement, take the following measures:
l Train the operators on ESD prevention.

l Control the humidity in the room to reduce the impact from static electricity.
l Lay ESD floor in the room.
l Wear ESD shoes and uniforms before entering the room.
l Use ESD tools such as ESD wrist straps, ESD tweezers and extraction tools when
dealing with the equipment.
l Ground all conducting materials in the room, including computer terminals.
l Use ESD worktables.
l Keep non-ESD materials (such as common bags, foams, and rubbers) at least 30 cm
away from boards and ESD-sensitive components.
2.1.9 surge protection and Grounding Requirements

This section describes the requirements for surge protection and grounding.
Table 2-6 shows the requirements for surge protection and grounding.
Table 2-6 Requirements for surge protection and grounding
Item Description
On structure of Build the equipment room with steel and concrete. The equipment room
the equipment should be equipped with facilities such as surge protector to protect it
room against direct lightning strokes. Make sure the surge protection
grounding of the equipment room, or that of devices such as the surge
protector, shares the same grounding body with the protection
grounding of the building where the room is located in.

Item Description
Use TN-S for Equip the communication office with special electric transformers and
AC power metal-jacketed or insulation-jacketed power cable. The power cable is to
supply pass through a steel pipe and buried in the earth before entering the
office. Both ends of both the metal jacket and the steel pipe should be
grounded by proximate. Make sure the buried length is no less than 15
meters. Each of the three live cables at the low-voltage side of the AC
transformer should be equipped with a gapless zinc oxide arrester
respectively. The chassis, the AC neutral cable of the low-voltage side,
and the metal jacket of the cable connected to the chassis should all
proximately grounded.
Equip the Do not lead in or lead out the AC/DC power cables aerially for the
incoming power office. Equip the in-room low-voltage power cable with a surge
cable with a protector in the voltage regulator or in the AC panel. The arrester should
surge protector be grounded proximately. If the office is located in the city, it is
recommended to use an arrester with the nominal discharge current no
less than 20 kA. If it is located in the suburb of intermedial lightning
danger level or higher, an arrester with the surge current higher than 60
kA is recommended. If located in an isolated huge building in the city or
in the mountain area where lightning strokes occur often, please use an
arrester that has a surge current more than 100 kA. The ground cable
should be less than 1 meter in length.
DC power The working ground of the office, that is, the anode of a -48 V DC
supply power supply or the cathode of a 24 V power supply, should be led from
grounding the in-door grounding bus line by proximate. The ground cable should
satisfy the maximum load of the equipment. The power supply facilities
for the office are to possess a DC working neutral line, which is
introduced from the general grounding bus line or the protection ground
bar of the equipment room.
Equipotent All communication equipment and auxiliary equipment in the room

connection such as the mobile base station and the transmitting, exchanging, power
and distribution frame should be connected to the protection ground.
The protection grounding of all equipment in the communication office
should share a same general ground bar, while that of the same
equipment room all connect to the same protection ground bar. The
working ground and protection ground of the communication equipment
in the equipment room should adopt the joint grounding mode, that is,
they share a same grounding network. Protection grounding efforts
should also be done to the indoor cable tray, equipment chassis, metal
ventilation pipe, metal door or window.
General The AC neutral line cannot be connected to the protection ground of any
requirements on communication equipment. Make sure there is no fuse, switch or other
grounding devices of the like on a grounding line. All grounding lines should be as
short and straightforward as possible. Make all efforts to avoid winding
of them.

Item Description
On the < 10 ohms. The upper end of the grounding body should be 0.7 meters
grounding or more underground. In cold areas, the grounding body should be
resistor buried in the frozen layer or lower. Make regular monitor efforts on the
grounding resistor to make sure the grounding is always valid.
On routing of Signal cables should be led into the communication office from
the signal cable underground. Aerial routing of signal cables is forbidden. The leadin or
leadout communication cable should be metal-jacketed. Otherwise, they
should be routed in metal pipes. The ground cable of the arrester should
be as short as possible. The empty pairs in the cable should be
connected to the protection ground in the equipment room.
Lightning-proof When the equipment is installed in an outdoor cabinet, the cables

requirements of connected to the equipment may be exposed outdoors. If the length of
outdoor cables the exposed cables exceeds 5 m, a signal lightning protector must be
installed on the equipment.
On the The general grounding bus line can be grounding loop or bar. The
grounding bus ground cable should be not of aluminum material. If interconnection
line occurs between different metal connectors, take measures to avoid by
electric chemical corrosion. Generally, the cross-sectional area is a
copper bar of no less than 120 mm2 or zinc-plated flat steel of the same
resistance. The grounding bus line should be kept insulated from the
construction steel.
On the The grounding lead-in should be no longer than 30 meter. As for the
grounding lead- material, it is recommended to use zinc plated flat steel with the cross-
in wire sectional area being 40 mm x 4 mm or 50 mm x 5 mm.
2.1.10 Power Supply

This section describes the DC power supply system.
The working power voltage for the equipment ranges from -38.4 V to -72 V. The transmission
equipment offers a transmission path for communication networks, so its interruption will
have a wide influence. Therefore, the DC power distribution system should be protected
against power failure and configured with storage batteries. To deal with a long-term power
outage, a diesel generator should be equipped as the standby AC power supply for the
backbone transmission equipment. The DC power supply system consists of storage battery,
primary power supply (rectifier), DC distributor and control panel.
Storage battery
Storage battery is an essential component of the DC power distribution system of NE
equipment. Functionally, it serves to:
l Stabilize the voltage for the transmission equipment to work reliably.

l Store energy. In the case of outage of mains, the storage battery can feed power for a
period of time, which depends on its capacity, so that the communication will not be
interrupted immediately.

l Filter for large capacitors. The storage batteries are useful for absorbing surge voltage
from rectifiers and preventing noise and power frequency interference from getting into
the communication equipment.
l Automatically shut down. When the voltage of the storage battery drops to below -43.2
V, the control circuit can automatically shut down the output.
The storage battery of NE equipment is charged and discharges under a low, constant voltage.
Table 2-7 shows the relevant requirements:
Table 2-7 DC charge/discharge status and voltage requirements

Power Mains Battery DC Voltage Terminal The
Supply Supply Charge / Value Voltage of Number of
Category Status Discharge Each Storage
Storage Batteries in
Battery Each
Group
DC -48 V Normal Floating Floating charge 2.23 V 24 PCS

charged by voltage reaches
the rectifier 53.5 V.
Outage Discharge Discharge 1.8 V

voltage reaches
43.2 V.
Resumed Under When the 2.35 V

loading charging voltage
conditions, reaches 56.4 V, it
automaticall automatically
y charged changes to
with a constant voltage
current 0.1 mode, that is
to 0.15 changes the
times of the charging status to
battery floating charge.
capacity.
Primary power supply (rectifier)

l Primary power supplies shall be able to operate in parallel, and there should be current
equalizing device between them.
l The primary power supplies should be equipped with a current limiting device.
l The output voltage of the primary power supply should meet the requirement for initial
charging of storage batteries, that is 2.35 x 24= 56.4 V DC (when the power supply is
-48 V DC)
l A DC voltmeter and an ammeter should be installed for the primary power supplies.
l The efficiency of the primary power supply should be more than 85% and its power
factor more than 0.8.
l Natural cooling is recommended for the primary power supply. The primary power
supply should be able to work continuously with full load within 0°C-40°C.

l The output noise voltage (measured with a psophometer, plus weighing factors) of the
primary power supply should meet the requirements shown in Table 2-8.
l The primary power supply should be able to automatically shut down the output at a low
voltage.
Table 2-8 DC voltage specifications

Item DC Power Supply for Transmission Equipment
Nominal value (V) -48
Voltage fluctuation range (V) -38.4 to-57.6
Noise 0 Hz-300Hz ≤ 400 mV (peak value)

voltage
300 Hz -3400Hz ≤ 2 mV (weighted noise of psophometer)
3.4 kHz-150 Single frequency: ≤ 5mV effective Broadband: ≤

kHz value 100 mV effective
value
150 kHz-200 Single frequency: ≤ 3 mV effective Broadband: ≤ 30

kHz value mV effective
value
200 kHz-500 Single frequency: ≤ 2 mV effective
kHz value
500 kHz -30 Single frequency: ≤ 1 mV effective

MHz value
DC distributor and control panel

l The capacity of the primary power supply should be designed according to the power
consumption of the transmission equipment of the terminal office, and a certain margin
should be reserved. Generally, high frequency switching power supplies with a high
switching efficiency should be adopted, which should work in N+1 hot standby mode.
There should be an output current equalizer for each power module. The failure of a
single power module will not affect the normal operation of the whole DC power
distribution system.
l Each control panel can access a minimum of two groups of storage batteries. When one
of them fails, the other can supply power instead.
l Each control panel can access a minimum of 5 primary power supplies.
l The power supply equipment should be capable of automation, so as to satisfy the non-
attendant requirement.
l When the primary power supply charges the storage batteries in floating charge mode,
the number of primary power supplies put into operation depends on the load. When one
primary power supply becomes faulty, it will drop out automatically, while the standby
primary power supply will automatically go into operation.
l In the case of mains outage, storage batteries will discharge. When the mains resumes, it
will automatically recharge the discharged storage batteries with a current 0.1 to 0.15
times of the battery capacity. When the charging voltage reaches 56.4 V, it will
automatically change to constant-voltage charging.

l When the storage batteries are fully charged, they will automatically change to floating
charge.
NE equipment also has critical restriction on random transient noises, which include the
abnormal operation noise of the equipment caused by external magnetic interference and the
interference from the equipment itself and the ground cables. The shorter the duration of the
transient pulse, the larger values of such transient noises can be allowed. For the allowable
values, see Figure 2-3.
Figure 2-3 Transient noises

V
1000V
100V
10V
1V
0.1V T
0.1 m s 1 ms 1 0 ms 100 m s 1 000 m s
l When the power supply equipment fails or works abnormally, visual and audible alarms
should be given. Such alarm information should be sent to the operation and
maintenance center.
l In case short circuit occurs in a tributary of the power supply system, the whole power
distribution system should not be affected by the sharp voltage reduction.
2.1.11 Lighting in the Equipment Room

The OptiX transmission equipment room is equipped with three lighting systems.
l Active lighting system, which is powered by mains supply.
l Backup lighting system, which is powered by backup power supply (diesel electric
generator) of the office.
l Emergency lighting system, which is powered by storage batteries when the mains
supply has been interrupted but the backup power supply has not yet started to supply
power.
2.1.12 Protection System

This section describes the requirements for the protection system.
ESD protection
The equipment-affecting electrostatic induction comes from the external electric field such as
outdoor high voltage transmission line or lightning. It also comes from the internal system
such as indoor environment, floor materials or equipment structure.

Static electricity may damage the chips on integrated circuit boards and cause faults in
software and electronic switch. Statistics shows that 60 percent of the damaged circuit boards
are caused by static electricity. It is essential to take effective ESD protection measures.
The following measures are recommended:
l Ground the equipment well. While laying the raised floor covered with semiconductive
materials, copper foil should be used for grounding at a number of points on the floor
(the copper foil should be placed between the concrete floor and the semiconductive
floor and should be connected to the ground cable).
l Take dust-proof measure. Dust may do great harm to NE equipment. Dusts or other
particles getting into the equipment room may cause poor connection between
connectors or metal connecting points. When the humidity in the room is high, dust can
cause electrical leakage. It is found in maintenance that the equipment failure is often
caused by accumulated dusts. Especially, when the humidity in the room is very low,
electrostatic adherence is likely to occur.
l Keep proper temperature and humidity. Too high humidity may make the metal
components rusty, while too low humidity may induce static electricity.
l Always wear an ESD wrist strap and lab coat when touching a circuit board to prevent
electrostatic damage to the equipment.
Interference prevention
With the development of technologies and social economy, more and more electromagnetic
signals are transmitted in the air. They may affect the communication quality by causing
cross-talk and stray noise, and even result in communication interruption. The
electromagnetic interference (EMI) sources include:
l The corona discharge of the electric transmission line

l The transformer
l Switches
l Waveform distortion of the power supply network caused during the operation of large
equipment
l Radio frequency (RF) interference
l Natural interference sources such as terrestrial magnetic field and external radiation
The interference, from either inside or outside the equipment or the application system, affects
the equipment through conductive modes such as capacitance coupling, inductance coupling,
electromagnetic wave radiation, common impedance (including grounding system) and cable
(power and signal cables). In terms of external relationships of the equipment, interference is
from the signal cable, power cable, grounding system and spatial electromagnetic wave.
Integrated circuits (ICs) have the interference resistance capability to a degree. However when
the external noises go beyond their anti-interference tolerance, corrupted signals and even
system malfunction will be caused. It is impossible to eliminate or shield all the interference
sources, but the following measures can be taken to suppress the interference signals:
l High frequency interference in the power supply network is generated when the primary
coil of the power supply transformer is coupled to the secondary coil through distributed
capacitors. To suppress such interference, we can use an appropriate transformer, and
install a low-pass filter at the inlet of the power supply cable.

l The interference of the transient voltage in the power supply network can be reduced by
inputting power directly from the primary transformer with a filter capacitor for NE
equipment.
l When NE equipment works in the 50 Hz mains power supply network with the above
interference, the surge voltage caused by the power supply network and the over-voltage
generated by lightening will be passed to the power supply of the optical synchronous
transmission equipment, which leads to computing errors of the processors. Therefore,
before directly using the mains supply, effective measures against interference from
power supply network should be taken.
l The key to eliminate the interference from the grounding system is to avoid loops among
various grounds, such as the signal ground (including analog and digital grounds),
BGND, PGND and shield ground, or loops formed by large distributed capacitors.
Otherwise, the common impedance interference from the grounding system may affect
the operation of the equipment. In buildings other than high-rises, the working ground of
NE equipment should be separated as far as possible from the ground for electricity
equipment and surge protection device.
l Prevent electromagnetic radiation interference from the surroundings to the equipment.
In some integrated communication buildings, if there is a high frequency transmitter
there, its influence on NE equipment should meet the relevant requirements. Independent
power supplies are recommended for them.
l EMI from the telecommunications line should be restrained. Influenced by high
frequency electromagnetic field (external interference), high longitudinal voltage will
occur in the core and sheath of the communication cable. Because of the asymmetry of
cores in the cables, the longitudinal voltage will generate a horizontal noise voltage at
the ends of the cores. When both ends of the cable sheath are grounded, the sheath will
function as a shield layer, greatly reducing the longitudinal voltage and reducing the
interference voltage. Other effective methods include: reduce the voltage or current of
the interference source; reduce the line length and the spacing of the conducting wires to
reduce the area of the affected loop; directly place the insulated conducting wires on the
grounded floor; use a special grounding feedback cable to avoid co-impedance; or twist
the signal cable and the feedback cable together to offset partial peripheral
electromagnetic interference, and so on.
Fire protection
For small equipment rooms, a certain number of portable fire extinguishers should be
equipped in each room for an initial fire control. In large equipment rooms, fire extinguishing
facilities should be equipped. An automatic fire alarm system should also be equipped in the
equipment room. All telecom buildings with fire alarm system should have fire emergency
lighting system and evacuation instruction marks at important places, paths and gateways.
Anti-earthquake demand
The designed anti-earthquake intensity of the telecom equipment room must be one degree
(Richter scale) higher than that for the common buildings. The equipment room building that
cannot meet the requirement should be reinforced. When installing NE equipment, the
following anti-earthquake measures should be taken.
l Use steel framework for the cabinet of the equipment. There are locking devices to fix
the boards in the cabinet.
l The cabinet is reinforced with guide rail on the top and supports at the bottom.

surge protection
Chimneys, antennas or other things that are over 15 m tall on the top of the equipment room
building should be designed according to the surge protection requirements for civil buildings.
Measures should be taken against direct flash and intrusion of lightning current. In the main
high-rise transmission building, protective measures should be taken to prevent side lightning
strokes, especially in frequent lightning areas. Therefore designers should take actual
conditions into consideration and take appropriate measures. For example, connect the metal
external window frame to the surge protection wire; along the height of the building, place the
surge protection metal bands at a definite spacing on the outside wall, and so on.
The main equipment-room building should be provided with the following surge protection
measures:
l The building should have surge protector nets or bands installed at the positions
susceptible to lightning strokes. Lightning prevention wires or lightning rods should be
installed on the top of chimneys and antennas that are protruding from the building. The
cross-sectional area of the grounding wire of the surge protection device should not be
smaller than 120 mm2, while the space between the wires not larger than 30 m.
l The earth resistance of the earthing/grounding system is recommended to be less than 10
ohms, and the equipment grounding should be in accordance with national and local
electrical codes as well.
l Outdoor cables and metal pipes should be grounded before entering the building, and the
outdoor overhead cables should be equipped with lightening protection devices at the
inlet of the building.
l It is suggested to use roof plates, beams and pillars made of reinforced concrete and the
reinforcement bar as the ground cables of lightening arresters.
In the past surge protection grounding of the building was separate from the grounding for
telecom system and power supply system, and a large distance was required between the
grounding objects. However, the distance requirement is not satisfied due to small space of
the building. In fact, they cannot be separated in most cases, so joint grounding system is
recommended for the lightening protection grounding of the building. The joint grounding
system shall connect the telecom BGND, PGND, surge protection grounding of the building,
and grounding of the power frequency AC power supply system. A high earth resistance of
the joint grounding system is required. The earth resistance required by telecommunication is
far lower than 10 ohms, and the grounding requirements for different telecom devices vary, so
the resistance of the joint grounding system should be determined according to the minimum
resistance required for the grounding device.
It is recommended to use steel bars in the walls and pillars of the building as ground cables
for lightening protection. These wires should be electrically connected so as to equalize the
electric potential in the building.
2.2 Requirements for Running Environment B and

This section describes the requirements for equipment location selection, dustproof and
waterproof, surge protection and grounding, heat dissipation, cooperation between air ducts,
power supply of equipment, cabling space, selection of network cabinets and outdoor
cabinets, and corrosion protection when equipment is installed in running environment B.

