JPH0459821B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pseudo call test device that tests whether each connection path in a telephone exchange operates normally, and particularly relates to a pseudo call test device that uses a representative number system. The present invention relates to a pseudo call testing device for checking connection failures and incorrect connection of connected speech paths after connection in an exchange.

[Conventional technology] When a new exchange is installed at a telephone office, or when a private branch exchange (PBX) is installed in a large office or factory, etc.
When a switch is installed, it is necessary to test that each connection channel of the switch operates properly before actual operation. Normally, pseudo call test equipment is used to test such exchanges.

In such a pseudo call test device, each terminal of the pseudo call test device is connected to the terminal of each line circuit of the exchange, a pseudo call signal containing the line number of the destination is sent from the calling terminal to the exchange, and the call signal is sent from the exchange. A call signal is sent to the terminal of the designated rotation number, and checked via the incoming terminal connected to this terminal. After the incoming terminal and outgoing terminal are connected, a response confirmation signal is sent back from the incoming terminal to the outgoing terminal via the exchange.

However, with such a test method,
The same signal is sent to all incoming terminals and the same signal is received at all outgoing terminals, so even if there is crosstalk or incorrect connection, the same signal will be sent, so accurate test results can be expected. Can not.

In order to solve such problems, the pseudo call shown in FIGS. 4 and 5 is configured so that after connection, the called side returns a response confirmation signal consisting of a tracer sound and a specific signal tone to the calling side. A test method has been proposed (Japanese Unexamined Patent Publication No. 119256/1983).

That is, the originating terminal 2 and the terminating terminal 3 of the pseudo call testing device 1 are connected to the terminals of the exchange 4 to be tested. The pseudo call test device 1 includes a transmitting circuit 5,
Incoming call circuit 6, selected number sending circuit 7, signal receiving circuit 8, control circuit 9, operation panel 10, channel circuit 1
1st class is placed. Furthermore, in the storage section of the control circuit 9, each transmitting circuit 5 is stored as shown in FIG.
For each receiving circuit 6, an area for storing n-digit sending number information and two-digit confirmation information is formed, and as shown in FIG.
An area for storing AT (tracer sound) information is formed.

Then, a pseudo call of the DP/PB dial signal is sent from the selected digit sending circuit 7 to the sending circuit 5 to the exchange 4.
When the connection channel is formed in the exchange 4 and the outgoing terminal 2 and the incoming terminal 3 are connected,
A response confirmation sound containing the two-digit AT information shown in FIG. 5b is transmitted from the incoming terminal 3 side to the outgoing terminal 2 side. The transmitting side stores the received two-digit AT (tracer sound) information in the confirmation information area of the corresponding transmitting circuit 5 shown in FIG. 5a. In addition, the corresponding incoming call circuit 6 shown in FIG. 5b
The last two digits of the corresponding calling circuit number are stored in the area of the calling circuit number corresponding to the calling circuit number.

In this way, the AT information and the information specifying the transmitting circuit are stored in the confirmation information area and the calling number area shown in FIGS.

[Problems to be Solved by the Invention] However, even with the pseudo call test device configured as described above, the following problems still occur.
In other words, in private branch exchanges, etc., a representative number system is often adopted;
If the line with the representative number input from the outside is blocked, you will be connected to an empty line one by one. Therefore, when testing such a systematic switch using a pseudo call test equipment, the same line designation number sent from one outgoing terminal can be used to test the number of lines that may be connected to this outgoing terminal. There will be multiple incoming terminals. Therefore, in such a case, if multiple types of transmitting terminals are connected using the same line designation number, it is difficult to determine which incoming terminal is the legitimate incoming terminal according to the representative number system, and which incoming terminal is due to incorrect connection. A problem arises in that it is not possible to determine whether the terminal is an incoming terminal or not.

Furthermore, if only a test for erroneous connections is performed, there is a problem in that poor connections may also be determined to be erroneous connections.

Furthermore, when using a conventional pseudo call test device to pass check the connecting path of an exchange, it only passes checks from the called side to the calling side, and does not perform a pass check in both directions. If a connection failure or the like occurs, there is a concern that this connection failure may not be discovered.

