Tunable Optical Amplification and Dispersion

Compensation-Free 120 km reach with Menara OTN

SFP+ Transceiver
Management
Management of the Tunable OTN SFP+ is provided
2
via the SFP+ MSA I C interface, which supports
digital diagnostic monitoring, alarms and loop backs
to include G.709 and FEC management registers and
Description wavelength tuning. Routers and Switches can reap
Menara Networks 120 km OTN SFP+ DWDM transceiver the performance gains of FEC without changes to the
combines carrier grade OTN G.709 framing and FEC 2
existing I C interface in a management Transparent
performance into a SFP+ MSA compliant package. Mode of operation, in which the Tunable OTN SFP+
Menara’s 120 km OTN SFP+ is the only industry SFP+ activates the G.709 Digital Wrapper and FEC coding
MSA that can transparently carry a native 10G LAN PHY 2
without the need for specific I C provisioning.
and SONET/SDH payload with a carrier grade DWDM
Optical Transport Network (OTN) interface without the Applications
need for bandwidth limitation over a 120 km reach on  Passive Data Center Interconnection up to 120
standard G.652 fiber without the need for optical km without the need for optical EDFA
amplification or dispersion compensation. The Menara 120 amplifiers or dispersion compensation
km OTN SFP+ combines a G.709 compliant Digital  Metro and Regional Optical networks
Wrapper and Forward Error Correction (FEC) with an M-Z  IP/MPLS and Ethernet Switches
modulated laser for superior optical performance and  Customer Premise Ethernet Demarcation
management functions equal to those found in external
Features
DWDM Transponder systems. The OTN SFP+ offers a
 Error-free performance on up to 120 km
complete and cost effective DWDM transport for IP, MPLS,
Reach (up to 2,000 ps/nm dispersion) on
and Ethernet applications.
Standard SMF Fiber without optical
amplification or dispersion compensation
Menara OTN SFP+ G.709 digital wrapper overhead and
for point to point applications
E-FEC functions are handled by the OTN Processor,
 SFP+ MSA compliant with Integrated OTN
which is integrated into the SFP+ module. The OTN
G.709 Digital Wrapper
Processor provides Operations Administration and
 8.0dB Net Coding Gain E-FEC for superior
Management (OAM) functions with G.709 alarms and
optical performance
Performance Management statistics.
 6.2dB Net Coding Gain G-FEC
 wavelengths (SFF-8477 Control)
 Multi-protocol and bit rate support for 10GE,
OC-192/STM-64, 10G FC and OTN
 Fully transparent 10G LAN PHY OTU2e at
11.09 Gbps
 Adaptive Receiver Decision Threshold Control
for improved OSNR range
 True link BER reporting and Integrated PRBS
10 Gbps BERT for test set free link turn-up
 OTN Digital diagnostics and alarm reporting

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Transceiver Optical Specifications (G.709 and FEC Enabled)
Parameter Symbol Min Typical Max Units
9.9533 (SONET/SDH)
Host Native Nominal Bit Rate
10.3125 (LAN PHY) Gbps
10.7092 (OTU2)
DWDM Line Interface Bit Rate Gbps
11.0957 (OTU2e LAN PHY)
+/- 20 (SONET)
OTN Interface Bit Rate Deviation ppm
+/- 100 (LAN PHY)
DWDM Frequency Range (Ch 59, 59.5, 60,
λWDM 195.9 - 196.05 THz
60.5)
Channel Spacing fSPACING 50 GHz
Laser Tuning Range fTUNE Full C-band
Wavelength Accuracy λEOL -25 - +25 pm
Extinction Ratio ER 6 - - dB
Side Mode Suppression Ratio SMSR 35 - - dB
Average Output Power POUT -1 - +3 dBm
Eye Mask Compliance GR-253i3/G.959.1
Receiver Operating Range @ 11.1Gbps
0 to 2000 ps/nm -29 -6 dBm
Rx Sensitivity @ 2000 ps/nm -29 dBm
Rx Power Warning/Alarm Level - -27/-29 dBm