2.2.1 Requirements for Selecting a Site for Equipment

To ensure that equipment operates stably over a long term, the site of equipment in
environment of class B must satisfy requirements with respect to communication network
design, communication technologies, hydrographic, geology, and transportation.
When selecting a site for equipment, make sure that the site satisfies the following
requirements:
l Equipment is kept as far as possible from the presence of harmful gases, dust, noise, and
excessive vibration. To achieve this level of protection, ensure that the equipment is
installed in a fully sealed enclosure or cabinet.
l Equipment is kept away from strong electromagnetic interference sources to ensure that
its electric field strength is less than 3 V/m, and the power frequency magnetic field is
below 3 A/m. For sites that cannot avoid strong interference, it is recommended that you
use the shielded chassis or cabinet to ensure that the equipment works properly. If used
in an electrical power substation or a similar environment, ensure that the
electromagnetic environment of the equipment meets power industry standards.
l Equipment is kept away from a tree or other plants. Otherwise, insects may be absorbed
by fans, resulting in damage to fans.
l Equipment is installed at least 500 m away from the seashore. If the network cabinet or
outdoor cabinet is configured with fans, ensure that the air intake vents do not face the
direction in which the sea wind blows.
l In an area prone to snow or rain, the vents of the network cabinet or outdoor cabinet are
at least one meter higher than the position with accumulated water or snow.
l Equipment is installed in a position away from water drips (outdoor part of an air
conditioner and dripping eave).
l The AC power system feeds power stably and no other devices with high power
consumption are operating. The rated voltage of the AC power system is 220 V and the
voltage on the power grid fluctuates within ±10%. After equipment is installed, the
voltage between L and N is 220 V, the voltage between L and PE is lower than 220 V,
and the voltage between N and PE is lower than 5 V. Otherwise, electrical leakage may
occur on the equipment and the user may fall victim to electric shock.
l Equipment does not face directly to windows of residential buildings. A network cabinet
is at least 5 m away from windows and an outdoor cabinet is at least 10 m away from
windows.
l Equipment is not directly exposed to rainwater or near windows or doors through which
rain water may enter.
l Equipment doors do not face residents or stand parallel with residents.
l When equipment is installed on a wall, the equipment is at least one meter above the
ground. This distance keeps equipment beyond the reach of residents.
l The air intake vents on equipment are far away fromsources of corrosive gas pollution.
Equipment is under positive pressure, which helps block aggressive gas. Aggressive gas
may erode electronic components or PCBs.
l When installed in a basement, a network cabinet should be installed in a place unable to
be flooded. In this scenario, the municipal drainage system of the building needs to be
taken into consideration.
l If the first floor of the building is low-lying, do not install the equipment in the weak-
current well on the first floor or ground-mount the equipment in the corridor.

l Do not lead the cables or optical cables on the top of the network cabinet and then
downwards into the network cabinet from the side or top. In addition, take water-proof
measures for all cables led into the network cabinet so that rainwater will not enter the
network cabinet along the cables.
l Cabinets have special protective equipment, such as rat guards. Ensure that these
facilities have been installed.
l Cabinets have access control and environmental monitoring equipment. Ensure that these
facilities have been installed and used.
l A filler panel is installed in each empty slot.
l Natural cooling equipment has enough space for heat dissipation.
l To prevent the air duct from being blocked, do not place any object around the air intake
or exhaust vent.
2.2.2 Dust Resistance and Water Resistance

The protection rating of the equipment is IP20. A network cabinet installed outdoors or in a
corridor that is exposed to rain must meet the requirements of IP55 rating protection at least.
A network cabinet installed indoors or in a corridor that is free from rain must meet the
requirements of IP31 rating protection at least.
Dustproof and Waterproof Capability of the Device

The protection rating of the equipment is IP20. (The first number "2" indicates that the
equipment can prevent a solid foreign object with the diameter larger than 5 mm from
entering the equipment. The second number "0" indicates that the waterproof function is not
provided.)
Install the device in a place that is free from flooding and prevent foreign objects such as
screw and cable end from entering the heat-dissipation hole of the device. Otherwise, the
device may be burnt due to short circuit.
Outdoor Dustproof and Waterproof Requirement

If the network cabinet is installed outdoors or in a corridor that is exposed to rain, the network
cabinet must meet the requirements of IP55 rating protection at least. ("IP" indicates
International Protection Rating. The first number "5" refers to the rating for preventing the
solid particle from entering the network cabinet. That is, ingress of dust is not totally
prevented, but dust shall not penetrate in a quantity to interfere with satisfactory operation of
apparatus or to impair safety. The second number "5" refers to the rating for preventing water
from entering the network cabinet. That is, water projected in jets against the enclosure from
any direction shall have no harmful effects.)
In regions with heavy dust, it is recommended that customers add air filters to their
customized network cabinets to improve the reliability of the network cabinet.
Indoor Dustproof and Waterproof Requirement

If the network cabinet is installed indoors or in a corridor that is free from rain, the network
cabinet must meet the requirements of IP31 rating protection at least. (The first number "3"
indicates that the network cabinet can prevent a solid object with the diameter equal to or
larger than 2.5 mm from entering the network cabinet. The second number "1" indicates that
vertically falling drops shall have no harmful effects.)

2.2.3 Corrosion Protection

To ensure normal running of the equipment installed in environment B, concentration of
corrosive gas must satisfy relevant requirements.
Table 2-9 lists requirements for concentration of corrosive gas in installation environment.
Table 2-9 Requirements for concentration of corrosive gas
Chemical Active Unit Content

Substance
SO2 mg/m3 ≤ 0.30
H2S mg/m3 ≤ 0.10
NH3 mg/m3 ≤ 1.00
Cl2 mg/m3 ≤ 0.10
The equipment installation environment cannot be surrounded with pollution sources. If this
condition cannot be met, it is recommended that the equipment be installed in a heat exchange
cabinet or an air conditioning cabinet.
2.2.4 Principle for Heat Dissipation of a Network Cabinet

The NE equipment needs to be installed in a standard network cabinet that complies with heat
dissipation requirements of the NE equipment.
1. When the NE equipment is installed in a network cabinet, the temperature at the air
intake vent cannot exceed the maximum temperature permitted by the equipment to run
normally, and the network cabinet must be capable of dissipating the heat generated by
all the equipment installed in the network cabinet.
2. Fans need to have the backup function. After a fan fails, the other fans can still work
normally. A failed fan needs to be replaced in time. For more information about the air
volume of fans, see the air volume of an indoor cabinet.
3. The heat dissipation capability of a network cabinet without fans is greater than the
maximum total heat dissipation consumption of the equipment in the network cabinet,
and the internal temperature of the network cabinet is lower than the maximum working
temperature of the equipment.
Thermal Design of a Network Cabinet with Natural Heat Dissipation

When the equipment is installed in a network cabinet with natural heat dissipation, the air
duct direction of the equipment needs to be consistent with the air duct direction of the
network cabinet. The equipment can be installed horizontally or vertically.

Table 2-10 Requirements for a network cabinet with natural heat dissipation where the NE is
installed horizontally
Supported
Horizontal installation
installation mode
Sets of equipment that

can be housed in the 1 2
network cabinet
Dimensions (mm): H x NE05E: 200×580×500 NE05E: 400×580×500

WxD NE08E: 100×580×500 NE08E: 200×580×500
NE05E: Air exhaust vents are close to the top of the network
cabinet and air intake vents are close to the bottom of the
Positions of the air network cabinet.
vents on the network
cabinet NE08E: The air intake vent is located on the left panel of the
network cabinet and the air exhaust vent is located on the right
panel of the network cabinet.
Cross-sectional area of NE05E: 88 NE05E: 176

the air vents on the
network cabinet (cm2) NE08E: ≥230 NE08E: ≥460
Requirem NE05E: The distance between each side (left or right side) of the
ents for equipment and the corresponding side panel of the network
the cabinet is at least 40 mm.
position NE08E:
where the
NE l It is recommended that the air vents on the equipment face
equipment Requirem the air vents on the network box, and the distance between
is installed ents for the equipment and a side panel of the network box be at least
in the the width 20 mm. In this manner, the heat air can be directly exhausted.
network l If air vents are blocked, the blocked area of the air vents does
cabinet not exceed 10% of the total area of the air vents.
l After installation, the fans on the equipment are on the left.
When the fans are rotating, the air flows from left to right, in
the same direction as the air ducts of the network cabinet.

Supported
Horizontal installation
installation mode
NE05E:
NE05E:
l The bottom of the
equipment does not l The bottom of the equipment
block the air intake does not block the air intake
vents. vents.
l The top of the equipment l The top of the equipment is
is not higher than the not higher than the lowest
lowest row of air exhaust row of air exhaust vents.
vents. l The distance between two sets
l The distance between the of equipment is at least 90
top of the equipment and mm.
Requirem
the top panel of the l The distance between the top
ents for
network cabinet is at of the equipment and the top
the height
least 135 mm. panel of the network cabinet
NE08E: is at least 225 mm.
l The equipment needs to NE08E:
be stacked without any l The equipment needs to be
space. stacked without any space.
l The distance between the l The distance between the
equipment and the ODF equipment and the ODF or
or power supply on the power supply on the top or in
top or in the bottom of the bottom of the network
the network cabinet is at cabinet is at least 45 mm.
least 45 mm.
Table 2-11 Requirements for a network cabinet with natural heat dissipation where the NE is
installed vertically
Supported
Vertical installation
installation mode
Sets of equipment that

can be housed in the 1 2
network cabinet
Dimensions (mm): H x
580×100×500 580×200×500
WxD
Positions of the air

Air exhaust vents are close to the top of the network cabinet and
vents on the network
air intake vents are close to the bottom of the network cabinet.
cabinet
Cross-sectional area of NE05E: 40 NE05E: 80

network cabinet (cm2) NE08E: ≥230 NE08E: ≥460

Supported
installation mode
Requirem NE05E: The recommended NE05E:

ents for distance between each side l The recommended distance
the (left or right side) of the between each side (left or
position equipment and the right side) of the equipment
where the corresponding side panel of and the corresponding side
NE the network cabinet is at panel of the network cabinet
equipment least 10 mm. is at least 9 mm.
is installed
in the Requirem NE08E: l The distance between two sets
network ents for l The equipment needs to of equipment is at least 9 mm.
cabinet the width be stacked without any NE08E:
space. l The equipment needs to be
l The distance between the stacked without any space.
equipment and the ODF l The distance between the
or power supply on the equipment and the ODF or
top or at the bottom of power supply on the top or at
the network cabinet is at the bottom of the network
least 45 mm. cabinet is at least 45 mm.

Supported
installation mode
NE05E:
l The distance between the
air intake vent at the
NE05E:
bottom of the equipment
and the bottom of the l The distance between the
network cabinet is at bottom of the equipment and
least 45 mm. the bottom of the network
cabinet is at least 45 mm.
l The top of the equipment
is not higher than the l The top of the equipment is
lowest row of air exhaust not higher than the lowest
vents. row of air exhaust vents.
l The distance between the l The distance between two sets
air exhaust vent on the of equipment is at least 90
top of the equipment and mm.
the top panel of the l The distance between the top
network cabinet is at of the equipment and the top
least 45 mm. panel of the network cabinet
NE08E: is at least 70 mm.
Requirem l The directions of the air NE08E:
ents for intake vent and the air l The directions of the air
the height exhaust vent on two intake vent and the air
sides of the equipment exhaust vent on two sides of
need to be the same as the equipment need to be the
the vent directions of the same as the vent directions of
network cabinet. This the network cabinet. This
ensures that the heat air ensures that the heat air can
can be directly exhausted be directly exhausted out of
out of the network the network cabinet.
cabinet.
l If air vents are blocked, the
l If air vents are blocked, blocked area of the air vents
the blocked area of the does not exceed 10% of the
air vents does not exceed total area of the air vents.
10% of the total area of
l When the fans are rotating,
the air vents.
the air flows from bottom to
l When the fans are top, in the same direction as
rotating, the air flows the air ducts of the network
from bottom to top, in cabinet.
the same direction as the
air ducts of the network
cabinet.
Thermal Design of a Network Cabinet with Fan Cooling

Table 2-12 lists requirements for NE05E.