The present invention has been made in view of the above circumstances, and its purpose is to set an incoming terminal identification number that identifies each incoming terminal for each outgoing circuit, thereby identifying when an abnormality has occurred. It is an object of the present invention to provide a pseudo call test device that can sometimes distinguish between incorrect connections and poor connections, and can perform more precise tests on connection channels of exchanges.

[Means for Solving the Problems] The present invention connects each line circuit of an exchange through an outgoing terminal and an incoming terminal, and connects the exchange by generating a pseudo call to each line circuit of the exchange. A pseudo call test device for testing a communication path, comprising: a signal output circuit having a plurality of single signal generation circuits and outputting one single signal or a composite signal obtained by combining a plurality of single signals based on an external control signal; Each incoming terminal identification number that identifies each incoming terminal is assigned to one representative number for each outgoing circuit connected to each outgoing terminal, and each single signal that constitutes the composite signal corresponding to each incoming terminal identification number. a storage unit that stores each combination of signals; a signal receiving circuit that receives and identifies signals inputted through the transmitting terminal and the receiving terminal; and a signal receiving circuit that receives and identifies signals inputted through the transmitting terminal and the receiving terminal; While the incoming terminal is connected to the incoming terminal via the connection channel of the exchange, a specific composite signal output from the signal output circuit is transmitted as a pass check signal from the incoming terminal, and the outgoing terminal which received this pass check signal A bidirectional path defect check means that returns the same path check signal to confirm that the same path check signal is returned to the incoming terminal, and after the bidirectional path defect check is completed, the incoming call assigned from the incoming terminal to this incoming terminal is checked. identification number transmitting means for outputting a composite signal corresponding to the terminal identification number from the signal output circuit via the incoming terminal and transmitting it to the outgoing terminal; and an incoming terminal identification number of the composite signal input to the outgoing terminal is stored in a storage section. and an incorrect connection check means for confirming that the outgoing terminal and the incoming terminal are normally connected by the connecting communication path of the exchange when the identification number of the incoming terminal corresponds to one incoming terminal identification number assigned to the corresponding outgoing circuit. It has the following characteristics.

[Function] With the pseudo call test device configured in this way, each incoming terminal identification that identifies each incoming terminal assigned to one representative number for each outgoing circuit connected to each outgoing terminal is stored in the storage unit. A number and each combination of each single signal constituting a composite signal corresponding to each incoming terminal identification number are stored. Then, in response to a pseudo call sent out from the originating circuit, when the originating terminal and the specified terminating terminal are connected via the connection communication path of the exchange, the terminating terminal identification uniquely determined for the terminating terminal is performed. A composite signal indicating the number is outputted from the signal output circuit via the incoming terminal and transmitted to the outgoing terminal via the connecting channel. When the incoming terminal identification number of the composite signal input from the outgoing terminal is assigned to the corresponding outgoing circuit stored in the storage unit and matches one incoming terminal identification number, the outgoing terminal and the incoming terminal are assigned to each connecting channel of the exchange. It is determined that the connection is normal.

[Example] An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a pseudo call test device according to an embodiment. This pseudo call test device 12
The outgoing terminal 13 and the incoming terminal 14 of are connected to both terminals of a connecting channel 16 shown in dotted lines of the exchange 15 to be tested. In the pseudo call test device 12,
The transmission terminal is connected to the transmission circuit 17 and the switch circuit 18.
It is connected to a single signal receiving circuit 19 via a switch circuit 20, and to a code string signal receiving circuit 21 via another switch circuit 20. Furthermore, the signal output circuit 23
It is connected to the. This signal output circuit 23 is composed of eight single signal generation circuits that output single signals with different oscillation frequencies, and each single signal generation circuit outputs low frequency signals L1, L2, L3, and L4.
A group of circuits that output high wave signals H1, H2, H3,
It is separated into a group of circuits that output H4.

On the other hand, the incoming terminal 14 is connected to the code string signal receiving circuit 21 via the incoming circuit 24 and the switch circuit 20.
It is also connected to a single signal receiving circuit 19 via a switch circuit 18. In addition, the incoming terminal 14 is connected to an incoming circuit 24 and a switch circuit 25.
is connected to a signal output circuit 26 having the same configuration as the signal output circuit 23.

