JPH06300808A - Method for inspecting cable wiring - Google Patents

Abstract

PURPOSE:To provide a method for inspecting cable wiring wherein connections of a lot of cable wiring can be efficiently inspected in regard to the method for inspecting cable wiring. CONSTITUTION:A method for inspecting cable wiring of a system having a plurality of cable wiring is provided with a part, which is a first circuit unit connected to one end of a cable, having a transmission part 11 for transmitting specified discrimination information to signal lines in a cable and another part, which is a second circuit unit connected to the other end of the cable, having a collating part 12 for collating discrimination information received through the signal lines with self discrimination information. Inspection of cable wiring is conducted by setting unique discrimination information every cable wiring. In addition, a central inspection control part 3 and a control line 4 for connecting the inspection control part 3, each transmission part 11 and each receiving collating part 12. Constitution is performed in that the discrimination information is remotely set for each transmission part 11 and each receiving collating part 12 from the inspection part 3. Preferably the central inspection control part 3 automatically produces the discrimination information based on constitution data of the system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable wiring inspection system, and more particularly to a cable wiring inspection system for a system having a plurality of cable wirings. For example, a telecommunication switching system is composed of a large number of various functional devices (units), and a system is constructed by combining a plurality of various functional devices according to the demand and scale of the system. For this reason, it is necessary to interconnect the functional units with a large number of signal cables, and these must be reliably and reliably connected.

Nowadays, each functional unit tends to have an autonomous test function for improving maintainability, but the establishment of the test function for the portion related to the cable wiring extending between the units has been delayed, Some improvements are requested.

[0003]

2. Description of the Related Art FIG. 8 illustrates a conventional exchange system.
In the figure, 41 terminates a large number of subscriber lines.
Subscriber termination device, 41₁~ 41n is a line circuit, 42 is
Main switch device for exchanging speech paths, 43 relays speech paths
Trunk line trunk device, 43 ₁Is trunk trunk, 4
Three₂Is a leased line trunk, 44 is various call services
Service trunk equipment, 44₁Is the outgoing call
Rank, 44₂Is a call service that connects calls from subscriber lines.
Rank, 44₃Is the PB receive transformer that receives the PB signal.
Ku, 44_FourIs a PB transmission trunk for transmitting PB signals, 4
Four_FiveIs a call trunk for processing incoming calls, 45 is each of these
It is a control device for controlling the functional unit.

As described above, in the exchange system, a large number of functional units are connected by a large number of signal cables, and after installation work of such a system, the normality of all cable wiring is required to start the system normally. Need to be inspected. Conventionally, the normality of the cable wiring has been confirmed by using a specific functional unit in the system by a cable wiring test program. For example, the PB sending trunk 44 ₄ and the PB receiving trunk 44 ₃ are both the control device 4
5, which is a functional unit capable of directly exchanging digital signals with the device 5, and can be used as a test tool. Specifically, the test method using these is controlled by first controlling the main switch device 42 to set a path between the cables, and then from the control device 45 to the PB sending trunk 44.
₄ to send the information for the test, those the information cable, the path of the main switch device 42, the cable, and recovered to the controller 45 via the PB receiver trunk 44 _3, to check the health of the root is there.

However, although good if the above test results are normal, if abnormal, as its cause, cable, misconnection, PB trunk 44 _4, 44 ₃ malfunctions, even the main switch device Various causes such as a malfunction of 42 are considered, and it is extremely difficult to separate them. Moreover, although it is preferable that the test tool can be directly used as described above, such a case is generally rare. For this reason,
Conventionally, the normality of the cable wiring was confirmed at the stage of the line connection test by a separate test call by combining the available test tools in the system intricately or excluding it from the target of automatic confirmation by the test program. . However, in the former case, the test route and test procedure become more complicated, and it becomes more difficult to identify the cause of an abnormality. In the latter case, a lot of manpower and time are required.

[0006]

As described above, the prior art is as follows.
There was no cable wiring inspection method that can efficiently inspect the connection of many cable wirings. An object of the present invention is to provide a cable wiring inspection method capable of efficiently inspecting the connection of a large number of cable wirings.