OSNRmin @ 1796 ps/nm OSNRMIN -

14 dB/0.1nm
(Pin from -5 dBm to -18 dBm) (80km APD) -

Jitter Compliance - 802.3ae/GR-253i3

Power Consumption 3.0 W
Rx Power Monitor Accuracy -3 +3 dB
Temperature Measurement Accuracy -4 +4 °C
LOS De-Assert -28 dBm
LOS Assert -37 dBm
Hysteresis 0.5 dB

Absolute Maximum Ratings

Parameter Voltage Min Max Unit
+3.3V Current 3.3 1000 mA
+3.3V Power 3.3 W
Total Module Power 3.3 W
Power Supply Voltage -0.5 3.6 V
Operating Case Temperature -5 70 °C
Storage Temperature -40 85

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Compliance
 SFF-8431 Rev 4.1 – SFP+ High Speed Electrical Interface
 SFF-8472 Rev 11.3 – Diagnostics Monitoring Interface for Optical Transceivers
 SFF-8690 Rev 1.4 – Tunable SFP+ Memory Map for ITU Frequencies
 Class 1 Laser Safety
 ROHS3 (10/10)

PRBS-31 “True Link” Pattern Generator and Checker

The OTN SFP+ “True Link” feature consists of a PRBS-31 Generator and Checker to allow the customer to determine the
11Gbps channel performance without the need for costly 10GE or OC-192 payload test equipment. In the transmit direction a
PRBS-31 pattern is generated and inserted into the OTU-2 payload portion of the frame. The OTU-2, ODU-2 and FEC data is
generated and monitored normally to allow for link alarming and FEC correction performance monitoring. A status bit is
provided to the user to denote PRBS-31 pattern synchronization. In the receive direction, the PRBS-31 payload is decoded and
2
checked for individual bit level errors. A PRBS-31 payload error counter is provided via the OTN SFP+ standard I C interface.

2
The following I C registers are used for the True Link feature:

Title
Page Reg Bit Type Description Settings
1 = Reset PRBS-31 error counter
R/W, PRBS-31 error counter reset (This bit is self clearing back to zero)
03h 183 7 SC (Self Clearing Bit) 0 = Normal operation.
03h 183 5:6 R/W Reserved
0 = PRBS-31 Rx pattern sync
present
03h 183 4 RO PRBS31 sync status 1 = PRBS-31 Rx pattern sync error
03h 183 2:3 R/W Reserved
PRBS31 1 = Enable PRBS31 payload read in
Control the Rx direction. If FEC enabled,
(Line Side) PRBS31 is error corrected. If FEC
is off, PRBS1 raw data is sent.
Enable PRBS31 pattern on 0 = Disable PRBS31 payload read
03h 183 1 R/W Rx Path in the Rx direction.
1 = Enable PRBS31 payload
insertion in the Tx direction. The Tx
direction PRBS data is inserted as
the payload data in the OTU2 frame.
Enable PRBS31 pattern on 0 = Disable PRBS31 payload
03h 183 0 R/W Tx Path insertion in the Rx direction.

Title
Page Reg Bit Type Description Settings
PRBS31 Error Counter (MSB-
03h 184 7:0 RO 32 bit counter) PRBS31 Error Count (MSB- 32 bit)
PRBS31 Error Counter (17 to PRBS31 Error Count (17 to 24 of 32
03h 185 7:0 RO PRBS31 24 of 32 bit counter) bit counter).
Checker
(Line Side) PRBS31 Error Counter (8 to PRBS31 Error Count (8 to 16 of 32
03h 186 7:0 RO 16 of 32 bit counter) bit counter)
PRBS31 Error Counter (LSB-
03h 187 7:0 RO 32 bit counter) PRBS31 Error Count (LSB- 32 bit).

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Link Checker Feature
The OTN SFP+ has the optional “Link Checker” feature, allowing the customer to proactively monitor the link performance
margin in real time locally or remotely. Link Checker provides proactive alarms to alert the customer of a link falling below a pre-
defined margin threshold, triggering an investigation of the optical layer to rectify the degradation before the customer takes
errors. The user monitors Laser Bias Current to verify the health or margin on the OTN wavelength. The Link Checker margin
can vary between 3 and 12, in which the higher the number the higher the margin. This is illustrated in the graph below.

