JPS588785B2 - Trunk line connection test method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for testing the connection function of a trunk line connecting two exchanges in a data exchange or the like.

FIG. 1 shows a block diagram of an outgoing connection test of an exchange using a conventional test equipment of this type.

1 is a test call generation device, 2 is an exchange, 31 to 3n are outgoing relay lines that connect the exchange 2 to other exchanges, 4 is a subscriber line used as an origination line for the test call generation device 1, and 5 is a first destination. This is a group of outgoing trunk lines that connect to the switching center.

Generally speaking, an outgoing connection is a process in which when a local exchange subscriber communicates with another exchange subscriber, the local exchange selects and connects an outgoing relay line, which is a communication line to the other exchange. be.

Here, the selection operation of the outgoing trunk line is performed by selecting an arbitrary line from among the idle lines of the outgoing trunk line group to the destination exchange.

The operation of a conventional output connection test will be explained using FIG.

The test call generation device 1 sends the destination number and destination subscriber number to the exchange 2 as selection signals through the origination line 4 accommodated in the test call generation device 1.

The exchange 2 identifies the opposite exchange by the destination exchange number, and selects an outgoing relay line 3n that is not in communication from an outgoing relay line group 5, which is a group of outgoing relay lines 31 to 3n to the opposite exchange.

The exchange 2 sends the destination number and destination subscriber number as selection numbers to the other exchange through the selected outgoing relay line 3n, but in order to avoid affecting the other exchange that is generally in service, testing is generally carried out. Since the communication is not connected to the other party's device, the operation sequence after the response does not proceed.

On the other hand, since the test call generating device 1 disconnects the calling line 4 at a certain timing after sending the selection signal, the exchange 2
After detecting the disconnected state, the outgoing relay line 3n is disconnected and the series of outgoing connection operations is completed.

In order to test the operation of the exchange 2 after the response, a method may be considered in which it is connected to a test device that simulates the other party's device.

However, in this method, the exchange randomly selects the outgoing relay line, so a test device that simulates the other party's equipment cannot predict the outgoing relay line that the exchange will select and cannot identify the opposing outgoing line, so the connection operation of the exchange is not normal. There is a drawback that the gender cannot be confirmed.

Possible measures to prevent the exchange from randomly selecting an outgoing trunk line include specifying the outgoing trunk line to be selected or blocking other lines, but both have the disadvantage that the trunk line selection operation of the exchange is not completely tested. be.

This invention has been made to solve these drawbacks, and therefore, the purpose of the invention is to provide a relay system that allows testing of the outgoing relay connection operation of an exchange by its own exchange without having to take any action on the exchange. The purpose is to provide a line connection test method.

The drawings will be explained in detail below.

FIG. 2 is a conceptual diagram of an outgoing trunk line connection test configuration for explaining the present invention, in which 6 is selection signal information sent through the outgoing line 4, and 7 is the line number # in the outgoing trunk line group 5 from the exchange 2. 1 is a memory location for storing selection signal information sent to the outgoing relay line 31, 8 is a memory location for storing selection signal information 6 sent out from the outgoing line 4 of line number #Z, and 9 is an outgoing relay line of line number #n from the exchange 2. A memory location 10 stores the selection signal information 7 sent to the line 3n, a memory location 11 stores verification information for verifying the selection signal information 7.
is the outgoing trunk line 3 with line number #n in the outgoing trunk line group 5
12 is a memory location where the response signal 11 is stored; 13 is the response signal sent to the originating line 4 with line number #Z; 14 is a memory location where the response signal 13 is stored; 15 is a memory location in which verification information for verifying the response signal 13 is stored.

The operation of the outgoing trunk line connection test according to the present invention will be explained using FIG.

The test call generator 1 makes a call through the originating line 4 with line number #Z.

The exchange 2 detects a call originating from the originating line 4 and sends a dialable signal to the originating line 4.

When the test call generating device 1 receives the dialable signal, it inserts the line number #Z of the calling line 4 in the test call generating device 1 in place of the called subscriber number, which is the selection signal, through the calling line 4, and displays the called station number and the calling station number. A selection signal composed of a line number is stored in advance in an information storage location 8 and sent to the exchange 2 as selection signal information 6.

The exchange 2 determines the connection type based on the receiving station number in the received selection signal information 6, and if the result shows that it is a connection to the outgoing relay line, then in order to connect to the other exchange,
One line that is not in communication is selected from the outgoing relay line group 5 that is configured as a group opposite to the station route.

FIG. 2 shows a state in which the output relay circuit 13n of circuit number #n is selected.

The exchange 2 sends out an activation signal through the outgoing relay line 3n with line number #n, and upon receiving the activation signal, the test call generating device 1 prepares to receive the selection signal.