Table 2-12 Requirements for a network cabinet with fan cooling where the NE is installed
Sets of equipment 1 2 3
that can be housed
in the network
cabinet
Dimensions (mm): H x 200 x 580 x 500 400 x 580 x 500 600 x 580 x 500
WxD
Air volume of the ≥ 42 ≥ 84 ≥ 126

cabinet
Dimensions and One 9 cm fan or One 12 cm fan or One 15 cm fan or

number of fans two 8 cm fans two 9 cm fans two 12 cm fans
connected in connected in parallel connected in
parallel mode (Air mode (Air volume = parallel mode (Air
volume = Maximum air volume =
Maximum air volume of a single Maximum air
volume of a single fan x 0.5 x Number volume of a single
fan x 0.5 x of fans) fan x 0.5 x Number
Number of fans) of fans)
Fan positions The fans need to be arranged in the diagonal direction of the
entrance on the network cabinet.
Cross-sectional area of ≥ 81 ≥ 144 ≥ 225

network cabinet (cm2)
Requirem Requirem The distance between each side (left or right side) of the
ents for ents for equipment and the corresponding side panel of the network
the the width cabinet is at least 40 mm.
position If air vents are blocked, the blocked area of the air vents does
where the not exceed 10% of the total area of the air vents.
NE
equipment Requirem The equipment needs to be stacked without any space.
is installed ents for The distance between the equipment and the ODF or power
in the the height supply on the top or in the bottom of the network cabinet is at
network least 45 mm.
cabinet
Table 2-13 lists requirements for .
Table 2-13 Requirements for a network cabinet with fan cooling where the NE is installed
that can be housed
in the network
cabinet
Dimensions (mm): H x 100×580×500 200×580×500 300×580×500

WxD

that can be housed
in the network
cabinet
Air volume of the ≥150 ≥300 ≥450

cabinet
Dimensions and Two 9 cm fan or Two12 cm fan or Two 15 cm fan or

number of fans three 8 cm fans three 9 cm fans three 12 cm fans
connected in connected in parallel connected in
parallel mode (Air mode (Air volume = parallel mode (Air
volume = Maximum air volume =
Maximum air volume of a single Maximum air
volume of a single fan x 0.5 x Number volume of a single
fan x 0.5 x of fans) fan x 0.5 x Number
Number of fans) of fans)
Fan positions The fans need to be arranged in the diagonal direction of the
entrance on the network cabinet.
Cross-sectional area of ≥162 ≥288 ≥450

network cabinet (cm2)
Requirem Requirem The distance between each side (left or right side) of the
ents for ents for equipment and the corresponding side panel of the network
the the width cabinet is at least 60 mm.
position If air vents are blocked, the blocked area of the air vents does
where the not exceed 10% of the total area of the air vents.
NE
equipment Requirem The equipment needs to be stacked without any space.
is installed ents for The distance between the equipment and the ODF or power
in the the height supply on the top or in the bottom of the network cabinet is at
network least 45 mm.
cabinet
2.2.5 Cooperation Between Air Ducts

When selecting a network cabinet, make sure that the air ducts for the network cabinet match
those for equipment.
Recommended Air Ducts for Equipment

Figure 2-4 shows the recommended air ducts for equipment installed horizontally.
Figure 2-4 Recommended air ducts for equipment installed horizontally
Front
of
Device

Recommended Air Ducts for a Network Cabinet

In the case of a network cabinet with natural heat dissipation, make sure that air intake vents
are kept as far away from air exhaust vents as possible, to achieve a better chimney effect. Air
intake vents must be in the lower part of the network cabinet and close to the bottom panel;
air exhaust vents must be on the top panel of the network cabinet.
A network cabinet with natural heat dissipation enables air to flow in three typical modes, that
is, bottom in top out, bottom in side out, and side in side out, as shown in Figure 2-5.
Figure 2-5 Recommended air ducts for a network cabinet with natural heat dissipation
Bottom in side out Side in side out
In the case of a network cabinet with fan cooling, arrange air intake vents and fans properly so
that air flows evenly without forming an air reflow zone.
A network cabinet with fan cooling also enables air to flow in three typical modes, that is,
bottom in top out, bottom in side out, and side in side out, as shown in Figure 2-6.
Figure 2-6 Recommended air ducts for a network cabinet with fan cooling
Bottom in side out Side in side out
The fan tray assembly must match the design of vents on a network cabinet and generate
sufficient air volume.
A general rule to design vents is to determine the area of vents based on the size of the fan
tray assembly. This ensures a minimum of 30% of the maximum air volume generated by
fans.

For example, a fan tray assembly with dimensions of 120 mm x 120 mm x 25 mm generates
144 CFM air volume to the maximum. In this case, when the area of vents is 14400 mm 2 (40
mm x 360 mm or 120 mm x 120 mm), the system can obtain 57.6 CFM air volume at least.
2.2.6 Cabling Space

When installing the NE equipment in environment B, you need to consider the cabling space
in front of the equipment.
l When installing the NE equipment in a network cabinet, you need to follow the standard
of installing the equipment in a 19-inch cabinet. The cabling space in front of the
equipment must be no less than 75 mm.
l When installing the NE equipment in an outdoor cabinet, you also need to follow the
standard of installing the equipment in a 19-inch cabinet. The cabling space in front of
the equipment must be no less than 75 mm.
l When a network cabinet is installed on a wall, sufficient space must be left around the
cabinet.
– At least 800 mm space must be left in front of the network cabinet.
– At least 200 mm space must be left at the rear of the network cabinet.
– At least 200 mm space must be left on the top of the network cabinet.
– At least 300 mm space must be left below the network cabinet.
2.2.7 Power Supply for Equipment

The NE equipment supports DC power supply and AC power supply.
Requirements for Power Supply

For details, see NE device Product Description Technical Specifications and Environmental
Requirements.
2.2.8 General Requirements on surge protection and Grounding

Telecommunications devices have stricter requirements on surge protection and grounding
than other devices. Taking proper surge protection and grounding measures is the major
requirement to ensure that the device works normally.
When routing power cables or service cables connected to equipment to the outdoor area, do
not route them overhead.
1. Ground the equipment in compliance with national regulations, industry standards, and
carrier regulations.
NOTE
l When the device is installed inside the building, and the subscriber cable and power cable are
routed in the overhead cabling mode, install an elementary surge protection device on the input side
of the AC power system and ensure that the surge protection rating is not smaller than 5 kA (8/20
μs).

2. If the building has installation environment with a dedicated grounding system, use the
grounding system of the building directly to ground the device. Do not use the downlead
of the lightning belt or lightning rod of the building to ground the device.
3. If the building does not have installation environment with a dedicated grounding
system, it is recommended that you use the protective earthing (PE) of the AC power
distribution system of the building to ground the device.
4. If the building does not have any dedicated installation environment for grounding
devices or the PE of the AC power distribution system, construct a new grounding
system. It is recommended that you install the network cabinet on a lower floor of the
building to reduce the grounding cost.
5. Routing the aerial open wire into the network cabinet is prohibited. Use the cable with
metallic jacket and route the cable underground into the network cabinet.
6. After the power supply enters the network cabinet, use a surge protection bar.
7. Connect all devices and metal parts in the network cabinet to the ground bar in the
network cabinet in an equipotential manner. Connect the ground bar in the network
cabinet to the external ground device by using a ground cable.
2.2.9 Grounding Without Dedicated Grounding Environment

The equipment is generally installed in harsh environmental conditions. Even if in the
installation scenario without dedicated grounding environment, you also need to ground the
equipment properly if possible.
TN-C-S/TN-S AC Power System (N Wire and PE Wire Are Combined into One
Wire on the surge protection Bar or N Wire and PE Wire Are Provided
Separately)
It is recommended that you use the PE wire of the AC power cable to ground the equipment.
The prerequisite is that the PE wire of the AC power cable for the corridor of the building is
already grounded properly.
The PE wire of the AC power cable must be grounded. Otherwise, electrical leakage may
occur on the device and cause personnel injury.
Figure 2-7 shows the grounding connections of the TN-C-S AC power system.
Figure 2-7 Grounding connections of the TN-C-S AC power system

Figure 2-8 shows the grounding connections of the TN-S AC power system.
Figure 2-8 Grounding connections of the TN-S AC power system
Use a ground cable (the cross-sectional area of the ground cable must be at least 6 mm2) to
connect all devices in the network cabinet to the ground bar of the network cabinet. Connect
the ground bar to the network cabinet in an equipotential manner through a metallic structure.
Use a ground cable to connect the grounding point of the reinforcing rib of the optical fiber to
the ground bar. You can also connect this grounding point to the network cabinet in an
equipotential manner through a metallic structure.
connect the ground bar of the network cabinet to the PE wire of the corridor AC power
supply.
TT AC Power System (Provide Only L Line and N Line and Directly Ground the
Device)
It is recommended that an external ground device be adopted. For example, use the dedicated
ground device (such as the ground flat steel sheet, ground post, and ground bar) of the
building or the base concrete bar of the reinforcement concrete of the building, or deploy a
new earth screen.
Figure 2-9 shows the grounding connections of the TT AC power system.
Figure 2-9 Grounding connections of the TT AC power system
connect all devices in the network cabinet to the ground bar of the network cabinet. Connect
the ground bar to the network cabinet in an equipotential manner through a metallic structure.
Use the ground cable to connect the grounding point of the reinforcing rib of the optical fiber
to the ground bar. You can also connect this grounding point to the network cabinet in an
equipotential manner through a metallic structure.

connect the ground bar of the network cabinet to an external ground device.
NOTE
l In an installation environment with dedicated ground devices, the corridor ground device is
recommended for grounding.
l In an installation environment without dedicated ground devices, it is recommended that the base
concrete bar of the reinforcement concrete of the building be used or a new earth screen be deployed
for grounding.
2.2.10 Selection of the Network Cabinet

When selecting a network cabinet, mainly consider the factors such as capacity, parts
performance, protection performance, engineering installation performance, ventilation, and
heat dissipation. These factors help to select a reliable network cabinet at the initial stage of
network device deployment to ensure that the device runs reliably.
The network cabinet is generally installed in a basement or corridor. The network cabinet
needs to support the wall-installation mode and AC power distribution, and must be capable
of obtaining power from the power system inside the building. Its EMC and noise must
comply with standards. When an ONU is running, the network cabinet must ensure that the
noise is lower than 5 dB to avoid disturbing residents.
Space of the Network Cabinet

The space of the network cabinet in different configurations must meet the requirements of
terminal block layout and the space for routing FE network cables, power cables, E1 cables,
and optical fibers. For the requirements of the cable routing space, see 2.2.6 Cabling Space.
surge protection and Grounding of the Network Cabinet

l The electrical continuity between parts of the network cabinet must be satisfactory to
provide reliable grounding, safety, and protection performance. Ensure that the resistance
between any two connected points is less than 0.1 ohm. You can use a multimeter to
measure the resistance.
l For the AC-powered cabinet, it is recommended that you reserve a surge protection bar
and ensure that the surge protection rating is not smaller than 5 kA (8/20 μs).
l The network cabinet must provide a ground bar for grounding all devices in the cabinet
in a unified way. The resistance of the PGND cable must be smaller than 10 ohms.
Protection Performance of the Network Cabinet

The device is not waterproof. Therefore, when the device is installed indoors, install it in the
network cabinet that is free from splashing water.
Ensure that all cable apertures for external cables are sealed properly.
If the network cabinet is installed indoors or in a corridor that is free from rain, the network
cabinet must meet the requirements of IP31 rating protection. (The first number "3" indicates
that the network cabinet can prevent a solid particle with the diameter equal to or larger than
2.5 mm from entering the network cabinet. The second number "1" indicates that vertically
falling drops shall have no harmful effects.)

Test conditions/parameters of IP X1: drippage: 1 mm/minute; duration: 10 minutes.
Eligible adjudging criterion for protection:
l No water enters the cabinet.

l The water that enters the cabinet must be within the amount that may affect the normal
operation and safety performance of the cabinet. Water must not accumulate on the
insulating parts that may cause electrical leakage within the creepage distance. Water
must not enter the electrical parts or enter the winding (resistance) that cannot be used in
the damp state. No water accumulates around the cable head or enters the cable.
Engineering Installation of the Network Cabinet

The engineering installation performance of the network cabinet must meet the requirements
of installing the cabinet on a wall in the main indoor application scenarios of the network
cabinet, such as a basement or corridor.
l The network cabinet can be adaptively installed on different walls.

l When the wall is not flat, the network cabinet can be leveled so as to be installed reliably
(the recommended adjustable scope is 10 mm at least).
The space for routing power cables, optical fibers, and subscriber cables are planned properly
in the network cabinet. Various types of cables are routed separately and the cables do not
cross over each other. The positions of the MDF and the ODF are proper to ensure that the
cable length is proper after the device is installed.
Ventilation and Heat Dissipation Performance of the Network Cabinet

Requirements on the ventilation and heat dissipation performance of the network cabinet:
Obvious air intake vent and air exhaust vent are distributed in the air duct of the network
cabinet after the device is installed. Due to the difference between internal and external
network cabinet temperatures, the temperature of the air intake vent must be 10 °C lower than
the maximum ambient temperature of the NE device when it is operating. This ensures that
each board on the NE equipment satisfies requirements for heat dissipation.
2.3 Requirements for Running Environment C and

In environment C, you need to install equipment in an outdoor cabinet with an air conditioner
or heat exchanger.
When NE equipment is installed in an outdoor cabinet, do not install other type of equipment
in the cabinet. If other type of equipment and NE equipment have to be installed in the same
outdoor cabinet, make sure that the equipment satisfies requirements for heat dissipation and
anti-erosion.
When installed in environment C, the equipment needs to be installed in an outdoor cabinet

with an air conditioner or heat exchanger, which keeps the equipment fully isolated from the
outside environment. Environment C involves the following cases:
l Outdoor area close to a pollution source

l Environment with only simple shields such as awnings

l Place on the sea

NOTE
An area close to a pollution source refers to an area where saline water is within 3.7 km away from it, where a
heavy pollution source is within 3 km away from it, where a medium pollution source is within 2 km away
from it, or where a light pollution source is within 1 km away from it.
2.3.1 Selection of the Outdoor Cabinet

When selecting an outdoor cabinet, mainly consider the factors such as capacity, parts
performance, protection performance, engineering installation performance, ventilation, and
heat dissipation. These factors help to select a reliable outdoor cabinet at the initial stage of
network device deployment to ensure that the device runs reliably.
An outdoor cabinet is mainly installed in an outdoor area or an indoor area close to
contamination sources, such as an underground garage. Its EMC and noise must comply with
standards. When an ONU is running, the outdoor cabinet must ensure that the noise is lower
than 7 dB to avoid disturbing residents.
Space of the Outdoor Cabinet

The space of the outdoor cabinet in different configurations must meet the requirements of
terminal block layout and the space for routing FE network cables, power cables, E1 cables
and optical fibers. For the requirements of the cable routing space, see 2.2.6 Cabling Space.
surge protection and Grounding of the Outdoor Cabinet

l The electrical continuity between parts of the outdoor cabinet must be satisfactory to
provide reliable grounding, safety, and protection performance. Ensure that the resistance
between any two connected points is less than 0.1 ohm. You can use a multimeter to
measure the resistance.
l The AC power system must have an elementary surge protection device installed and the
surge protection rating must not be smaller than 20 kA (8/20 μs).
l The MDF must have protective units installed and the surge protection rating must not be
smaller than 1 kA (8/20 μs).
l The cabinet must provide an internal ground bar for grounding all devices in the cabinet
in a unified way. The resistance of the PGND cable must be smaller than 10 ohms.
Protection Performance of the Outdoor Cabinet

When installed outdoors, an outdoor cabinet with rainproof heat-dissipation hole and bottom
lead-out cabling mode is recommended.
customized outdoor cabinets to improve the reliability of the device.
Ensure that all cable apertures for external cables are sealed properly. Waterproof plugs must
be used when the device is installed in an outdoor cabinet.
If the cabinet is installed outdoors or in a corridor that is exposed to rain, the cabinet must
meet the requirements of IP55 rating protection. ("IP" indicates International Protection
Rating. The first number "5" refers to the rating for preventing the solid particle from entering
the cabinet. That is, ingress of dust is not totally prevented, but dust shall not penetrate in a
quantity to interfere with satisfactory operation of apparatus or to impair safety. The second
number "5" refers to the rating for preventing water from entering the cabinet. That is, water

projected in jets against the enclosure from any direction shall have no harmful effects.) For
details, refer to 2.3.2 Standards of the Outdoor Cabinet.
For example, test conditions/parameters of IP X5: flow: 12.5 L/minute±5%; distance: 2.5 -3
m; spray duration: 1 minute/m2, at least 3 minutes.
Eligible adjudging criterion for protection:
l No water enters the cabinet.

l The water that enters the cabinet must be within the amount that may affect the normal
operation and safety performance of the cabinet. Water must not accumulate on the
insulating parts that may cause electrical leakage within the creepage distance. Water
must not enter the electrical parts or enter the winding (resistance) that cannot be used in
the damp state. No water accumulates around the cable head or enters the cable.
Engineering Installation of the Outdoor Cabinet

The engineering installation performance of the outdoor cabinet must meet the requirements
of installing the cabinet on a wall in the main outdoor application scenarios of the outdoor
cabinet, such as an elevated platform.
l The outdoor cabinet can be adaptively installed on different elevated platforms.

l When installed on a concrete floor, the cabinet can be leveled so as to be installed
reliably (the recommended adjustable scope is 10 mm at least).
The space for routing power cables, optical fibers, and subscriber cables are planned properly
in the outdoor cabinet. Various types of cables are routed separately and the cables do not
cross over each other. The positions of the DDF and the ODF are proper to ensure that the
cable length is proper after the device is installed.
The fiber management tray is installed in a proper position beyond the air exhaust vent.
The top of the device is not higher than the lower edge of the air exhaust vent in the cabinet
when the device is installed in an outdoor cabinet. After installation, the distance between the
device top and the barrier of the cabinet top is at least 50 mm.
Place the battery and device in different compartments of the outdoor cabinet if possible to
protect the device against corrosion.
Ventilation and Heat Dissipation Performance of the Outdoor Cabinet

Requirements on the ventilation and heat dissipation performance of the outdoor cabinet:
Obvious air intake vent and air exhaust vent are distributed in the air duct of the outdoor
cabinet after the device is installed. The vent position and vent dimensions are proper and
meet the environment specifications of the device.
Outdoor Cabinet Monitoring

The outdoor cabinet can monitor the door status, temperature, and surge protection.
2.3.2 Standards of the Outdoor Cabinet

Standard Description
ID
IEC 529 First characteristic Dust-protected: Ingress of dust is not totally

numeral: 5. prevented but dust does not enter in sufficient
quantity to interfere with satisfactory operation of the
equipment
Second characteristic Protected against water jets: Water projected by a

numeral: 5. nozzle against the enclosure from any direction shall
have no harmful effect
2.4 Basic Installation Specifications

A correct installation mode is the prerequisite for ensuring that the ONU works normally.
Keep off electromagnetic interference. Do not route ground cables or subscriber

cables into the room in the overhead mode.
Connect the ground cable to the ground bar. It is recommended that you use the metal
tube that is grounded to route cables out of
the outdoor cabinet.