[0007]

The above-mentioned problems can be solved by the structure shown in FIG. That is, the cable wiring inspection method of the present invention is the first method for connecting to one end of a cable in the cable wiring inspection method for a system having a plurality of cable wirings.
Circuit unit 1 having a transmitter 11 for transmitting predetermined identification information to a signal line in the cable,
A second circuit unit 2 connected to the other end of the cable, the second circuit unit 2 having a reception collating unit 12 for collating the identification information received through the signal line with the identification information held by the self. The cable wiring is inspected by setting unique identification information for each.

[0008]

In the figure, the first and second circuit units 1 ₁ and 2 ₁ are originally provided with a main signal processing unit for realizing the original function, and signals are exchanged between these processing units via a cable. I am going. The same applies to the circuit units 1 ₂ and 2 ₂ . Therefore, if the cables are connected incorrectly, the system can no longer operate normally. Therefore, in the present invention, the first and second circuit units 1 and 2 are respectively provided with a transmission unit 11 and a reception verification unit 12 having a simple configuration, and a cable,
By setting the identification information a and b that is unique for each wiring, the efficient inspection of the cable wiring is realized.

That is, when the cables are correctly connected as shown in the figure, the transmitter ₁ of the circuit unit 1 1
The identification information a sent to the signal line of the cable from _{No. 1} is collated with the identification information a held by itself by the reception collation unit 12 of the corresponding circuit unit 2 ₁ , and the collation coincidence is obtained. Similarly, the identification information b was sent from the transmitting unit 11 of the circuit unit 1 ₂ to the signal wire of the cable corresponding circuit unit 2
_{The second} reception collation unit 12 collates with the identification information b held by itself to obtain a collation match.

However, if the cable is erroneously connected between the circuit units 1 ₁ and 2 ₂ , the identification information a sent by the transmitting unit 11 of the circuit unit 1 ₁ is self-checked by the reception collating unit 12 of the circuit unit 2 ₂ . Since it is collated with the held identification information b, collation coincidence cannot be obtained. Similarly, if the cable is mistakenly connected between the circuit units 1 ₂ and 2 ₁ ,
Since the identification information b sent by the transmission unit 11 of the circuit unit 1 ₂ is collated with the identification information a held by itself by the reception collation unit 12 of the circuit unit 2 ₁ , collation coincidence cannot be obtained.

As described above, according to the present invention, since the unique identification information is set for each wiring of each cable, only when all the cables are correctly connected, the collation match can be obtained in all the cases.
If even one cable is erroneously connected, no match can be obtained at that portion. Therefore, according to the present invention, a large amount of time and labor spent in the conventional inspection of the cable wiring can be significantly reduced by only adding a simple configuration.

[0012] Preferably, the identification information is configured to be fixed or manually settable. Further, preferably, it comprises a central inspection control unit 3 and a control line 4 connecting the inspection control unit 3 with each transmission unit 11 and each reception collation unit 12, and the inspection control unit 3 transmits each transmission unit 11 and The identification information is configured to be remotely set for each reception collation unit 12.
This makes it possible to manufacture the transmitters 11 and the reception collating units 12 in the same configuration, so that the first and second circuit units 1 and 2 can be manufactured.
Productivity is improved. Moreover, the central inspection control unit 3 can generate and set each piece of identification information in accordance with an arbitrary rule, which makes handling of the identification information much easier.

Further preferably, the central inspection control unit 3 automatically generates the identification information based on the system configuration data. In this way, the necessary and minimum number of identification information can be efficiently generated based on the configuration data of the system delivered to the user, and the efficiency of the cable wiring inspection is significantly improved.