Here, the single signal receiving circuit 19 and the code train signal receiving circuit 21 constitute a signal receiving circuit.

And each switch circuit 18, 20, 22, 2
The opening and closing of each contact point 5 is controlled by a control signal sent from a control circuit 27 consisting of, for example, a microcomputer. Further, information (data) on the signals received and identified by the single signal receiving circuit 19 and the code string signal receiving circuit 21 and inputted from the transmitting terminal 13 and the receiving terminal 14 is inputted to the control circuit 27. Furthermore, a storage section 28 composed of a RAM or the like is connected to this control circuit 27.

Note that FIG. 1 shows the transmitting terminal 13 and the transmitting circuit 17.
And the incoming terminal 14 and the incoming circuit 24 are each 1
In reality, a plurality of each are provided, and in the example, (n+1)
They are placed one by one. Circuit numbers and terminal numbers from 0 to nth are assigned to each of them.

In the storage unit 28, a two-digit incoming terminal identification number AxxBxx that similarly identifies each incoming terminal 14 from No. 0 to n is stored for each of the above-mentioned outgoing circuits 17 from No. 0 to No. n. It's happening. The incoming terminal identification number AxxBxx of these terminals is connection channel 16.
It is used when testing for incorrect connections. In addition, each incoming terminal identification number is stored in this storage unit 28.
Each combination of each single signal making up the composite signal corresponding to AxxBxx is also stored.

In the pseudo call test device configured in this way, when a single signal is sent from the transmitter to the connection channel 16 of the exchange 15 via the transmission terminal 13,
The contact of the switch circuit 22 connected to the single signal generation circuit corresponding to the frequency signal of the single signal to be sent out in the signal output circuit 23 is closed by the control signal of the control circuit 27. Furthermore, when sending out a composite signal, it is sufficient to close two contacts corresponding to the single signal generation circuits that output the respective single signals to be composited by the switch circuit 22.

When transmitting a single signal and a composite signal from the incoming signal to the connecting channel 16 of the exchange 15 via the incoming signal terminal 14, the control circuit 27 is transmitted by the same means.
The switch circuit 25 is controlled by the signal output circuit 2.
It is sent from 6.

Further, the single signal inputted to the transmitting terminal 13 is inputted to the single signal receiving circuit 19 by closing the a contact of the switch circuit 18 in the control circuit 27. Further, the composite signal inputted to the transmission terminal 13 is inputted to the code string signal transmission circuit 21 by closing the contact a of the switch circuit 20.

Further, the single signal and composite signal input to the incoming terminal 14 are input to the single signal receiving circuit 19 and the code string signal receiving circuit 21 by closing the b contacts of the switch circuit 18 and the switch circuit 20, respectively. be done.

In the actual circuit, each of the switch circuits 18, 20, 22, 25 is not a relay having mechanical contacts as shown, but a semiconductor switch is used.

Next, using the pseudo call testing device 12 in which each component circuit operates as described above, the sending terminal 1 is
3 and the incoming call terminal 14 specified in the pseudo call are connected through the connecting channel 16 in the exchange 15,
Sequence control between the originating side and the receiving side of the pseudo call testing device 12 during the two-item test of path failure check and error check, and the check termination process will be explained with reference to FIG.

First, when the connection channel 16 is formed, a path failure check is performed. That is, first, from the receiving side, for example, a single signal H is output from the signal output circuit 26.
4 is outputted via the switch circuit 25, and sent to the connection line 16 of the exchange 15 via the incoming terminal 14 as the incoming side pulse check signal a. Then, this incoming side pass check signal a is sent to the outgoing terminal 1.
3 and is inputted to the single signal receiving circuit 19 via the switch circuit 18. When the control circuit 27 confirms that the single signal H4 has been input, the switch circuit 22 is controlled to connect L1 from the signal output circuit 23 to the transmitter terminal 13 using the single signal as a transmitter pass check signal. It is sent to the communication path 16. Then, this calling side pass check signal becomes an outgoing pass check signal b of a composite signal (L1+H4) in the connecting communication path 16 between H4 on the receiving side and L1 on the calling side, and is inputted to the receiving terminal 14 and sent via the switch circuit 20. code string signal receiving circuit 21
is input to. When the control circuit 27 confirms that the composite signal (L1+H4) has been input, the switch circuit 25 is controlled and the signal output circuit 2
A single signal from 6 to L1 is sent from the incoming terminal 14 to the connection number divider 16 as a bidirectional pass check completion signal. Then, this bidirectional pulse check completion signal becomes a bidirectional pulse check completion signal c of a composite signal (L1+H3) in the connecting communication path 16 with the single signal (H3) from the transmitting side, and is inputted to the transmitting terminal 13. The signal is inputted to the code string signal receiving circuit 21 via the switch circuit 20. And control circuit 2
At step 7, it is confirmed that the composite signal (L1+H3) has been input, and it is determined that there are no connection failures in both directions in this connection channel 16, and the path failure check process is ended.