Do not use the cabinet that is not waterproof Ground subscriber cables in a unified way.
outdoors. The protection rating of the
outdoor cabinet must reach IP55.
Use a dedicated surge protection bar. The device does not have any ground cable.
Seal the cable apertures of the cabinet Ensure that the cabinet door is locked when
properly to prevent dust or insects from the device is running.
entering the cabinet.
Ensure that the ventilation openings of the The ends of the optical fiber that is not used
network cabinet are free of obstacle. must be protected with dustproof caps.

Replace the air filter if its holes are too The corrugated tube does not enter the
small for the wind to enter the device. network cabinet and the cut of the
Regularly clean or replace the air filter in corrugated tube is not smoothened.
the area with heavy dust.
The metal wire of the optical cable that is Signal cables must be routed separately
not in the overhead mode must be fastened. from power cables.
When the device is installed on a wall, Ensure that cable connectors and ports do
instead of using plastic or other parts, use not face upwards.
the mounting brackets and expansion bolts
delivered with the device to fasten the
device.
When the device is installed indoors, if the When the device is installed in overhead/
device is close to the sewer or heating line, side cabling mode network cabinet, the
water may easily damp or enter the device. water may enter the device through cables.
It is recommended that route cables under
the aperture, keep the distance about
100mm.
Overhead/side
Cabling Mode
Network Cabinet Aperture
Cable
≥100mm

Do not install devices close to the window. Do not install devices in resting places.
For example, install the IMB network
cabinet at least 5 meters away from the
window and install the APM30H cabinet at
least 10 meters away from the window to
avoid the influence of noises while
protecting devices against wind and rain.
The following figure shows the distance
requirements for installing an IMB network
cabinet.
Window
≥ 5m
A
T
≥ 5m N
Door
When devices are installed into an IMB It is recommended to clean the air filter
network cabinet or APM30H cabinet every three months if devices are installed
without a temperature control unit (such as in residential areas or dusty areas and clean
air conditioner or heat exchanger), ensure the air filter every six months if devices are
that the IMB network cabinet or APM30H installed in remote regions or noise-
cabinet is not completely closed. The air insensitive areas. In this manner, noise
intake vent and air exhaust vent on the IMB pollution caused by heavy dust is avoided.
network cabinet or APM30H cabinet must
match air channels.

Installation Guide 3 General Installation Guidelines
3 General Installation Guidelines
About This Chapter
This chapter describes the general installation guidelines on unpacking and inspecting
equipment, installing boards, checking optical fiber connections, equipment grounding
regulations, engineering labels, cable routing and bundling, and making and testing cable
connectors.
3.1 Unpacking Inspection
When a project starts, the project supervisor should work with the customer to unpack and
inspect the delivered equipment.
3.2 Installing chassis
The installation modes for chassis vary with installation environment.
3.3 Installing Boards
Generally, the chassis for delivery is installed with boards. If boards need to be delivered
separately, install the boards by following guidelines stated in this chapter.
3.4 Checking Tail Fiber Connection
This section describes how to check the fiber connection by using an optical interface board.
3.5 Grounding Specifications
Suitable grounding helps to avoid accidental personal injury and guarantee the safe running of
the equipment, and provide EMC shielding to improve the quality of service (QoS).
3.6 Engineering Labels
Engineering labels are attached to both ends of various cables to identify the physical
positions of cables on different devices. There are two types of engineering labels, specialized
for the power cables and signal cables respectively.
3.7 The Requirements of Cabling and Bundling
Introduces the requirements of cabling and bundling the cables.
3.8 Binding Strap
This chapter introduces the architecture and usage of the binding strap, as well as precautions
for bundling the optical fibers.
3.9 Assembling and Testing the Cable Connector
This section describes how to assemble the cable connector and how to test the connectivity
of the cable.

3.1 Unpacking Inspection

When a project starts, the project supervisor should work with the customer to unpack and
inspect the delivered equipment.
3.1.1 Unpacking the Chassis

Unpack the chassis before starting the installation.
Prerequisites
The chassis must be delivered to the site.
Tools, Instruments, and Materials

l ESD gloves
l Diagonal pliers
l Paper knife
Precautions
l Integrated circuits (ICs) are sensitive to electrostatic discharge from the human body.
When handling boards or metallic parts of the equipment, wear ESD gloves and hold only
the edges of the boards during operation.
l If the equipment is transported from a cold and dry place to a warm and damp place, wait
at least 30 minutes before unpacking it. Otherwise, the moisture condenses on the board
surface and damages the components.
Procedure
Step 1 Transport the packing box to the equipment room.
Step 2 Check the packing box, and stop unpacking it in any of the following cases:
l The outer package is severely damaged.
l There is water leakage on the outer package.
Find the causes and provide feedback to the local representative office of Huawei.
Step 3 Observe the labels on the carton to check the equipment configuration and take a record.
Step 4 Cut the strap with the diagonal plier and then split the adhesive tape properly along the seam
between the cover and the body of the box with the paper knife. Do not scratch the articles
inside the box.
Step 5 Open the carton and take out the chassis box from the carton.

Step 6 Open the chassis box and take out the chassis. Then, check whether the chassis is damaged.
----End
3.1.2 Unpacking Boards

If the board is separately delivered, unpack the board before you install it.
Prerequisites
None
Tools, Equipment and Materials

l ESD wrist strap or ESD gloves
l Diagonal pliers
l Paper knife
Background Information
Generally, the board has been installed in the chassis properly before delivery and is shipped
together with the chassis. If a carton is used to pack boards for shipping, unpacking and
checking are necessary when the boards arrive at the destination. (Generally, a carton is used
when boards are required for capacity expansion.) The boards are put into shielding bags for
transportation. Take ESD protection measures when you unpack the boards to prevent damage
to them.
Precautions
Electronic circuits and components are extremely sensitive to electrostatic discharge (ESD).
When handling circuit boards, make sure that you wear a securely grounded ESD wrist strap
or ESD gloves, and only hold the edge of boards during operation.
Procedure
Step 1 Wear a securely grounded ESD wrist strap (or ESD gloves) and make sure that it is securely
grounded. Check the packing box of the board and make sure it is intact without any damage.
Step 2 Cut the straps with diagonal pliers and use a paper knife to split the tape along the seam
between the cover and the box body. See Figure 3-1.
Do not cut too deep into the carton with the paper knife. Otherwise, the knife might scratch
the articles inside.

Figure 3-1 Board carton
Pressure-sensitive Label on the

Foam plate
adhesive tape board box
Board box
Strap
Carton label
Cushon foam
Board box
Board Shielding bag
NOTE
l Each board is packed in both a cushion foam and an shielding bag. Keep the bags properly. They can
be used later for keeping the boards or packing the damaged boards returned for repair.
l The ambient temperature and humidity may have an impact on the boards. In each shielding bag
there is a small bag of desiccant, which shall not be thrown away.
l Wait for at least 30 minutes before unpacking if the board is just moved from a cold, dry place to a
warm, damp place. Otherwise, moisture will condense on the board surface and damage the
components.
Step 3 Open the carton and check whether the number and type of the boards are consistent with
what is marked on the carton label. Check that there is no evident damage on the board
package.
Step 4 Open the board box and take the board out of the shielding bag.
l Hold the bottom of the shielding bag with the left hand.
l Take the board out of the bag gently by its front panel with the right hand.
l Do not touch any electronic component on the board surface to avoid damage.
l Keep the bags properly.
Step 5 Check whether the board is physically damaged or is not in line with the packing list. Table
3-1 lists the checklist. In this case of any damage to the board, contact local representatives of
Huawei.

Table 3-1 Board checklist
Item Requirement
Name and quantity The board name and quantity should be in

line with the contract or packing list.
Outer view The board should be clean and free of any

scratch, loose component, or damage.
Connector The connector should be properly installed

and free of tilted or deformed pins.
Step 6 If no problem is found, put the board back into the board box and put it in the place specified
by the customer.
l If you are going to install the board right after unpacking, place the board on an ESD
surface to discharge the static electricity.
l If you are going to install the board at a later time, pack the board using the original
materials and place them at a cool dry place without direct sunshine or strong
electromagnetic radiation.
----End
3.1.3 Requirements of Inspection

The received goods must be inspected against the Packing List item by item.
l After the goods are inspected complete and intact, both the engineering supervisor and
the customer must sign the Packing List. After that, the customer takes over the goods.
l During the inspection, if some equipment is stated undelivered in the Packing List,
directly report the situation to the order management engineer of the local office of
Huawei for subsequent handling. Both the engineering supervisor and the customer shall
sign the Packing List to confirm the situation.
l If any short, wrong, extra or damaged equipment is found during the inspection, both
parties shall sign the Unpacking Memo and the Packing List. The project supervisor
shall fill in the Equipment Problem Report and send it to the order management engineer
of the local office of Huawei within three days.
3.2 Installing chassis

The installation modes for chassis vary with installation environment.
NOTE
l When installing the equipment in a 19-inch open rack, a 19-inch cabinet, or an N63E cabinet, see the
NE05E&NE08E Series Quick Installation Guide (19inch&ETSI Cabinet).
l When installing the equipment in an IMB network cabinet, see the NE05E&NE08E Series Quick
Installation Guide (IMB Cabinet).
l When installing the equipment in an outdoor APM30H cabinet, see the NE05E&NE08E Series Quick
Installation Guide (APM30H Cabinet).

3.3 Installing Boards

Generally, the chassis for delivery is installed with boards. If boards need to be delivered
separately, install the boards by following guidelines stated in this chapter.
3.3.1 Inserting a Board

This section describes how to insert a board in the chassis.
Prerequisites
The chassis must be installed correctly.

ESD wrist strap, Phillips screwdriver
Procedure
Step 1 Connect the ESD wrist strap to the ESD jack on the chassis. Then, wear the ESD wrist strap
as shown in Figure 3-2.
Figure 3-2 Expected connection of the ESD wrist strap
Step 2 If a slot is covered with a filler panel, loosen the two captive screws using a screwdriver until
the screws spring out. Then, remove the filler panel.
Step 3 Rotate the ejector levers on the front panel of the board to the open position with both hands.
Step 4 Push the board gently into the slot along the guide rails. Then, push the front panel of the
board up to end when the board engages with the socket on the backplane. See Figure 3-3.

Figure 3-3 Inserting a board
Button
Step 5 Rotate the ejector levers to the close position. Figure 3-4 shows the expected insertion of the
board.
Step 6 Tighten the captive screws on the board, as shown in Figure 3-4. Installation of the board is
complete.
Figure 3-4 Tightening captive screws on the board
----End
3.3.2 Removing a Board

This section describes how to remove a board.
Prerequisites
The fibers or cables connected to the board must be removed.

ESD wrist strap, Phillips screwdriver, ESD box or ESD bag
Precautions
Removing a working board may affect the equipment or interrupt services.

Procedure
Step 1 Wear the ESD wrist strap properly according to Figure 3-2.
Step 2 Loosen the captive screws on the front panel with the Phillips screwdriver until the screws
spring out. Then, rotate the ejector levers of the board to the open position with two hands
when the board disconnects to the socket. See Figure 3-5.
Step 3 Remove the board with stable force. See Figure 3-5.
Figure 3-5 Removing a board
Button
Step 4 The removed board must be put into an ESD box or ESD bag. If the empty slot does not
house any other board, install a filler panel onto the slot according to 3.3.3 Installing a Filler
Panel.
----End
3.3.3 Installing a Filler Panel

The empty slot should be covered with a filler panel to ensure proper EMC and to keep dust
away.
Prerequisites
None

ESD wrist strap, Phillips screwdriver
Procedure
Step 1 Cover the filler panel onto the empty slot.
Step 2 Drive on the captive screws on the filler panel according to Figure 3-6.
Figure 3-6 Tightening captive screws on the board

----End
3.4 Checking Tail Fiber Connection

This section describes how to check the fiber connection by using an optical interface board.
Prerequisites
The fiber must be installed and routed from the optical interface to the ODF.
On the power supply device side, the power switch must be turned on.

Optical power meter
Short fiber
Precautions
Avoid direct eye exposure to laser beams when connecting the fiber.
Connection Diagram for the Check

When using an optical interface board to test the fiber connection, connect the fiber to the
optical power meter on the ODF side and connect the fiber to the OUT port of the optical
interface board on the chassis side.
Procedure
Step 1 On the chassis side, remove the fiber that connects to the OUT port of an optical interface
board.
Step 2 Connect the optical power meter to the OUT port of the optical interface through the fiber.
Step 3 Turn on the optical power switch and set the working wavelength according to the optical
interface type. The optical power meter reads that the launched optical power of the optical
interface board is A.
Step 4 Recover the fiber connection to the OUT port.
Step 5 On the ODF side, remove the fiber that connects to the OUT port. Connect the fiber to the
optical power meter. The tested optical power is B.
Step 6 Remove the fiber from the corresponding OUT port of the optical interface board. The optical
power meter reads the LO state and receives no optical signals.
Step 7 Compare A with B.

l If the deviation between A and B is less than 1 dB, it indicates that the fiber is correctly
connected and the attenuation of the fiber is within the normal range.
l If the deviation between A and B is more than 1 dB, make sure the fiber is fine and
correctly routed, and then check whether the fiber terminal is clean.
If the fiber is connected through a flange, the deviation between A and B should be less than 2
dB. Otherwise, it indicates that the fiber is incorrectly connected and the attenuation of the
fiber is not within the normal range. Make sure that the fiber is fine and correctly routed, and
then check whether the fiber terminal is clean.
Step 8 Check the fiber of the IN port in the same way.