[0014]

Embodiments of the present invention will now be described with reference to the accompanying drawings.
Will be described in detail. The same reference numerals are used throughout the drawings.
Or, it indicates the corresponding part. FIG. 2 shows the case of the first embodiment.
Fig. 1 is a diagram showing the configuration of a cable wiring inspection method, in which 1 is
Printed board package (PKG), 11 is identification information
Transmitter (IDT), 11 ₁Is a transmission timing generator (T
TG), 11₂Is a parallel-serial converter (PS),
11₃Is an identification information setting section, 11_FourIs the driver circuit
(D), 2 is a printed circuit board package (PKG), 12
Is a reception collation unit (IDR) of identification information, 12₁Is Thailand
Ming generator (RTG), 12₂Is serial-parallel
Converter (SP), 12₃Is an identification information setting part, 12_FourIs
Comparator (CMP), 12_FiveIs a D-type flip
Flop (FF), 12₆Is a light emitting diode, 20 is each
Realize the original function in each of the packages 1 and 2.
The main signal processor (MSP) connects the packages 1 and 2 together.
The following cable, CN is a connector.

The setting units 11 ₃ and 12 _{3 in} this example may be provided with fixed identification information unique to each cable wiring in advance by a print pattern, or can be manually set by means such as a jumper terminal or a DIP switch. It may be configured to. If fixed, you can save the trouble of setting manually. On the other hand, if the configuration is such that manual setting is possible, it is possible to easily deal with a case where a request for changing the identification information occurs.

FIG. 3 is an operation timing chart of the cable wiring inspection system of the first embodiment. When the system is powered on, the transmission timing generator 11 ₁ of the transmitter 11 periodically generates a load signal LD and a series of clock signals φ _T following it. The load signal LD loads the identification information of the setting unit 11 ₃ into the parallel-serial converter 11 ₂ , and the subsequent clock signal φ _T is parallel-serial converter 11 _2.
Identification information is output serially from the data transmission signal TD
To form. Further, the data transmission signal TD is preferably transmitted on an empty signal line of the cable, and the format of the transmission signal CD on this empty signal line is, for example, as shown in FIG. It consists of data bits b _{1 to} b ₈ and the last space bit SP.

On the other hand, the reception timing of the reception collation unit 12 is issued.
Ikube 12₁Is the leading edge of the mark bit M (standing
(Falling down) is detected, and a predetermined phase delay from this
A series of clock signals φ that match the transmission bit rate_RTo
Occur. The clock signal φ _RIs the received data signal RD
Serial-parallel converter 12₂In order,
Once all the received data signals RD have been fetched,
Reception timing generator 12₁Is the check pulse signal CP
Is generated, which causes the comparator 12_FourThe comparison result of
Flip-flop 12_FiveLatch to. Comparator 1
Two_FourIf a matching match (A = B) is obtained in
Flop 12_FiveIs reset and the light emitting diode 12₆
Does not light. However, the comparator 12_FourMatch with
If (A = B) is not obtained, flip-flop
12_FiveIs set, light emitting diode 12₆Lights up
It Constant or necessary inspection function for such cable wiring
By making it function according to the
You can easily find the wrong wiring of the cable. Preferred
Ku, light emitting diode 12₆Installed near the connector CN
This allows the operator to easily check the presence and location of miswiring.
Wear.

There is also an erroneous wiring in which the cable should be connected but is not actually connected. In consideration of such a case, the reception timing generator 12 ₁ forcibly generates the collation check pulse signal CP when the trailing edge of the mark bit M (the leading edge of the received data signal RD) cannot be detected for a predetermined time. In this case, the comparator 12 ₄ cannot obtain a collation match, so the flip-flop 12 ₅ is set and the light emitting diode 12 ₆ is turned on.

In addition, a cable that has been correctly connected may be accidentally removed after that. Therefore, serial by the fall of the verification check pulse signal CP - are reset each time the contents of the parallel converter 12 _2. Thus, the inspection of the cable wiring according to the first embodiment is effectively performed not only when the system is started up but also when the system is in operation.