When the path defect check process is completed, a misconnection check is executed. For example, when the receiving side receives the incorrect connection check request signal d consisting of a composite signal (L1+H3) sent from the calling side, and the code string signal receiving circuit 21 receives and identifies the disconnection of the L1 signal,
The two-digit incoming terminal identification number AxxBxx assigned to the own incoming terminal 14 corresponding to the originating circuit number of the connected originating circuit 17 stored in the storage unit 28 is read. Then, the switch circuit 25 is controlled and the signal output circuit 26 sends out the composite signal (LX+HX) assigned to the number corresponding to the first digit Axx from the incoming terminal 14 as the incoming terminal number signal e. Next, use the same method to obtain the incoming terminal identification number.
A composite signal (LY+HX) corresponding to the second digit number Bxx of AxxBxx is sent from the incoming terminal 14 as the incoming terminal signal f. The calling side receives a composite signal (LX+HX) of the two input terminal number signals e and f,
(LY+HY) is received by the code string signal receiving circuit 21 and sent to the control circuit 27. The control circuit 27 converts the information of (LX+HX) and (LY+HY) into the original incoming terminal identification number AxxBxx. This incoming terminal number signal e stored in the storage unit 28,
It is checked whether f matches the receiving terminal identification number AxxBxx of the receiving terminal 14 of the called party assigned to the input calling circuit 17. If they match, it is determined that no misconnection has occurred.

When the above erroneous connection check process is completed, the next check completion process is started. First, the called side sends out a called side check completion signal g consisting of a single signal (H3). This called side check end signal g
When the transmitting side confirms the signal input with the single signal receiving circuit 19, it sends out a single signal (L2) as the transmitting side check completion signal. Then, the single signal (H3) on the called side and the single signal (L
2), the combined signal (L2+H
3) becomes the transmitting side check end signal h. When the receiving side confirms the composite signal (L2+L3) of the inputted calling side check completion signal h in the code string signal receiving circuit 21, this check completion process is completed.

If a connection failure is detected in the corresponding connection channel 16 as a result of the path failure check process, the check completion process is immediately executed.

A pseudo-call test device that tests each connection path 16 of the exchange 15 using such sequence control will detect a called path check signal a sent from the called side to the calling side in the path failure check.
Since a pass check is executed in both directions using the calling side pass check signal b sent from the calling side to the called side, for example, even if the connecting communication path 16 of the exchange 15 is configured in a 4-wire system, the connection communication path 16 is Connection failures can be detected reliably. Therefore, the test accuracy can be further improved.

Furthermore, the transmitting side pastic signal b is generated by the code string signal circuit 21 using a composite signal (L1+H4).
Since the call is received and identified using a single signal (H4) for both round trips, the stability of operation as a pseudo call test device can be further improved, and the reliability of the entire device can be improved. .

Further, when a connection failure is detected as a result of the path failure check, it becomes possible to determine whether or not to execute the next erroneous connection check process. In this embodiment, if a connection failure is detected, the erroneous connection check process is not executed.

In addition, in the error connection check process, the incoming terminal 1 of the incoming terminal 1 corresponds to the outgoing circuit 17 connected from the incoming side to the incoming terminal 14 via the connection channel 16.
2-digit incoming terminal identification number assigned to 7
Since AxxBxx is sent to the calling party, the calling party receives the input terminal identification number.
From AxxBxx, it can be confirmed that the corresponding calling circuit 17 is the receiving terminal 14 that actually called. Therefore, even if this exchange 15 employs a representative number system, it can be confirmed whether or not the incoming terminal identification number is valid.