Step 9 Recover the fiber connections on the chassis side and ODF side.
Step 10 Repeat Steps 1 - 9 to check fiber connections to other optical interfaces.
----End
3.5 Grounding Specifications

Suitable grounding helps to avoid accidental personal injury and guarantee the safe running of
the equipment, and provide EMC shielding to improve the quality of service (QoS).
3.5.1 General Grounding Specifications

This section introduces the general grounding specifications.
General grounding specifications, as shown in Table 3-2.
Table 3-2 General grounding specifications

No. Description
1 Working ground, protection ground (including shielding ground and lightning

ground) should be bonded to the same grounding electrode.
2 Cable racks, equipment frames and enclosures, metallic air ducts and doors and
windows in the equipment room should be grounded.
3 All the metallic equipment units that are normally neutral should be grounded.
4 The ground cables should firmly contact with the ground bar in the equipment.
5 Connection to the already grounded equipment for grounding purpose is not

allowed.
3.5.2 Grounding Specifications for the Building

This section introduces the grounding specifications for the building.

Grounding specifications for the building, as shown in Table 3-3.
Table 3-3 Grounding specifications for the building

No. Description
1 Usually, the earth resistance of the telecommunication site where the base station
equipment is located is recommended to be less than 10 ohm. It also should comply
with the relative stipulation of the country.
3.5.3 Equipment Grounding Specifications

This section introduces the equipment grounding specifications.
Equipment grounding specifications, as shown in Table 3-4.
Table 3-4 Equipment grounding specifications

No. Description
1 All the network telecommunications equipment including mobile base station,

transmission equipment, switching equipment and office power should be
grounded. All the protection grounds (PGNDs) of such equipment should be finally
bonded to a general ground bar. The PGNDs in an equipment room should be
bonded to the general ground bar in the same equipment room.
2 The PGND of the equipment should be connected to the nearby ground bar (user-
supplied). Copper-core conducting cable with green-yellow plastic insulation cover
should be used. The cross-sectional area of the conductive cable is required to be 25
mm2 or wider.
3 The grounding terminals at the front door, rear door and side panels of the cabinet
should be separately connected to the grounding post of the cabinet. The cross-
sectional area of the cable is required to be 1.6 mm2.
4 The metallic units of the equipment cabinet should have good conductance. Any
nonconductive paint should be removed from the metal-to-metal contact.
5 The cabinets contact the adjacent cabinets in a row through the fixing bolts and
washers on the cabinet top. A surface of 30 x 50 mm2 around the bolt holes should
not be covered with paint. Rust-proof and rot-proof measures should be taken. The
surface of the washer and nut should be plated with nickel to ensure good electrical
conductance.
6 When the cabinets of the same type are connected, cables not longer than 300 mm
should be used to connect the grounding busbars of adjacent cabinets, if these
busbars exist. The cross-sectional area of the short cables is required to be 6 mm2.
Two ends of the short cable should be secured to the terminals of the ground bar.

3.5.4 Grounding Specifications for Office Power

This section introduces the grounding specifications for office power
Grounding specifications for office power, as shown in Table 3-5.
Table 3-5 Grounding specifications for office power

No. Description
1 TN-S AC power system should be adopted in the equipment room.
2 A C-level AC lightning protector with rated current not less than 20 KA should be
installed at the AC power cable inlet of the equipment room.
3 PGNDs of the office power and telecommunications equipment should finally

connect to the same grounding electrode. Grounds of telecommunications
equipment and office power in an equipment room should be bonded to the ground
bar in the same equipment room.
4 Lightning-proof circuit should be added to AC power interface.
5 The positive electrode of -48V/-60V DC power or the negative electrode of 24 DC

power should be grounded at the DC power outlet.
6 The working ground and PGND of DC power system and the PGND of switching
equipment should finally connect to the same grounding electrode. Grounds of
telecommunications equipment and office power in an equipment room should be
bonded to the ground bar in the same equipment room.
7 Surge-proof circuit should be added to DC power interface.
3.5.5 Grounding Specifications for Signal Cables

This section introduces the grounding specifications for signal cables.
Grounding specifications for signal cables, as shown in Table 3-6.
Table 3-6 Grounding specifications for signal cables

No. Description
1 In the case that the digital trunk line of the transmission equipment connects to the
wireless base station, no matter directly or indirectly, then E1 lightning protector
should be installed in the corresponding interface of the transmission equipment.
2 The outside cable should have metallic protection cover and two ends of the cover
should be well grounded. The end in the equipment room can be connected to the
ground bar in the equipment room. Lightning protector should be installed in the
interface connecting the coming cable. The ground cable of the lightning protector
should be as short as possible.
3 Both the outer conductor of coaxial cable and the metal shield of shielded cable
should firmly contact with the metal surface of the target equipment.

No. Description
4 Idle wire pair in the signal cable should be grounded in the equipment room.
5 The TDA tone cable should pass through the main distribution frame (MDF) that
has a security unit before it goes out the office. Metal shield of the cable should
connect with the PGND of the MDF. The MDF and the cabinet should share the
same grounding electrode.
6 Overhead signal cables in the telecommunications office or mobile base station area
is not allowed.
3.5.6 Specifications for Managing Ground Cables

This section introduces the Specifications for managing ground cables.
Specifications for managing ground cables, as shown in Table 3-7.
Table 3-7 Specifications for managing ground cables
No. Description
1 Ground cables should be routed separately with signal cables.
2 Ground cables should not be routed into the equipment room through overhead
cable trays. They should be routed under ground or inside the room.
3 The PGNG cable must be a jointless copper-core cable. Installing connectors,

splices or breakers to ground cables is not allowed.
4 The PGND cable should use copper-core conducting cable with green-yellow
plastic insulation cover.
5 The neutral wire of the AC power cable should not connect with the PGNDs of the
telecommunications equipment in the equipment room.
6 The PGND cable should be as short as possible (no more than 30 m). Otherwise, the
user should adjust the position of ground bar.
3.6 Engineering Labels

Engineering labels are attached to both ends of various cables to identify the physical
positions of cables on different devices. There are two types of engineering labels, specialized
for the power cables and signal cables respectively.
The power cables include - 48 V / - 60 V power cables, power ground cables (BGND) and
protection ground cables (PGND). The signal cables include external alarm cables, network
cables, clock cables, optical fibers and so on.
Engineering labels for cables ensure the orderly and correct installation of cables of
equipment and facilitate the easy subsequent equipment maintenance and inspection.

NOTE
In case there is special requirement from the user of the equipment on the description method of the
labels, the labels should be printed accordingly. However, this must be stated in the self-check report.
3.6.1 Introduction to Labels

Introduces the labels used in the equipment.
3.6.1.1 Material
This section describes the requirements for the thickness, color, materials, ambient
temperature, and fill-in method of the labels.
The label's characteristic are as follows:
l Thickness: 0.09 mm
l Color: chalk white
l Material: Polyester (PET), with UL and CSA certifications
l Ambient temperature: - 29 to 149 degrees Celsius
l Laser printing or handwriting with oiliness markers
3.6.1.2 Type and Shape

There are two types of engineering labels for power cables and signal cables respectively.
Label for Signal Cables

The label for signal cables is L-shaped with fixed dimensions, as shown in Figure 3-7.

Figure 3-7 Label for signal cables
84.0
7.5
7.0
5.5
5.5 (2)
11.0 10.0
11.0 TO:
1.5
(2)
(1)
0.6
5.5
5.5
7.0 1.0
7.5
(1)
37.0 2.0
Unit：mm
1.Dividing line 2.Cut dotted line
The dividing lines on the label help to specify more clearly the position of a cable. For
example, there is one between the cabinet number and the frame number and another one
between the frame number and the slot number. The dividing line is 1.5 mm x 0.6 mm in size
with the color of PONTONE 656c (light blue).
The cut dotted line helps to fold the label when attaching it to the cable, and its size is 1.0 mm
x 2.0 mm.
There is a mark "TO:" (upside down in the figure) at the lower right corner of the label. The
mark is used to identify the opposite end of the cable on which the label is attached.
Label for Power Cables

The label for power cables should be attached to the identification plate on the cable ties that
are bundled to the cable. The identification plate has an embossment of 0.2 mm x 0.6 mm
around (symmetric on both sides), and the area in the middle is for attaching the label, as
shown in Figure 3-8.

Figure 3-8 Label for power cables
10 R1.0
26.2
TO:
12.2 11
0.6 (2) 25
(1) 1.5
100
0.6
(3)
1.Cable tie 2.Label 3.Dividing line on the label
3.6.2 Information Carried on Labels

This section gives the information carried on labels for signal cable and power cable.
3.6.2.1 For Power Cables

Labels for power cables are only attached on one side of the identification plates. On the
labels, there is information (the part after the mark "TO:") about the location of the device on
the other end of the cable, like the location of control cabinet, distribution box or power
socket.
3.6.2.2 For Signal Cables

The two sides of the label attached on the signal cable carry information about the location of
the ports connected to both ends of the cable.
The information is given like this:
l Area 1 contains the location information of local end of the cable.
l Area 2 (with the mark "TO:") contains the location information of the opposite end of the
cable.
l Area 3 has been folded up inside the label.
Printed parts on the label for signal cables, as shown in Figure 3-9.

Figure 3-9 Label for signal cables
Area 1 Area 3
Area 2 TO:
Seen from the cabling end of the equipment, the text part of the label is on the right side of the
cable. The side with "TO:" that is facing outside carries the location information of the
opposite end, and the other side carries the location information of the local end. Therefore,
the information in Area 1 at one end is the same as the information in Area 2 at the other end
of the cable, and vice versa. In other words, the local information at one end is called the
opposite information at the other end.
3.6.2.3 Remarks
To use labels, focus on the following points.
l When printing/writing and attaching labels, pay attention to keep the labels clean.
l Since the label paper is made of moistureproof and waterproof material, ink-jet printers
and ink pens are forbidden for printing and writing labels.
l Labels should be attached with good order in alignment.
l Cable ties should be bundled in the same position of power cables, with identification
plates on the same side.
l The positions of "up", "down", "right" or "left" are all based on the viewpoint of the
engineering person who is working on the label.
3.6.3 Filling Information on Labels

This section describes how to fill information on labels. The contents can be printed or written
on the labels. Printing is recommended for the sake of high efficiency and eye-pleasant
layout.
3.6.3.1 Printing Labels

Use a laser printer to print the label according to the template.
Template for the Printing

Template is available to print out the label. You can obtain the template by:
l Downloading the template from http://support.huawei.com. The directory of the
template is Documentation > Engineering Service > Engineering Quality > Quality
Standard and Template.
l Asking for the template from Huawei local office.
The template is written in Microsoft Word, as shown in Figure 3-10.

Figure 3-10 Template of label
1.Cell 2.Cell
Cells Merging on the Template

When using the template, you can directly modify the contents on the template, and the
following should be observed:
l The settings of centered characters, direction, and fonts should not be changed.
l When there are too many characters to be filled in, zoom out the characters, but make
sure the printouts are clear and legible.
To merge the cells, you should first recover the table structure (if gridlines are displayed, you
can start from Step 3 directly).
1. Select the menu item Edit >Select All.
2. Select the menu item Format > Borders and Shading >Borders. Select Box and click OK.
3. Drag the mouse to select the cells to be merged and select the menu item Table > Merge
Cells.
4. Change the content based on the original thing.
If two merged cells are still not enough to accommodate the characters, use multiple lines.
Requirements on the Printer

To print the labels, laser jet printer must be used, although there is no restriction on the model
of the printer. Before printing the label, set up the page and try the printing on ordinary blank
paper (both sides are blank):
1. Cover the blank paper onto the whole page of label paper, and check whether the page
setup conforms to the requirement.
2. Make sure the printer properties, such as "paper size" and "direction", have been set
correctly.

3. If the warning prompt as shown in Figure 3-11 appears before printing, click Ignore to
continue the printing.
Figure 3-11 Warning prompt before printing
If the printout conforms to the requirement, print it to label paper. If the printout does not
conform, adjust the page setup and try the printing again, until the correct printout is
produced. The method of adjusting the page setup is as follows:
1. Select the menu item File > Page Setup.

2. Select the Margins tab page.
3. Select Left for Gutter Position.
4. Set Header and Footer to 0, and adjust the values of Top, Bottom, Left, and Right.
After the page setup has been made correct, save it for future use. This page setup is only
necessary the first time you use the template to print the labels.
Requirements on the Printed Label

After you print the labels, check whether they comply with the template specifications:
l All the printouts must be on the label, and nothing should be printed on the bottom page
of the label.
l Contents in the cells should be aligned in the center. In a single-line printout, the
dividing lines and the mark "TO:" should not be covered by the printed characters.
l When the cells are merged and the printouts are made in multiple lines, avoid covering
the mark "TO:" when printing the texts by using the space bar to move the printing
contents to the next line.
Different from the ordinary paper, the label paper is composed of two pages. No matter what
model of printer you are using, feed in the labels one after another by hand. Never use the
auto-feed mode in order to avoid jamming the labels. Different models of printers may have
different feeding modes, make sure to feed in the labels correctly.

3.6.3.2 Writing Labels

Use the black oiliness markers delivered together with the equipment to write the labels. For
easy recognition and good-looking, the font in handwriting should be close to the standard
typeface as much as possible.
Writing pen
Use the black oiliness markers delivered together with the device to write the labels.
In special cases, black ball-pens are allowed, although not recommended. When writing with
the ball-pen, take care not to leave the oil on the label, which may contaminate the label and
blur the words.
NOTE
The delivered marker has two nibs. Make sure to use the smaller nib to write the labels.
Handwriting
For the sake of easy recognition and good looking, the font in handwriting should be close to
the standard typeface as much as possible.Table 3-8 shows the standard typeface.
Table 3-8 Standard typeface for handwriting

0 1 2 3 4 5 6 7 8
9 A B C D E F G H
I J K L M N O P Q
R S T U V W X Y Z
The font size depends on the number of figures and letters. The words must be medium-sized,
legible, tidy and good-looking.
Writing direction
Write the characters in proper size, and the direction is shown in Figure 3-12.
Figure 3-12 Writing direction of the label
TO:
3.6.4 attaching Labels

After printing or writing the label, remove the label from the bottom page and attach it to the
signal cable, or the identification plate of the power cable.

3.6.4.1 Attaching the Label to the Signal Cable

This section describes the positions where the labels should be attached on the signal cables
and the means by which the labels are folded.
Paste the label at the proper position

It is recommended to paste a label at a point 2 cm from the connector.
NOTE
In special cases, for example, to avoid cable bent or affecting other cables, other positions are allowed to
attach the labels.
The steps to attach the label to the cable are shown in Figure 3-13 The finished labels should
be on the right or top of the cables, according to different cabling methods. The left part of the
figures shows the method to attach the label when the cable is laid vertically, while the right
part of the figures shows the method to attach the label when the cable is laid horizontally.
l Stick the label to the proper position on the cable, fold the narrow part of the label
according to the directions shown in Figure 3-13.
Figure 3-13 Sticking the label onto proper position of the signal cable
2
TO:
A03 33 33 33 33
(1) (2) (3)
1. Cable 2. Label
Fold the part

Fold the printed part along the dotted line according to the directions shown in (2) of Figure
3-13.
The length of the narrow part is based on an external cable diameter of 2.6 mm, after this part
has been stuck to the back of the label, it may not overlap the entire printed part.
After the printed part of the label has been folded, the narrow part of the label should be
covered completely, as shown in Figure 3-13.

Fold the Label

Fold the label upwards along the dashed line, and attach it. After being attached, the label is
shaped as (3) of Figure 3-13.
3.6.4.2 attaching the Label to the Power Cable

This section describes the positions where the labels should be attached on the power cables
and the means by which the cable ties are bound to the power cables.
Remove the label from the bottom page, then attach it to the identification plate on the cable
tie. The label should be stuck to the rectangular flute, and should be stuck to only one side of
the identification plate. Make sure to attach the labels on the same side of the identification
plates. The cable ties are bundled 2 cm from the connectors, and other positions are allowed
in special circumstances.
Cable ties should be bundled on both ends of a cable. After the bundling, the finished
identification plate should be on top of the cable in horizontal cabling, or on the right side of
the cable in vertical cabling. Make sure the label is facing out, as shown in Figure 3-14.
Figure 3-14 Appearance of attached labels on power cables
Cable
TO:
B03
TO:
B03 -48V2
-48V2
Cable
3.6.5 Frequently Used Engineering Labels

This section describes the frequently used engineering labels. The other labels are omitted
here. You can perform the operation as required on site.
3.6.5.1 Engineering Labels for Power Cables

The labels are attached to the DC cables that provide power for the cabinets, and the
protection ground cables, including the -48 V, PGND, and BGND cables. The labels for DC
power cables are attached to one side of the identification plates on cable ties.
Table 3-9 shows the information carried on the labels for the DC power cables.