FIG. 4 is a diagram for explaining an application example of the cable wiring inspection system of the first embodiment. In the figure, 10 ₁ to 10 ₅ are printed board packages (PKG), and are signal cables. Generally, the flow of the main signal included in the communication system varies, and the connection form of the main signal line varies accordingly. For example, the main signal MS ₁ generated in the MSP 20 of the package 10 ₁ reaches the MSP ₂₀ of the package 10 ₂ and is terminated here. Also package 10 ₂
Of MSP20 has occurred a new main signal MS _2, together with the signal MS ₂ is connected through the package 10 ₃ to 10 ₅ in tandem (tandem), these MSP20 each package 10 ₃ to 10 ₅ It is commonly used. In any case, as a general rule, a pair of the transmission unit 11 and the reception collation unit 12 is provided for each cable wiring, and unique identification information is set in these pairs, so that the inspection of all the cable wirings of the system can be efficiently performed.

That is, the identification signal a sent from the transmission section 11 of the package 10 ₁ is the reception collation section 1 of the package 10 _2.
In step 2, the self-identification information a is collated and a collation match is obtained. Further, the identification signal b sent from the transmission section 11 of the package 10 ₂ is collated with its own identification information b by the reception collation section 12 of the package 10 ₃ to obtain a collation match. Further, the identification signal c sent from the transmission section 11 of the package 10 ₃ is collated with its own identification information c by the reception collation section 12 of the package 10 ₄ , and collation coincidence is obtained.

In the case where the signal line of the main signal MS ₂ is connected in tandem like the packages 10 ₃ to 10 ₅ , if the connection order of the cables 1 to 4 is allowed within that range, Is possible. In such a case, for example, the transmitting unit 1 like the packages 10 ₄ and 10 _5.
The configuration in which 1 is omitted may be adopted. In this case, for example, even if the cable is connected between the packages 10 ₃ and 10 ₅ and the cable is connected between the packages 10 ₅ and 10 _4, erroneous connection is not detected.

FIG. 5 shows the cable wiring inspection system of the second embodiment.
10 is a diagram showing the configuration of ₁-10_FourPudding
A board package (PKG), 13 is an identification information transmitter
(IDT), 13₁Its serial interface (S
IF), 14 is a reception collation unit (IDR) of identification information, 14
₁Is its serial interface (SIF), 14₂Is
3-state output buffer circuit (B), 15 is identification information
Transmission / reception collation unit (IDTR), 15₁Is the serial
Interface (SIF), 3 is a central inspection control unit, 31
Is a CPU that performs main control processing of the inspection control unit 3, and 32 is a CP
A memory for storing the control program of FIG. 7 executed by U31.
MEM, 33 are a keyboard and a CRT device not shown.
A console (CS) equipped with a display device, etc.,
Disk that stores configuration data of this communication system
Device (DSK), 35 is a serial interface (SI
F), 36 are common buses of the CPU 31, 4₁~ 4_mIs each
Real interface (hereinafter, also referred to as SIF) 35,
15₁, 13₁, 14₁Control connecting tandem between
The line 5 is a terminator (T) of the control line 4.

In the second embodiment, the central inspection control unit 3
By connecting the transmission unit 13, the reception collation unit 14, and the transmission / reception collation unit 15 of various types provided in each package 10 ₁ to 10 ₄ with the control line 4, any identification information from the center of each unit can be obtained. Is configured to allow remote settings. FIG. 6 is a diagram for explaining the cable wiring inspection method of the second embodiment.

FIG. 6A shows an example of the signal format on the control line 4, and the format of the control signal sent from the central inspection control unit 3 is the leading sync signal (SYN).
C), SIF13 ₁ of each package 10 ₁ to 10 _4,
Each field of an address signal (ADD) carrying unique device address information assigned to each of 14 ₁ and 15 ₁ , a command signal (COM) carrying various commands, and a data signal (DATA) carrying identification information Is made up of.