As seen an OTN SFP+ DWDM channel with a Link Checker reading of 6 or higher is operating with a good operating margin.
Between 4 and 6 the link margin is low and may be the indicator of a link problem on the DWDM system. At 4 or below traffic is
affected or down on that link.

The link margin is supported through the reading of the FEC Correction Error Rate (FCER) in the SFP+ and displaying that
margin as the Laser Bias Current value on the router. The FEC correction error rate is averaged over a 25 second rolling
window by the module software. In the case of failure or no errors being corrected, the correction error rate is shown as 12.

The transposition of the correction error rate to laser bias current is shown below:
The FEC Correction BER can be represented as:
xx = Mantissa yy = Exponent
-6
For example, an error correction error rate of 3x10
where the Mantissa xx = 3 and the Exponent yy = 6

The Laser Bias Current on the router is then shown as = yy.xx mA

-6
Therefore a FEC Correction Error Rate (FCER) of 3x10 is shown as a Laser Bias current of 6.3 mA
Any error rate <10-5 will raise a Laser Bias Low Alarm in the system, which is an early warning indicator to the NOC to
proactively monitor and correct for a degraded link before errors are seen by the customer.

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OTN Alarm Register
This register is used to differentiate an LOS Alarm that is asserted due to a Loss of Signal versus an LOS Alarm that is asserted
to indicate an OTN Alarm. When LOS is asserted due to an OTN Alarm, the register value is set to 1. When LOS is asserted
due to loss of signal, the register value is set to 0.

Title
Page Reg Bit Type Description Settings

04h 133 7 RO OTN Alarm Register denoting OTN Alarm 0 = No OTN Alarm Present
1 = OTN Alarm Present

Laser Safety

OTN SFP+ is compliant to IEC 60825-1 laser safety. The DWDM laser output is specified as a Class 1 output power as defined
in IEC 60825-1, ed 2.0 2007.

CAUTION – Use of controls or adjustments or performance of procedures other than those specified herein may result in
hazardous radiation exposure.

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Host Connector Specifications

The SFP+ PCB host electrical connections are shown in the figure below.

SFP+ PCB Electrical Connections

Contact Logic Symbol Power Name/Description Note

Sequence
case case See 1 Module case
1 VeeT 1st Module Transmitter Ground 2
2 LVTTL-O Tx_Fault 3rd Module Transmitter Fault 3
3 LVTTL-I Tx_Disable 3rd Transmitter Disable; Turns off transmitter 4
laser output
4 LVTTL- SDA 3rd 2-wire Serial Interface Data Line
I/O
5 LVTTL- SCL 3rd 2-wire Serial Interface Clock
I/O
6 Mod_ABS 3rd Module Absent
7 LVTTL-I RS0 3rd Rate Select 0 (Not used)
8 LVTTL-O Rx_LOS 3rd Receiver Loss of Signal Indication 3
9 LVTTL-I RS1 3rd Rate Select 1 (Not used)
10 VeeR 1st Module Receiver Ground 2
11 VeeR 1st Module Receiver Ground 2
12 CML-O RD- 3rd Receiver Inverted Data Output
13 CML-O RD+ 3rd Receiver Non-Inverted Data Output
14 VeeR 1st Module Receiver Ground 2
15 VccR 2nd Module Receiver 3.3 V Supply
16 VccT 2nd Module Transmitter 3.3 V Supply
17 VeeT 1st Module Transmitter Ground 2
18 CML-I TD+ 3rd Transmitter Non-Inverted Data Input
19 CML-I TD- 3rd Transmitter Inverted Data Input
20 VeeT 1st Module Transmitter Ground 2
1. The case makes electrical contact to the cage before any of the board edge contacts are made.
2. The module signal ground contacts, VeeR and VeeT, should be isolated from the module case.
3. This contact is an open collector/drain output contact and shall be pulled up on the host.
4. Tx_Disable is an input contact with a 4.7 kΩ to 10 kΩ pullup to VccT inside the module.