Table 3-9 Information on labels attached to the DC power cables

Content Meaning
MN(BC) - -1 MN (BC): BC is written right under MN. On the loaded cabinet

side, MN identifies the row and column number of the power
MN(BC) - -2 distribution equipment like the control cabinet and distribution
MN(BC) - BGND box, BC identifies the row and column number of the -48 V
connector (if there is no row number or column number, or the
MN(BC) - PGND connector can be identified without them, BC can be omitted).
BGND and PGND have no row and column number for
identification. On the power cabinet side, only MN is used to
identify the cabinet.
The label only carries location information about the opposite equipment, the control cabinet
or the distribution box, while information of the local end is not necessary. Table 3-9 lists the
information of two -48 V power supplies on the label. The information for other DC voltages
(such as 24 V, 60 V) should be given in similar methods. Make sure that labels are attached in
correct direction. That is, after the cable ties are bundled onto the cable, the identification
plates with the labels should face up, and the text on the labels in the same cabinet should be
in the same direction, as shown in Figure 3-15.
Figure 3-15 Example of the labels on the DC power cable

TO:
TO:
A01 -48V2
B03 -48V2
B08
The label on the loaded cabinet The label on the distribution unit
side, which carries the information side, which carries the information
about the position of the cable on about the position of the cable on
the power distribution unit. the loaded cabinet side.
On the loaded cabinet side, the label marked with "A01/B08- -2" on the cable indicates that
the cable is -2 DC supply, which is from the eighth connector on the second row of -48V bus
bar in the cabinet on Row A, and Column 1 in the equipment room.
On the distribution unit side, the label marked with "B03- -2" indicates that the cable is -2 DC
supply, which is from the loaded cabinet on Row B, Column 03 in the equipment room.

NOTE
l In the power distribution unit (or the first power cabinet of a row in the transmission equipment
room), every terminal block on the - connector bar has a numeric identification. For example, in
the above label of "A01/B08--48V2", "08" (or sometimes "8") is the numeric identification of the
terminal block.
l PGND and BGND are two copper bars, on which the terminal blocks are connected, therefore
which terminal is connected makes no difference. It is only necessary to give the row and column
of the power distribution unit, instead of giving the specific serial number of the terminal block on
the copper bar. For example, if the label on the loaded cabinet side is "A01-BGND", it means that
the power cable is a BGND that connects BGND copper bar in the power distribution unit on Row
A, Column 01 in the equipment room. Information on the labels for PGND cables should be given
in the similar way.
3.6.5.2 Engineering Labels for External Cables of Alarm Box

The external cables of alarm box are connected to the first subscriber cabinet of each row
(used for power distribution). Labels posted on the first cabinet of each row should indicate
which equipment is using the access terminal.
Labels are not needed on the equipment side unless there is special requirement. In this case,
only Area 2 of the label should be filled in.
Table 3-10 shows the information on the labels of alarm box external cables.
Table 3-10 Information on labels attached to the external cables of alarm box
Content Meaning Example
MN MN: serial M: The cabinets going from front to back (in a row) in
number of the the equipment room are numbered from A to Z.
cabinet in the N: The cabinets going from left to right (in a column)
equipment room are numbered from 01 to 99.
For example, A01 is the cabinet in Row A and Column
01.
The label on the alarm cable carries simple information, and only part of the text area needs to
be filled in. It is recommended to keep the whole length of the label instead of cutting out the
blank area.
Figure 3-16 shows a label on the alarm cable, on which "A01" indicates that the alarm cable
connects the first cabinet and the cabinet on Row A, Column 01 in the equipment room.
Figure 3-16 Example of the label on the alarm cable

3.6.5.3 Engineering Labels for Ethernet Cables

These labels are attached to the Ethernet cables that connect the boards in the frames, or on
the cables that connect hubs and servers or agents of the Value Added Service (VAS)
products.
Meaning of the Label

Table 3-11 shows the information on both sides of the labels attached to the Ethernet cables
that connect the boards in the frames.
Table 3-11 Information on labels attached to the Ethernet cables

MN-B-C-D MN: cabinet For example, A01

number
B: frame Numbered in top-down order with two digits, for

number example, 01
C: physical slot Numbered in top-down and left-right order with two

number digits, for example, 01
D: Ethernet port Numbered in top-down and left-right order with two

number digits, for example, 01
MN-Z MN: cabinet For example, B02

number
Z: location Valid location number of the terminal device onsite.

number If the cable is connected to a router in a cabinet, the
serial numbers of the cabinet, the frame and the
Ethernet interface of the router should be specified,
for example, B02-03-12. If the cable is connected to
the network management station (NMS), specific
location of the NMS should be given.
Example of the Label

Figure 3-17 shows the label on the Ethernet cable:
Figure 3-17 Example of the label on the Ethernet cable
"A01-03-10-05" indicates that on the local end of the Ethernet cable is connected to Ethernet
Port 05, Slot 10, Frame 03 of the cabinet on Row A, Column 01 in the equipment room.

"B02-03-12" indicates that the opposite end of the Ethernet cable is connected to Ethernet
Port 12, Frame 03 of the cabinet on Row B, Column 02 in the equipment room.
3.6.5.4 Engineering Labels of the Fibers Between Two Devices

These labels are attached to the fibers that connect the optical interfaces on the boards in a
frame, or on the device boxes. There are two types of labels for fibers: one is for the fiber that
connects the optical interfaces on two devices, the other is for the fiber that connects the
device and the optical distribution frame (ODF).

Table 3-12 shows the information on both sides of the labels attached to the fiber that
connects two devices.
Table 3-12 Information on labels attached to the fiber between two devices
MN-B-C-D-R/T MN: cabinet number For example, A01
B: frame number Numbered in top-down order with two

digits, for example, 01
C: physical slot number Numbered in top-down and left-right

order with two digits, for example, 01
D: optical interface number Numbered in top-down and left-right

R: optical receiving -
interface
T: optical transmitting
interface
MN-B-C-D-R/T MN: cabinet number The meanings are the same as above.
When the local device and the opposite
B: frame number end device are not in the same
C: physical slot number equipment room, MN can be the name
of the equipment room.
D: optical interface number
interface
interface

Figure 3-18 shows the label on the fiber jumper between two devices:

Figure 3-18 Example of the label on the fiber between two devices
"A01-01-05-05-R" indicates that the local end of the fiber jumper is connected to Optical
Receiving Interface 05 on Slot 5, Frame 01 in the cabinet on Row A, Column 01 in the
equipment room.
"G01-01-01-01-T" indicates that the opposite end of the fiber jumper is connected to optical
transmitting interface 01 on Slot 01, Frame 01 in the cabinet on Row G, Column 01 in the
equipment room.
3.6.5.5 Labels for the Fiber that Connects the Device and the ODF
The label stuck on the fiber from the equipment to the ODF contains all necessary information
on the cabinet and the ODF.

Table 3-13 shows the information on both sides of the labels attached to the fiber that
connects the device and the ODF.
Table 3-13 Information on labels attached to the fiber between the device and the ODF
B: frame number Numbered in bottom-up

order with two digits, for
example, 01
C: physical slot number Numbered in top-down and

left-right order with two
D: optical interface number Numbered in top-down and

left-right order with two
MN-B-C-D-R/T R: optical receiving interface -

T: optical transmitting interface

ODF-MN-B-C-R/T MN: row number and column M indicates a row that is

number of ODF numbered A to Z from front
to back in order.
N indicates a column that is
numbered 01 to 99 from left
to right in order, for
example, G01 is the ODF of
Row G and Column 01.
B: row number of the terminal Range from 01 to 99, for

device example, 01-01
C: column number of the terminal

device
R: optical receiving interface -

T: optical transmitting interface

Figure 3-19 shows the label on the fiber jumper between the device and the ODF.
Figure 3-19 Example of the label on the fiber between the device and the ODF
"ODF-G01-01-01-R" indicates that the local end of the fiber jumper is connected to the
optical receiving terminal on Row 01, Column 01 of the ODF in Row G Column 01 in the
equipment room.
"A01-01-05-05-R" indicates that the opposite end of the fiber jumper is connected to Optical
Receiving Interface 5 on Slot 05, frame 01 in the cabinet on Row A, Column 01 in the
equipment room.
3.6.5.6 Engineering Labels for Trunk Cables

The trunk cables include 75-ohm/120-ohm E1 cables as well as clock cables.
There are two types of labels for trunk cables. One type is used for the trunk cable connecting
two devices, such as the trunk board and built-in transmission unit. The labels are stuck at
both ends of one cable and indicate the positions of the two ends at the equipment side or at
the two trunk boards in equipment. The other type is used for the cable connecting the device
and the digital distribution frame (DDF). The labels are stuck at both ends of one cable and
indicate the position of the two ends at the equipment and the DDF.


Table 3-14 shows the information on both sides of the labels attached to the trunk cable that
connects two devices.
Table 3-14 Information on labels attached to the trunk cable between two devices
B: frame number Numbered in bottom-up order with two

C: physical slot number Numbered in top-down and left-right

D: cable number Numbered in top-down and left-right

interface
interface
MN-B-C-D-R/T Same as above Same as above
Table 3-15 shows the information on both sides of the labels attached to the trunk cable that
connects the device and the DDF.
Table 3-15 Information on labels attached to the trunk cable between the device and the DDF
B: frame number Numbered in bottom-up order

with two digits, for example, 01
C: physical slot number Numbered in top-down and left-

right order with two digits, for
example, 01
D: cable number Numbered in top-down and left-

right order with two digits, for
example, 05
interface
interface

DF-MN-B-C-D/R/T MN: row number and M indicates a row that is

column number of the DDF numbered A to Z from front to
back in order.
N indicates a column that is
numbered 01 to 99 from left to
right in order, for example, G01
is the DDF of Row G and
Column 01.
B: row number of the Range from 01 to 99, for

terminal example: 01-01.
C: column number of the

terminal
D: direction A or B There is such a mark in DDF:

R: optical receiving A: indicating the DDF terminals
interface are connected to the optical
T: optical transmitting network equipment
interface B: indicating the DDF terminals
are connected to the switching
equipment

Figure 3-20 shows the label on the trunk cable between two devices:
Figure 3-20 Example of the label on the trunk cable between two devices
"G01-01-05-12-T" indicates that the local end of the trunk cable is connected to the
transmitting terminal of Trunk Cable 12 on Slot 05, Frame 01 in the cabinet on Row G,
Column 01 in the equipment room.
"D02-01-01-10-R" indicates that the opposite end of the trunk cable connects with the
receiving terminal of Trunk Cable 10 on Slot 01, Frame 01 in cabinet on Row D, Column 02
in the equipment room.
Figure 3-21 shows the label on the trunk cable between the device and the DDF:
Figure 3-21 Example of the label on the trunk cable between the device and the DDF

"A01-03-01-01-R" indicates that local end of the trunk cable connects with the receiving
terminal of Trunk Cable 01 in Slot 01, Frame 03 of the cabinet on Row A, Column 01 in the
equipment room.
"DDF-G01-01-01-AR" indicates that the opposite end of the trunk cable connects the
receiving terminal of Direction A (connected to optical network equipment) on Row 01,
Column 01 of the DDF on Row G and Column 01 in the equipment room.
3.7 The Requirements of Cabling and Bundling

Introduces the requirements of cabling and bundling the cables.
3.7.1 The Requirements of Cabling

Describes the method and requirements of cable routing.
l For equipment room installed with supports and ESD protection floor, cables can be
arranged in downward mode. That is, all cables can be routed through the interlayer of
the floor or the cable trough. If the overhead cabling mode is adopted, cable tray is
required above the cabinet for holding cables.
l The specifications and cross-sectional area of the cable, and the route and position for
cabling should be designed beforehand.
l All cables should be arranged neatly, with their sheaths remaining intact.
l Communication cables, such as alarm cables, network cables and clock cables, should be
arranged separately with the power cable and optical fibers.
l Turnings of the cable should be smooth, with the bend radius reaching 60mm or above.
l Any damage to the insulation layer of the conducting line is not allowed.
l The cable arrangement should take the future maintenance and capacity expansion into
consideration.
3.7.2 The Requirements of Bundling

Describes the method and requirements of cable binding.
l Bundling of the cable should be tidy, clear and elegant. As a general rule, cables are
grouped by types, or grouped as needed when they are in a large number. Bind them with
cable ties and route them in either upward or underfloor cabling mode in the cabling area
at the two sides of the cabinet.
l Cables must be bundled when arranged in ducts. Bind the cables closely with appropriate
tightness. The space between the cable ties should be even and the overall appearance of
the cabling nice.
l You may not bind the cables when arranged in cable troughs. But they should be placed
tidy and straight in the trough with no crossover. Moreover, the cables can not overflow
the trough. At two ends and turnings of the trough, use a plastic clip for the cables.
l Cables both inside and outside the cabinet must be bundled. Keep the cables bundled
closely and neatly.
l Use cable ties of different specifications for cables according to actual circumstances.

l Do not connect two cable ties in bundling. Otherwise, the binding strength will be
weakened.
l After the bundling, cut the remaining part of the cable tie smoothly, removing all burrs.
l The space between the cable ties is even and is three or four times the size of the bundle
diameter.
l When making turning for the bundled cable, keep the bend radius as big as possible to
avoid breaking the cable cores at the turning.
Figure 3-22 shows the specific operation of bundling.
Figure 3-22 Cable bundling
1. No cable tie at turning 2. Cable tie 3. Burr 4. Cut smoothly
3.8 Binding Strap

This chapter introduces the architecture and usage of the binding strap, as well as precautions
for bundling the optical fibers.