A plurality of instruction codes are prepared, a store (STOR) command is an instruction to store the identification information on the DATA field in the SIF 13 ₁ , 14 ₁ or 15 ₁ for collation, and a send (SEND) command is The identification information on the DATA field is used as a SIF for transmission.
It is an instruction to store in 13 ₁ , 14 ₁ or 15 ₁ . The sense (SENS) command is an instruction to read the collation result in the SIF 13 ₁ , 14 ₁ or 15 ₁ into the CPU 31, and the SIF 13 ₁ , selected by the address signal,
14 ₁ or 15 ₁ sends a response signal (RSP) of the verification result to the control line 4 at an appropriate timing after receiving the sense command. Then, reset (REST) command is a command to reset the SIF13 _1, 14 ₁ or 15 ₁ of operation, and the like.

FIG. 6B shows an inspection table for the cable wiring of the embodiment, which is the CPU 31 of the inspection control unit 3.
Can efficiently inspect the cable wiring according to the contents of the inspection table. This inspection table is
Sequentially attached item numbers (ITEM), model numbers of signal cables arranged in order of item numbers, unique identification information assigned to each signal cable, device addresses of various SIFs to be connected to both ends of the signal cable (SIFADD) , Various SIF types (TYPE),
Further, it is provided with storage fields such as a forward link (link F) of each signal cable when the main signal line is connected in tandem, a backward link (link R), and the like.

For example, the identification information a is assigned for the wiring inspection of the signal cable, and the transmission section 13 (TYPE = T) and SIFADD = 02 accessible at SIFADD = 01 at both ends of the signal cable. An accessible reception matching unit 14 (TYPE = R) is connected. Further, the identification information b is assigned for the wiring inspection of the signal cable, and SI is provided at both ends of the signal cable.
The transmission / reception collation unit 15 (T
(YPE = TR) and a transmission / reception collating unit 15 (TYPE = TR) accessible by SIFADD = 04 are connected. And ITEM = 3,4 for this signal cable
Signal cable, which is connected in tandem.

FIG. 7 is a control flowchart of the cable wiring inspection method of the second embodiment. In step S1, the configuration file of this exchange system is read from the disk device 34. The system configuration file is a file that defines the model, quantity, detailed specifications, etc. of each component device (unit) actually delivered according to the requirements and scale of the system. It includes information and detailed data such as the model numbers of the packages 10 ₁ to 10 ₅ connected to both ends of the cable. In step S2, a cable wiring inspection table as shown in FIG. 6B is automatically generated based on the system configuration file. In step S3, inspection of the cable wiring is executed according to the generated inspection table.

For example, first, SIF1 of the package 10 ₂ .
4 ₁ to send the "STOR" command including the identification information a,
Then, the "SEND" command including the identification information a is sent to the SIF 13 _{1 of the} package 10 ₁ . By the way, the SIF 13 ₁ of this example synchronizes the transmission timing with the main signal processing unit 20, and when the frame synchronization pulse FP is received from the main signal processing unit 20, the SIF 13 ₁ is identified as an empty slot of the main signal in the transmission frame. The signal a is time-division multiplexed and transmitted. That is, this type of transmission unit 13 is effective when there is no empty signal line in the cable. Meanwhile, package 1
The SIF 14 _{1 of} 0 ₂ similarly performs frame synchronization pulse F
When the frame synchronization pulse FP is received from the main signal processing unit 20 in synchronization with P, the identification signal a is extracted from the empty slot of the main signal in the received frame and collated with the identification information a held by itself. After that, the CPU 31 sends a "SENS" command to the SIF 14 _{1 of the} package 10 ₂ to read the collation result.

On the other hand, the transmission / reception collation unit 15 of the packages 10 ₃ and 10 ₄ has both the transmission function and the reception collation function of the identification information, and any of them can be the transmission unit or the reception collation unit. Since such a transmission / reception collating unit 15 can be commonly used for all packages, productivity and maintainability are improved. Further, usually, when connecting a cable between a transmitting / receiving package, there is usually an error that a cable is erroneously connected to an adjacent connector, but in rare cases, the transmitting package or the receiving package is erroneously connected. Can also occur. Even in such a case, if each package includes the transmission / reception collating unit 15, such an erroneous connection can be easily inspected and found. In addition,
Since the cable of this example has an empty signal line, each transmission / reception collation unit 15 transmits / receives an identification signal regardless of the main signal processing unit 20.