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Physical Dimensions (mm)

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Wavelengths Supported
The following table provides correlation of the ITU-T DWDM wavelength and frequency as it relates to Menara Networks ID.
Frequency Wavelength Menara ID Frequency Wavelength Menara ID
196.05 1529.16 60.5 193.75 1547.32 37.5
196.00 1529.55 60 193.70 1547.72 37
195.95 1529.94 59.5 193.65 1548.11 36.5
195.90 1530.33 59 193.60 1548.51 36
195.85 1530.72 58.5 193.55 1548.91 35.5
195.80 1531.12 58 193.50 1549.32 35
195.75 1531.51 57.5 193.45 1549.72 34.5
195.70 1531.90 57 193.40 1550.12 34
195.65 1532.29 56.5 193.35 1550.52 33.5
195.60 1532.68 56 193.30 1550.92 33
195.55 1533.07 55.5 193.25 1551.32 32.5
195.50 1533.47 55 193.20 1551.72 32
195.45 1533.86 54.5 193.15 1552.12 31.5
195.40 1534.25 54 193.10 1552.52 31
195.35 1534.64 53.5 193.05 1552.93 30.5
195.30 1535.04 53 193.00 1553.33 30
195.25 1535.43 52.5 192.95 1553.73 29.5
195.20 1535.82 52 192.90 1554.13 29
195.15 1536.22 51.5 192.85 1554.54 28.5
195.10 1536.61 51 192.80 1554.94 28
195.05 1537.00 50.5 192.75 1555.34 27.5
195.00 1537.40 50 192.70 1555.75 27
194.95 1537.79 49.5 192.65 1556.15 26.5
194.90 1538.19 49 192.60 1556.55 26
194.85 1538.58 48.5 192.55 1556.96 25.5
194.80 1538.98 48 192.50 1557.36 25
194.75 1539.37 47.5 192.45 1557.77 24.5
194.70 1539.77 47 192.40 1558.17 24
194.65 1540.16 46.5 192.35 1558.58 23.5
194.60 1540.56 46 192.30 1558.98 23
194.55 1540.95 45.5 192.25 1559.39 22.5
194.50 1541.35 45 192.20 1559.79 22
194.45 1541.75 44.5 192.15 1560.20 21.5
194.40 1542.14 44 192.10 1560.61 21
194.35 1542.54 43.5 192.05 1561.01 20.5
194.30 1542.94 43 192.00 1561.42 20
194.25 1543.33 42.5 191.95 1561.83 19.5
194.20 1543.73 42 191.90 1562.23 19
194.15 1544.13 41.5 191.85 1562.64 18.5
194.10 1544.53 41 191.80 1563.05 18
194.05 1544.92 40.5 191.75 1563.45 17.5
194.00 1545.32 40 191.70 1563.86 17
193.95 1545.72 39.5 191.65 1564.27 16.5
193.90 1546.12 39 191.60 1564.68 16
193.85 1546.52 38.5 191.55 1565.09 15.5
193.80 1546.92 38 191.50 1565.50 15
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Ordering Guide
Part Number Feature Description
TEZ3ffrr- TNBL OTN SFP+, Full C-band Tunable, OTN OTU2 Integrated Framer with G.975 FEC,
Default FW Config, ITU-T Channel 16.0 Default Wavelength, APD Receiver, 9.9Gb/s
Host Speed
TEZ1ffrr-TNBL OTN SFP+, Full C-band Tunable, OTN OTU2e Integrated Framer with G.975 FEC,
Default FW Config, ITU-T Channel 16.0 Default Wavelength, APD Receiver,
10.3Gb/s Host Speed

ff= module firmware configuration

rr= router coding ie. 0U= uncoded; 1C= Cisco ASR; 0J=Juniper etc.
Default Channel is 60.5.

The OTN SFP+ Tuning Cable and GUI part number is shown below.
Part Number Description
500006A-CBL OTN SFP+ Tuning Cable, OTN GUI software, wall mount power supply

menarainfo@menaranet.com

Specifications are subject to change.

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