To avoid any human-caused accidents, read this chapter carefully before bundling the fiber
jumpers.
3.8.1 Binding Strap

The section describes the architecture and cutting of the binding strap.
3.8.1.1 Architecture
The binding strap fulfills its locking function by cooperation of these two sides.
The binding strap for optical fiber is 12.7 mm wide, with one hook side (transparent
polypropylene material) and one mat side (black nylon material).
The architecture of the binding strap ,as shown in Figure 3-23.
Figure 3-23 Binding strap
2
1. Hook side 2. Mat side
3.8.1.2 Cutting
This procedure cutting the binding strap after installing the fiber jumpers.
Prerequisites
None

l Cutterbar

l Binding strap
Precautions
NOTE
You can use a pair of scissors if there is no cutterbar on site.
Procedure
Step 1 Install the binding strap on the plastic axis of the cutterbar, as shown in Figure 3-24.
Figure 3-24 Install binding strap on cutterbar
2 3
1. Binding strap 2. Plastic axis 3. Cutterbar
Step 2 Roll the binding strap and allow it to pass through the guiding trough of the cutterbar.
Step 3 Cut the binding strap into appropriate length by slantly hauling the binding strap towards the
cutter tooth of the cutterbar, as shown in Figure 3-25.
Figure 3-25 Cut the binding strap
1 2
3
1. Binding strap 2. Guiding trough 3. Cutter tooth

----End
3.8.2 Bundling the Binding Strap

This section describes how to bund the binding strap.
3.8.2.1 Procedures for Bundling the Binding Strap

This procedure describes how to bind bundling of the binding strap
Prerequisites
None

l Optical fiber
l Binding strap
Precautions
NOTE
When you use a binding strap, keep the mat side inside and the hook side outside.
Procedure
Step 1 Arrange the optical fibers into a bundle.
Step 2 Cut off a piece of binding strap of appropriate length according to the size of the bundle.
Step 3 Hold the fiber bundle with one hand and press one end of the binding strap on the bundle with
the thumb.
Step 4 Strain the binding strap by the other end with the other hand, as shown in Figure 3-26.
Figure 3-26 Step 2 of bundling optical fiber

Step 5 Turn the binding strap around the fiber bundle with appropriate strain till the mat side adhibits
the hook side snugly, as shown in Figure 3-27.
Figure 3-27 Step 3 of bundling optical fiber
----End
3.8.2.2 Expected Result

The section describes the expected result of the binding strap.
Figure 3-28 shows the bundling result.
Figure 3-28 Bundling result of optical fiber
3.8.2.3 Precautions
Bundle the fibers as the follow items.
l It is only the mat side of the binding strap that contacts the optical fiber.
l Arrange the optical fibers tidily into a bundle before bundling.
l Bundle the optical fibers with appropriate tightness. Never bind them too tight.

l The space between two binding straps should not exceed 40 cm.
3.9 Assembling and Testing the Cable Connector

This section describes how to assemble the cable connector and how to test the connectivity
of the cable.
3.9.1 Assembling and Testing the E1 Coaxial Cable Connector

This section describes how to assemble the E1 coaxial cable connector and how to test the
connectivity of the cable.
3.9.1.1 Assembling the Straight BNC Male Connector with the Coaxial Cable
This section describes how to assemble the straight BNC male connector with the coaxial
cable.
Prerequisites
None

Wire stripper
Crimper (with a jaw of 2.5 mm)
Coaxial cable, whose components are shown in Figure 3-29.
Straight BNC male connector, whose components is shown in Figure 3-29.
Figure 3-29 BNC connector and coaxial cable
Heat shrink tube
Crimping sleeve
Connector
External conductor of
the coaxial cable
Protection tube of the coaxial cable
Internal conductor
of the coaxial cable
Insulation layer of the coaxial cable

Procedure
Step 1 Strip off the sleeve of the coaxial cable according to the coaxial cable materials and sizes
shown in Figure 3-30. The external conductor, insulation layer and internal conductor should
be exposed as shown in Figure 3-30. Table 3-16 lists the recommended length of the reserved
external conductor (L1), reserved insulation layer (L2) and stripped sleeve (L3).
Figure 3-30 Stripping off the coaxial cable
External conductor
Insulation layer of
the coaxial cable Protection tube of
the coaxial cable
Internal conductor L1
of the coaxial cable L2
L3
l When stripping off the sleeve of the coaxial cable, do not scratch the external conductor.
l You can also determine the stripping size according to the size of the connector. Refer to
Figure 3-31.
Table 3-16 Stripping size of the common coaxial cables

Cable External L1 (mm) L2 (mm) L3 (mm) Remarks
Type Diameter
Label for of the
the NM Coaxial
cable Cable
SYFVZP- 1.6 mm 5-6 7-9 10-12 -

MC 75-1-1
SYFVZ-75- 2.2 mm 5-6 7-9 10-12 -

1-1(A)
SYV-75-2- 3.9 mm 5-6 7-9 10-12 National

2 trunk 155M-
I


Type Diameter
Label for of the
the NM Coaxial
cable Cable
SYV-75-4- 6.7 mm 5-6 7-9 10-12 National

2 trunk 155M-
III
SFYV-75-2 3.2 mm 5-6 7-9 10-12 National

-1 trunk -II
SFYV-75-2 4.4 mm 5-6 7-9 10-12 National

-2 trunk 155M-
II
Figure 3-31 Size of the straight BNC male connector and the stripping size of the coaxial
cable
L1 L1
L2 L2
L3 L3
Step 2 Successively lead the heat shrink tubing and crimping sleeve through the coaxial cable, as
Figure 3-32 Leading the heat shrink tubing and crimping sleeve
Protection tube of
the coaxial cable
External conductor Heat shrink tube
Crimping sleeve

Step 3 Unfold the external conductor of the coaxial cable to a trumpet shape, as shown in Figure
3-33.
NOTE
If the diameter of the cable that matches the connector plug is 2.2 mm and that of the coaxial cable is 1.6 mm,
twist the external conductors of the coaxial cable as one. You do not need to unfold the external conductor.
Otherwise, it cannot be crimped tight.
Figure 3-33 Unfolding the external conductor of the coaxial cable
External conductor
Step 4 Insert the insulation layer and internal conductor into the connector plug of the coaxial cable.
The external conductor of the coaxial cable partly wraps the external conductor of the
connector, as shown in Figure 3-34.
Figure 3-34 Inserting the straight BNC male connector into the coaxial cable
Connetor
Step 5 Use a welding tool to weld the internal conductor of the coaxial cable with the internal
conductor of the coaxial cable connector, as shown in Figure 3-35.

Figure 3-35 Welding the internal conductor

Internal conductor of
the coaxial cable
Connector
Welding
Step 6 Push the crimping sleeve toward the connector. Crimp the external conductor of the coaxial
cable tight. Use a crimping tool to tighten the crimping sleeve and coaxial cable connector, as
NOTE
crimp the external conductor of the coaxial cable twice by using the crimper with a jaw of 2.5 mm. That is,
crimp the external connector, rotate it by 90 degree, and then crimp it again.
Figure 3-36 Crimping the external conductor
Crimping sleeve
Step 7 Use a heat gun to blow the heat shrink tubing so that the tube can be tightly clad with the
crimping sleeve, as shown in Figure 3-37. In this way, the straight BNC male connector is
assembled with the coaxial cable.

Figure 3-37 Blowing the heat shrink tubing
Heat shrink tube
----End
3.9.1.2 Assembling the L9-M Male Connector with the Coaxial Cable
This section describes how to assemble the L9-M male connector with the coaxial cable.
Prerequisites
None

Wire stripper
L9-M male connector, whose components are shown in Figure 3-38.
Figure 3-38 L9-M connector and coaxial cable
Protection tube
of the connector
Crimping sleeve
Connector
External conductor
Internal conductor Protection tube of
of the coaxial cable the coaxial cable
Insulation layer of
the coaxial cable

Procedure
be exposed. See Figure 3-39. Table 3-16 lists the recommended length of the reserved
external conductor (L1), reserved insulation layer (L2) and stripped sleeve (L3).
External conductor
Insulation layer of
Protection tube of
the coaxial cable
the coaxial cable
Internal conductor of L1
the coaxial cable
L2
L3
l You can also determine the stripping size according to the size of the connector. Refer to
Figure 3-40.

Type Diameter
Label for of the
the NM Coaxial
cable Cable
SYFVZP- 1.6 mm 5-6 7-9 10-12 -

MC 75-1-1
SYFVZ-75- 2.2 mm 5-6 7-9 10-12 -

1-1(A)
SYV-75-2- 3.9 mm 5-6 7-9 10-12 National

2 trunk 155M-
I


Type Diameter
Label for of the
the NM Coaxial
cable Cable
SYV-75-4- 6.7 mm 5-6 7-9 10-12 National

2 trunk 155M-
III
SFYV-75-2 3.2 mm 5-6 7-9 10-12 National

-1 trunk -II
SFYV-75-2 4.4 mm 5-6 7-9 10-12 National

-2 trunk 155M-
II
Figure 3-40 Size of the connector and stripping size of the coaxial cable
L1 L1
L2 L2
L3 L3
Step 2 Lead the protection tube and crimping sleeve through the coaxial cable, as shown in Figure
3-41.
Figure 3-41 Leading the protection tube and crimping sleeve
Protection tube
of the connector
Crimping
sleeve
Step 3 Unfold the external conductor of the coaxial cable into a trumpet shape, as shown in Figure
3-42.

NOTE
External conductor
Step 4 Insert the insulation layer and internal conductor into the connector of the coaxial cable. The
external conductor of the coaxial cable partly wraps the external conductor of the connector,
as shown in Figure 3-43.
Figure 3-43 Inserting the coaxial connector into the coaxial cable
Connector
conductor of the coaxial connector, as shown in Figure 3-44.

Internal conductor
Welding
cable tight. Use a crimping tool to tighten the crimping sleeve and the coaxial cable connector.
See Figure 3-45. In this way, the straight L9-M male connector is assembled with the coaxial
cable.
NOTE
Crimping 1
sleeve
----End
3.9.1.3 Assembling the Straight SMB Female Connector with the Coaxial Cable
This section describes how to assemble the straight BNC female connector with the coaxial
cable.
Prerequisites
None

Wire stripper

Straight SMB female connector, whose components are shown in Figure 3-46.
Figure 3-46 Straight SMB female connector and coaxial cable
Crimping sleeve
Connector
Protection tube of
the coaxial cable
External conductor
Insulation layer of
the coaxial cable
Internal conductor
Procedure
be exposed. See Figure 3-47. Table 3-16 lists the recommended length of the reserved
external conductor (L1), reserved insulation layer (L2) and stripped sleeve (L3). Then, twist
the external conductors of the coaxial cable as one.
External conductor
Insulation layer of
Protection tube of
the coaxial cable
the coaxial cable
Internal conductor of L1
the coaxial cable
L2
L3

l You can also determine the stripping size according to the size of the connector, as shown
in Figure 3-48.

Type Diameter
Label for of the
the NM Coaxial
cable Cable
SYFVZP- 1.6 mm 5-6 7-9 10-12 -

MC 75-1-1
SYFVZ-75- 2.2 mm 5-6 7-9 10-12 -

1-1(A)
SYV-75-2- 3.9 mm 5-6 7-9 10-12 National

2 trunk 155M-
I
SYV-75-4- 6.7 mm 5-6 7-9 10-12 National

2 trunk 155M-
III
SFYV-75-2 3.2 mm 5-6 7-9 10-12 National

-1 trunk -II
SFYV-75-2 4.4 mm 5-6 7-9 10-12 National

-2 trunk 155M-
II
Figure 3-48 Size of the connector and the stripping size of the coaxial cable
L1 L1
L2 L2
L3 L3
Step 2 Lead the crimping tube through the coaxial cable, as shown in Figure 3-49.

Figure 3-49 Leading the crimping sleeve
Protection tube of
the coaxial cable
Crimping
sleeve
Step 3 Unfold the external conductor of the coaxial cable into a trumpet shape, as shown in Figure
3-50.
NOTE
External conductor of
the coaxial cable
Step 4 Insert the insulation layer and internal conductor into the connector of the coaxial cable. The
external conductor of the coaxial cable partly wraps the external conductor of the connector as
Figure 3-51 Inserting the coaxial connector into the coaxial cable
Connector

conductor of the coaxial connector, as shown in Figure 3-52.

Internal conductor
Connector
Welding
cable tight. Use the crimper to tighten the crimping sleeve and the coaxial cable connector, as
shown in Figure 3-53. In this way, the straight SMB female connector is assembled with the
coaxial cable.
NOTE
Crimping
sleeve
----End
3.9.1.4 Testing Cable Connectivity

This section describes how to test the cable connectivity by using a multimeter.

Prerequisites
During the process of routing or bundling cables, and installing the connector, the circuit on
the cable may become open or broken. Hence, after the preceding procedures are completed,
test the connectivity of cables.

Multimeter
In this section, the cable has a Anea 96 connector at one end and a group of SMB connectors
at the other, as shown in Figure 3-54. This section describes how to test the cable
connectivity by using a multimeter.
Procedure
Step 1 Set the multimeter to the resistance gear.
Step 2 On the SMB connector side, connect the two probes of the multimeter to the internal and
external conductors respectively.
Step 3 According to the pin sequence table of the connector, use a shorting stub to cause a short
circuit between the two pins corresponding to the SMB connectors. See Figure 3-54.
Figure 3-54 Testing table connectivity
R0
Short circuit pin

No.25 and 26
DDF side Chassis side
Step 4 Observe the multimeter, which should read 0 ohms.

Step 5 Remove the shorting stub from the connector. Observe the multimeter, which should read
resistance of infinite ohms.
Step 6 Repeat Steps 2–5 to test the other SMB connectors.
----End

3.9.2 Assembling the RJ45 connector with the Ethernet Cable and
Testing the Connectivity
This section describes how to assemble the RJ45 connector with the shielded Ethernet cable
or non-shielded Ethernet cable, and how to test the cable connectivity and network cable
connection.
3.9.2.1 Connection Relations of Network Cables

The commonly used network cables are classified into straight through network cables and
crossover network cables based on the different pin assignments.
Figure 3-55 shows the pin assignment of the straight through network cables.
Figure 3-55 Pin assignment of the straight through network cables

Connector X1 Connector X2
White or White or
Pin 1 orange orange Pin 1
Pin 2 Orange Orange Pin 2
White or White or
Pin 3 Pin 3
green green
Pin 4 Blue Blue Pin 4
White or White or
Pin 5 blue blue Pin 5
Pin 6 Green Green Pin 6
White or White or
Pin 7 Pin 7
brown brown
Pin 8 褐色
Brown Brown Pin 8
Table 3-19 lists the pin assignment of the straight through network cables.
Table 3-19 Pin assignment of the straight through network cables
Connector Connector X2 Color Relation

X1
X1.1 X2.1 White or orange Twisted pair
X1.2 X2.2 Orange
X1.3 X2.3 White or green Twisted pair
X1.6 X2.6 Green
X1.4 X2.4 Blue Twisted pair
X1.5 X2.5 White or blue
X1.7 X2.7 White or brown Twisted pair


X1
X1.8 X2.8 Brown
Figure 3-56 shows the pin assignment of the crossover network cables.
Figure 3-56 Pin assignment of the crossover network cables

Connector X1 Connector X2
White or White or
Pin 1 orange green Pin 1
Pin 2 Orange Green Pin 2
White or White or
Pin 3 orange Pin 3
green
Pin 4 Blue Blue Pin 4
White or White or
Pin 5 blue blue Pin 5
Pin 6 Green Orange Pin 6
White or White or
Pin 7 Pin 7
brown brown
Pin 8 褐色
Brown Brown Pin 8
Table 3-20 lists the pin assignment of the crossover network cables.
Table 3-20 Pin assignment of the crossover network cables

X1
X1.6 X2.2 Orange Twisted pair
X1.3 X2.1 White or orange
X1.1 X2.3 White or green Twisted pair
X1.2 X2.6 Green
X1.4 X2.4 Blue Twisted pair
X1.5 X2.5 White or blue
X1.7 X2.7 White or brown Twisted pair
X1.8 X2.8 Brown
Figure 3-57 shows the pin assignment of the RJ45 connector.

Figure 3-57 Pin assignment of the RJ45 connector
Pin8
Pin1
3.9.2.2 Assembling the RJ45 connector with the Shielded Ethernet Cable
This section describes the materials of the RJ45 connector for the shielded Ethernet cable and
the procedures of assembling the RJ45 connector with the shielded Ethernet cable.
Prerequisites
None

Cable peeler, cable cutter and crimper
Shielded Ethernet cable, whose components are shown in Figure 3-58.
Shielded Ethernet connector, whose components are shown in Figure 3-58.
Figure 3-58 Components of the shielded RJ45 connector
B
C
D
E
F
G
A Connector external sleeve B Connector metal sleeve C Connector cable tray D Connector plug
E Network cable sleeve F Network cable shield layer G Twisted pair cable

Procedure
Step 1 Lead the network cable through the connector external sleeve A, as shown in Figure 3-59.
Figure 3-59 Leading the network cable through the connector external sleeve
Step 2 Strip a 300 mm length of the external sleeve E and cut the nylon rip cord inside the external
sleeve. Make a 5 mm cut on the cable external sleeve, as shown in Figure 3-60.
Figure 3-60 Stripping the external sleeve of the twisted pair cable
E
Max.5
30.0
l When stripping the sleeve of the twisted pair cable, do not scratch the shield layer.
l When stripping the shield layer, do not scratch the insulation layer covering the twisted
cores.
Step 3 Lead the connector metal sleeve B through the twisted pair cable. The sleeve should envelop
the shield layer F, as shown in Figure 3-61.