The CPU 31 first determines the S of the package 10 ₃ .
IF 15 ₁ to send a "STOR" command with the identification information b, then the SIF15 ₁ package 10 ₄ sends a "SEND" command with the identification information b. This allows
The transmission / reception matching unit 15 of the package 10 ₄ sends the identification signal b to the empty signal line of the cable, and the transmission / reception matching unit 15 of the package 10 ₃ receives the identification signal b from the empty signal line and holds the identification information b held by itself. To match. After that,
The CPU 31 puts “SE in the SIF 15 ₁ of the package 10 _3.
Send the "NS" command to read the verification result.

In step S4, it is determined whether or not the inspection of all the cable wirings is completed. Note that such an inspection may be performed not only when the system is started up but also when the system is in operation. Thus, according to the second embodiment, for example, when a cable is erroneously connected, a collation mismatch occurs in the collation unit of the erroneously connected partner, and the erroneous connection can be easily found. Moreover, since the information of the inspection result of each part is collected in the inspection control part 3, all the cable wirings can be easily grasped at one place. In the case where the cable to be connected is not connected, it is possible to determine that the connection is erroneous, because no matching has been obtained at the time of sending the "SENS" command.
Further, since the CPU 31 can reset the contents of the serial-parallel conversion record SP by sending the "REST" command, it is possible to immediately detect if the signal cable once normally connected is disconnected during the operation of the system.

Although the above embodiment has described the communication switching system, the present invention can be applied to any system having a plurality of cable wirings. Further, in the second embodiment, the identification information is automatically generated based on the system configuration data, but instead, the operator of the inspection control unit 3 independently creates the inspection plan of the cable wiring on the console 33,
Alternatively, the desired identification information may be manually input.

The various structural features shown in the above embodiments can be combined in various ways.
Various modifications can be configured without departing from the concept of the present invention.

[0036]

As described above, since the cable wiring inspection system of the present invention has the above-mentioned structure, the connection of a large number of cable wirings can be efficiently inspected by adding simple functional elements.
In addition, this can greatly reduce a great amount of time and labor conventionally required for inspecting the cable wiring.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a diagram showing a configuration of a cable wiring inspection system of the first embodiment.

FIG. 3 is an operation timing chart of the cable wiring inspection method of the first embodiment.

FIG. 4 is a diagram for explaining an application example of the cable wiring inspection method of the first embodiment.

FIG. 5 is a diagram showing a configuration of a cable wiring inspection system of a second embodiment.

FIG. 6 is a diagram illustrating a cable wiring inspection method according to a second embodiment.

FIG. 7 is a control flowchart of the cable wiring inspection method of the second embodiment.

FIG. 8 is a diagram illustrating an example of a conventional exchange system.

[Explanation of Codes], cable 1 ₁ , 1 ₂ first circuit unit 2 ₁ , 2 ₂ second circuit unit 3 inspection control unit 4 control line 11 transmission unit 12 reception collation unit

Claims (4)

[Claims] 1. A cable wiring inspection method for a system having a plurality of cable wirings, wherein the first circuit unit (1) is connected to one end of a cable and sends predetermined identification information to a signal line in the cable. And a second circuit unit (2) that is connected to the other end of the cable and that has a transmitting section (11) for checking the identification information received via the signal line with the identification information held by itself. A cable wiring inspection method, comprising: a reception collation unit (12), wherein the cable wiring is inspected by setting unique identification information for each cable wiring. 2. The cable wiring inspection method according to claim 1, wherein the identification information is configured to be fixed or manually settable. 3. A central inspection control unit (3), and a control line (4) connecting the inspection control unit (3) with each transmission unit (11) and each reception verification unit (12), The cable wiring inspection method according to claim 1, wherein the inspection control unit (3) is configured to remotely set the identification information to each transmission unit (11) and each reception collation unit (12). 4. The cable wiring inspection method according to claim 3, wherein the central inspection control unit (3) automatically generates identification information based on system configuration data.