Therefore, the input terminal identification number
If AxxBxx is different from the incoming terminal identification number AxxBxx in the corresponding area of the storage unit 28, it can be determined that there is an incorrect connection. As a result, it is possible to distinguish between a connection failure in the bus failure check process and an erroneous connection in the erroneous connection check process. As a result, the exchange 15 was tested in more detail as a pseudo call test device.
The test for each connection channel 16 can be performed.

[Effects of the Invention] As explained above, according to the pseudo call testing device of the present invention, the bidirectional pass check is performed after the originating terminal and the terminating terminal are connected via the connecting channel of the exchange. For example, a connection failure can be detected correctly even in a four-wire exchange. Furthermore, each receiving terminal identification number for specifying each receiving terminal assigned to one representative number for each transmitting circuit is stored in the storage section. Then, when checking for incorrect connection when transmitting and receiving the incoming terminal identification number,
When the incoming terminal identification number returned to the outgoing terminal matches one incoming terminal identification number assigned to the corresponding outgoing circuit, it is determined that the outgoing terminal and incoming terminal are correctly connected by the connection channel of the exchange. are doing. Therefore, even if the switch adopts the representative number system, the incorrect connection check can be carried out correctly. Therefore, when an abnormality occurs, it is possible to distinguish between incorrect connection and poor connection, and it is possible to perform a more detailed and reliable test on each connection path of the exchange.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the schematic configuration of the pseudo call test device of the embodiment, FIG. 2 is a diagram showing the contents of the storage unit of the embodiment, and FIG. 3 is a sequence control diagram showing the operation of the embodiment. 4 is a block diagram showing a conventional pseudo call testing device, and FIG. 5 is a diagram showing the contents of the storage section of the conventional device. 12...Pseudo call test device, 13...Outgoing terminal,
14...Incoming terminal, 15...Exchange, 16...Connection channel, 17...Outgoing circuit, 18, 20, 2
2, 25... Switch circuit, 19... Single signal receiving circuit, 21... Code string signal receiving circuit, 23, 2
6...Signal output circuit, 24...Incoming circuit, 27...
...Control circuit, 28...Storage section, A00B00~
AnnBnn...Incoming terminal identification number.

Claims (1)

[Scope of Claims] 1. Connected to each line circuit of the exchange 15 through the outgoing terminal 13 and the incoming terminal 14, and generates a pseudo call to each line circuit of the exchange to connect the connecting communication path of the exchange. In a pseudo call test device for testing, signal output circuits 23 and 2 have a plurality of single signal generation circuits and output one single signal or a composite signal obtained by combining a plurality of single signals based on an external control signal.
6, and each transmitting circuit 1 connected to each of the transmitting terminals.
a memory for storing each incoming terminal identification number that specifies each incoming terminal assigned to one representative number every 7, and each combination of each of the single signals forming the composite signal corresponding to each incoming terminal identification number; Part 28
and a signal receiving circuit 19 for receiving and identifying signals inputted through the transmitting terminal and the receiving terminal.
21, and a specified signal outputted from the signal output circuit in response to a pseudo call sent from the originating circuit, with the originating terminal and the designated incoming terminal being connected via the connection channel 16 of the exchange. The combined signal is sent as a pass check signal from the incoming terminal side,
bidirectional path defect checking means for confirming that the same path check signal is received by the incoming terminal by returning the same path check signal from the transmitting terminal that received the path check signal; , identification number transmitting means for outputting a composite signal corresponding to an incoming terminal identification number assigned to the incoming terminal from the incoming terminal from the signal output circuit via the incoming terminal and transmitting it to the outgoing terminal; and the outgoing terminal. When the incoming terminal identification number of the composite signal input to the input terminal matches one incoming terminal identification number assigned to the corresponding outgoing circuit stored in the storage unit, the outgoing terminal and the incoming terminal are connected to the connecting communication path of the exchange. 1. A pseudo-call test device comprising: an erroneous connection check means for confirming that the connection is normal.