Figure 3-61 Leading the connector metal sleeve
Step 4 Lead the connector metal sleeve to the root of the twisted pair cable sleeve. Cut the shield
layer and aluminum foil straight along the edge of the metal sleeve without leaving any
aluminum wires. Expose the twisted pair G, which is about 20 mm long, as shown in Figure
3-62.
Figure 3-62 Stripping the shield layer of the twisted pair cable
20.0
Step 5 Lead the four pairs of twisted cables, which are marked in different colors, through the
connector cable tray C respectively according to the colors. See Figure 3-63 and Figure 3-64.
Figure 3-63 Leading twisted pair cables through connector cable tray

Figure 3-64 Colors of cores in the cable tray
White-Orange
Orange
White-Green Blue
Green White-Blue
White-Brown
Brown
Step 6 Align the four pairs of twisted cables G on the connector cable tray C according to the
illustrated colors. See Figure 3-65 and Figure 3-66.
Figure 3-65 Aligning the four pairs of twisted cables on the connector cable tray
G C
Figure 3-66 Alignment of cores in different colors on the cable tray

White-Orange
Orange
White-Green
Blue
White-Blue
Green
White-Brown
Brown

Step 7 Cut the cables straight along the edge of the connector cable tray C, as shown in Figure 3-67.
Figure 3-67 Cutting the cables
G C
Step 8 Lead the connector cable tray through the connector body D, and rotate the metal shield shell
90 degree to push the cable tray inward, as shown in Figure 3-68.
Figure 3-68 Inserting the cable tray through the connector body
Make sure the connector cable tray is inserted to the bottom of the connector body.
Step 9 Move the connector metal shell B toward the connector body to envelop the connector body
and connector cable tray. Then, use the crimper to crimp the connector, as shown in Figure
3-69.

Figure 3-69 Crimping the connector
Step 10 Move the connector external sleeve A toward the connector body until the external sleeve A
hitches the connector metal shell. Then, the cable components at one end are made. See
Figure 3-70.
Figure 3-70 Hitching the connector external sleeve
Step 11 A network cable may be either a crossover cable or a straight-through cable. Which
operations should be performed at the other end depends on the network cable type.
l To assemble a straight-through cable, repeat Steps 1-10 to make the cable components at
the other end.
l To assemble a crossover cable, perform the following operations.
a. Repeat Steps 1-4.
b. Repeat Steps 5-6. In Steps 5-6, for the wire sequence, refer to the mapping relation
of the crossover cables in Table 3-20.
c. Repeat Steps 7-10 to make the cable components at the other end.
----End
3.9.2.3 Assembling the RJ45 connector with the Non-Shielded Ethernet Cable
This section describes the materials of the RJ45 connector for the non-shielded Ethernet cable
and procedures of assembling the RJ45 connector with the non-shielded Ethernet cable.

Prerequisites
None

Cable peeler, cable cutter and crimper
Non-shielded Ethernet cable, whose components are shown in Figure 3-71.
Non-shielded Ethernet connector, whose components are shown in Figure 3-71.
Figure 3-71 Material components
A Connector plug B Sleeve C Twisted pair cable
Procedure
Step 1 Strip the twisted pair cable according to the illustrated size and cut a 16 mm length off the
sleeve, as shown in Figure 3-72.
Figure 3-72 Stripping the twisted pair cable
.0
16 B
Step 2 Align the twisted pairs in sequence and match the colors according to Figure 3-73. Cut the
ends of the twisted pairs straight.

Figure 3-73 Aligning the stripped twisted pair cable
C
White-Orange
Orange
White-Green
Blue
White-Blue
Green
White-Brown
Brown
16
l When stripping the sleeve of the twisted pair cable, do not scratch the shield layer.
l When stripping the shield layer, do not scratch the insulation layer covering the twisted
cores.
Step 3 Insert the cable B with the aligned twisted pairs into the connector plug A and crimp the
connector with a crimper, as shown in Figure 3-74.
Figure 3-74 Crimping the connector
Step 4 A network cable may be either a crossover cable or a straight-through cable. Which
operations should be performed at the other end depends on the network cable type.
l To assemble a straight-through cable, repeat Steps 1-3 to make the cable components at
the other end.
l To assemble a crossover cable, perform the following operations.
a. Repeat Step 1.
b. Repeat Step 2. In Step 2, for the wire sequence, refer to the mapping relation of the
crossover cables in Table 3-20.
c. Repeat Step 3 to make the cable components at the other end.
----End
3.9.2.4 Checking the Assembled Cable Connector

This section describes how to check the assembled cable connector.

Prerequisites
None

None
Checking the Physical View of the Metal Contact Slices

The checking standards are listed as follows:
l The metal contact slices should be of the same height and are of the required sizes. The
crimp part should properly contact the core conductor.
l The metal contact slices should be basically parallel with a deviation of not more than
five degrees. The top edges should be basically parallel with the axes of the RJ45
connector with a deviation of not more than 10 degrees. This ensures reliable contact.
l No perceptible object, dirt or rust should be present on the surface of the metal contact
slice. Otherwise, the conductivity is affected.
l The metal contact slices should reliably contact the RJ45 connector socket. The plastic
spacers should remain the same before and after the crimping, and should have the same
spacing between each other. Each of them should be straight and intact.
l The crimping blade of the metal contact slice should exceed the core end. The core end
should tightly contact the trunking side of the RJ45 connector. The contact spacing
should not exceed 0.5 mm.
Procedure
Step 1 Hold the crimped RJ45 connector and observe the side from the front. Check the height of
each metal contact slice. The standard height is 6.02 mm ± 0.13 mm. If no special test
instrument is available on site, compare the RJ45 connector with another well crimped RJ45
connector. Figure 3-75 and Figure 3-76 show an unqualified RJ45 connector and a qualified
RJ45 connector respectively.
Figure 3-75 Metal contact slices of inconsistent height

Figure 3-76 Metal contact slices of consistent height
NOTE
If the RJ45 connector does not meet the requirement, crimp the RJ45 connector again and make sure the
RJ45 connector meets the requirement.
Step 2 Hold the RJ45 connector and slant it to a 45-degree angle. Side-glance the top edge of each
metal contact slice. Figure 3-77 an unqualified RJ45 connector.
Figure 3-77 Metal contact slices of inconsistent parallelism and height
Step 3 Hold the RJ45 connector. Observe the side and front of the metal contact slice, and check for
any perceptible object, dirt or rust. Remove the perceptible object, dirt or rust, if there is any.
If the removal fails, replace RJ45 connector and assemble the connector again. Otherwise, the
connector is unqualified. See Figure 3-78.
Figure 3-78 Metal contact slices with perceptible object, dirt or rust on the surface

Step 4 Hold the RJ45 connector. Observe the side and front of the metal contact slices, and observe
the plastic spacers. Make sure they are intact and do not tilt. If they tilt or are not intact,
rectify the RJ45 connector. If the rectification fails, replace the RJ45 connector and assemble
the connector again. Otherwise, the connector is unqualified. See Figure 3-79.
Figure 3-79 RJ45 connector with tilted plastic spacers
Step 5 Hold the RJ45 connector and observe the side to check whether you can see the core section.
Make sure that the end of the cable core is close to the face of the cable trough of the
connector. The metal contact should be higher than the end of the cable core, and be properly
crimped to the cable core. If the RJ45 connector does not meet this requirement, replace the
RJ45 connector and assemble the connector again. Otherwise, the RJ45 connector is intact.
See Figure 3-80.
Figure 3-80 Cable core not pushed to the proper position
No exposed cross-sections of core wires
----End
3.9.2.5 Testing Cable Connectivity

This section describes how to test the connectivity of the Ethernet cable by using the network
cable tester.
Prerequisites
During the process of routing or bundling cables, and assembling the connectors, the circuit
on the cable may become open or broken. Hence, after the preceding procedures are
completed, test the connectivity of the cable.


Network cable tester
Assembled network cable
You can also use a multimeter to test the connectivity of the network cable according to the
core connections. For details, see 3.9.1.4 Testing Cable Connectivity.
Procedure
Step 1 Insert the RJ45 connectors at the two ends of the assembled network cable into the RJ-45
female ports of the network cable tester in sequence.
Step 2 Make sure the RJ45 connectors are inserted properly. Turn on the network cable tester and
start the test. In the case of the crossover cable and straight through network cable, the test
procedures are the same but the indicators at the two ends turn on in different sequences. Test
the crossover cable according to the core connections.
l In the case of the straight through network cable, the indicators at points 1, 8 and G turn
on in sequence. This indicates that the connectivity is fine and core connections are
correct.
l In the case of the crossover cable, the indicators at points 1, 8 and G of the main end turn
on in sequence, and the indicators at points 3, 6, 1, 4, ,5 2, 7, 8 and G of the subsidiary
end turns on in sequence. This indicates that the connectivity of the crossover cable is
proper.
NOTE
Turn the switch to position S to extend the interval for indicators to turn on. In this way, you can observe the
change more accurately. See Figure 3-81.
Figure 3-81 Testing the connectivity

Step 3 Slightly shake the RJ45 connector of the assembled network interface and repeat Step 2.
Make sure that each metal contact slice of the RJ45 connector reliably contacts the core and
contacts the contact point of the female network port of the network cable tester.
----End
3.9.3 Assembling Power Cables

This section describes how to assemble the OT terminals and cord end terminals of power
cables.
3.9.3.1 Assembling OT Terminals and Power Cables

This section briefs the components of ring terminals and power cables, and describes the
procedure for assembling them.
Prerequisites
none.

Cable peeler
Heat gun
The components of ring terminals and power cables are shown inFigure 3-82.
Figure 3-82 Components of a ring terminal and a power cable
A Heat shrink tube B Ring terminal C Insulation layer of power cable D Conductor of power cable
Procedure
Step 1 Peel a part of the insulation layer C of a power cable according to the cross-section of the
cable conductor. The conductor D with length L1 appears, as shown in Figure 3-83. The
recommended values of L1 are shown in Table 3-21.

Figure 3-83 Peeling a power cable

L
C
L1
l When peeling the insulation layer of a power cable, do not hurt the metal conductor of the
cable.
l If the bare press-fitting terminal is not provided by Huawei, adapt the value of L1
according to the actual value L of the terminal. L1 = L + (1-2) mm.
Table 3-21 Cross-sectional area of the conductor and value of L1

Cross-Sectional Area of Value of L1(mm)
Conductor(mm2)
1, 1.5, 2.5 7
4 8
6 9
10 11
16 13
Step 2 Put the power cable into heat shrink tubing A, as shown in Figure 3-84.
Step 3 Put the cable conductor into a ring terminal. And keep the ring terminal close to the insulation
layer C of the power cable, as shown in Figure 3-84.

Figure 3-84 Inserting the cable conductor into the ring terminal
L2
C
After the conductor is put into the ring terminal, the L2 part will extrude. The value of L2
should be less than or equal to 2 mm.
Step 4 As shown in Figure 3-85, press-fit the joint parts of the bare press-fitting terminal and the
conductor by a press-fitting tool.
Figure 3-85 Press-Fitting joint parts of a bare press-fitting terminal and a conductor
NOTE
The shapes of press-fit parts may vary with the types of the press-fitting dies.
Step 5 Push the heat shrink tubing A towards the connector till the tube covers the press-fit part.
Heat the heat shrink tubing using a heat gun, as shown in Figure 3-86.

Figure 3-86 1-5 Heating a heat shrink tubing
Do not heat the heat shrink tubing for too long time. Otherwise, the insulation layer may be
damaged.
----End
3.9.3.2 Assembling Cord End Terminals and Power Cables

This section briefs the components of cord end terminals and power cables, and describes the
procedure for assembling them.
Prerequisites
none.

Cable peeler
Cord end terminal crimper are shown in Figure 3-87.
The components of cord end terminals and power cables are shown in Figure 3-88.
Figure 3-87 Cord end terminal crimper

Figure 3-88 Components of a cord end terminal and a power cable
B
C
A
A Cold soldering terminal B Insulation layer of power cable C Conductor of power cable
Procedure
Step 1 Peel a part of the insulation layer B of a power cable according to the cross-sectional area of
the cable conductor. The conductor C with length L1 appears, as shown in Figure 3-89. The
recommended values of L1 are shown in Table 3-22.
Figure 3-89 Peeling a power cable
L1
B
C
A
When peeling the insulation layer of a power cable, do not hurt the metal conductor of the
cable.

Table 3-22 Cross-sectional area of the conductor and value of L1

Cross-sectional Area of Conductor Value of L1(mm)
(mm2)
1, 1.5, 2.5 7
4 8
6 9
10 11
16 13
Step 2 Put the cable conductor into the cord end terminal A. Align the conductor with the edge of the
cord end terminal, as shown in Figure 3-90.
Figure 3-90 Putting a cable into a cord end terminal
After the cord end terminal is assembled, the exposed part of the conductor should not be
more than 1 mm.
Step 3 Press-fit the joint parts of the cord end terminal and the conductor using soldering tool, as

Figure 3-91 Press-Fitting a cord end terminal and a power cable
Rough Flat
Step 4 After press-fitting the terminal, check the maximum width of the press-fit part. The width of
the tubular terminal after press-fit should be less than the maximum width described in Table
3-23
Table 3-23 Maximum width of tubular terminal after press-fit

Cross-Sectional Area of Tubular Maximum Width of Terminal after
Terminal(mm2) Press-Fit(mm)
0.25 1
0.5 1
1.0 1.5
1.5 1.5
2.5 2.4
4 3.1
6 4
10 5.3
16 6
----End

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NE05E&NE08E Mid-End Router

HUAWEI TECHNOLOGIES CO., LTD.

Trademarks and Permissions

Huawei Technologies Co., Ltd.

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. i

1 Equipment Installation Process.................................................................................................. 1

3 General Installation Guidelines............................................................................................... 42

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. ii

3.1.1 Unpacking the Chassis...............................................................................................................................................43

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. iii

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. iv

1 Equipment Installation Process

Table 1-1 Equipment installation process

Before installation, plan installation space, build

When a project starts, the project supervisor needs to work

The installation modes for chassis vary with installation

Generally, chassis for delivery have boards installed. If

The installation modes for fibers and cables in chassis vary

After hardware installation is complete, check the installation

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. 1

Installation Process Description

Before powering on the equipment, check the external power

During installation of fiber jumpers, the fiber jumpers may

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. 2

About This Chapter

Table 2-1 Running environment and installation modes

Running Indoor The For details on

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. 3

Room where temperature

temperature and Simple

Public area inside a

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. 4

2.1 Requirements for Running Environment A and Installation Planning

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. 5

2.1 Requirements for Running Environment A and

2.1.1 Equipment Room Environment Requirements

2.1.2 Layout of Equipment Room

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. 6

Figure 2-1 Layout of the equipment room

Service Console Control Room Diesel Room

Transmission Room Transformer Room

The principles for layout of the equipment room are as follows:

2.1.3 Construction of the Equipment Room

Table 2-2 Construction requirements for the equipment room

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. 7

Load-bearing >450 kg/m2

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. 8

Other In addition to the rodent-proof measures (for example, measures

Figure 2-2 Internal partition wall of the equipment room

2.1.4 Cleanliness of the Equipment Room

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. 9

Table 2-3 Mechanical active substance

Suspended dust ≤ 0.4 mg/m3

Deposited dust ≤ 15 mg/(m2·h)

Gravel ≤ 300 mg/m3

To meet the above requirements, take the following measures:

2.1.5 Temperature and Humidity

2.1.6 Corrosive Gas Control Requirements

Issue 01 (2018-12-05) Copyright © Huawei Technologies Co., Ltd. 10