Subsequently, selection signal information 7 consisting of a receiving station number and an originating line number is sent from the exchange 2 through the outgoing relay line 3n of line number #n.

After storing the received selection signal information 7 in the storage location 9, the test call generating device 1 decodes the calling line number and learns the connected calling line.

In FIG. 2, it is known that the outgoing relay line 3n with line number #n is connected to the originating line 4 with line number #Z.

In order to check whether the selection signal information 7 sent from the exchange 2 to the outgoing trunk line 3n is normal, the test call generating device 1 uses the selection signal information 7 received from the outgoing trunk line 13n of line number #n. The contents of the location 9 where .

If the verification result is normal, the test call generating device 1 transmits the call to the exchange 2.
A response signal is sent through the outgoing trunk line selected in .

Note that the response signal has the same content for each outgoing trunk line group.

In FIG. 2, the response signal 11 is sent out from the storage location 12 through the output relay line 3n with line number #n.

The sent response signal 11 is sent as a response signal 13 to the originating line 4 of line number #Z via the communication path of the exchange 2.

Test call generating device 1 receives response signal 13 from originating line 4 with line number #Z, and stores it in storage location 14 .

Next, the test call generating device 1 uses the line number # to check whether the exchange 2 has correctly selected the outgoing relay lines 31 to 3n of the station corresponding to the destination station number of the selection signal information 6.
The content of the location 14 where the response signal 13 received through the transmission line 4 of Z is stored is compared with the verification information 15.

If the verification result is normal, communication is then performed between the originating line 4 with line number #Z and the outgoing trunk line 3n with line number #n, and the disconnection signal from the outgoing line 4 or the outgoing trunk line 3n is transmitted to the exchange 2. When detected, the communication path is opened and a series of outgoing relay line connection tests are completed.

In addition, if the results of the comparison with the selection signal information 7 and response signal information 13 are not normal, an error display is displayed on the test call generation device 1 and the test call generation device 1
disconnects the originating line 4 with line number #Z and the outgoing relay line 3n with line number #n.

The exchange 2 detects this disconnection signal and opens the communication path.

In addition, in this test, connection can be confirmed using the above method even if there are multiple outgoing relay line groups.

FIG. 3 is a block diagram of a test call generation device showing an embodiment of the present invention, in which sequence control circuits 17Z to 17n 16 control all connection sequences of each line, and signal from the exchange 2. Receive signal receiving circuit group, 18Z~1
8n is a signal transmitting circuit group for transmitting signals to exchange 2, 19
2 is a memory that stores various signal information necessary for connection tests;
0 and 21 are registers that store information read from the memory 19, and 22 is a collation circuit that collates the contents of the register 20 and the register 21.

The signal transmission/reception operation within the test call generation device in the explanation of FIG. 2 will be explained using FIG. 3.

The selection signal is transmitted from the sequence control circuit 16 to the memory 19 by giving the address of the selection signal information storage location 8 for the line number Z of the outgoing line 4 to the signal transmission circuit 18.
Sequentially read out the selection signal digit by digit to Z, signal transmitting circuit 1
8Z to exchange 2.

The selection signal from the exchange 2 is received by the signal receiving circuit 17n and sequentially stored digit by digit in the selection signal information storage location 9 of the memory 19 instructed by the sequence control circuit 16.

When all digits are received, the sequence control circuit 16 reads the contents of the selection signal information storage location 9 to the register 20, accesses the memory 19 using the incoming subscriber number as an address, and stores the selection signal verification information of the outgoing line at the storage location 10. The contents of are read to the register 21.

Next, the contents of the register 20 and the contents of the register 21 are checked by the checking circuit 22, and the result is sent to the sequence control circuit 16.
Report to.

If the verification result is normal, the contents of the response signal storage location 12 are sent to the exchange 2 via the signal transmission circuit 18n under the control of the sequence control circuit 16.

The response signal received through the exchange 2 is stored in the response signal storage position 14 via the signal receiving circuit 17Z under the control of the sequence control circuit 16.

After receiving the response signal, the contents of the response signal storage location 14 are read out to the register 20 and the contents of the response signal verification information storage location 15 are read out to the register 21 under the control of the sequence control circuit 16.

Next, the contents of the register 20 and the contents of the register 21 are checked by the checking circuit 22, and the result is sent to the sequence control circuit 1.
Report to 6.

Note that the outgoing, incoming, and disconnecting operations are performed by the sequence control circuit 16 controlling the signal transmitting circuits 18Z to 18n and the signal receiving circuits 17Z to 17n.

As explained above, the present invention identifies the outgoing line connected to each outgoing relay line accommodated in the test call generating device, and
Since the normality of the switching equipment's outgoing trunk line selection and the normality of the selection signal sent from the switching equipment through the selected outgoing trunk line can be automatically confirmed, the switching equipment can continue normal connection operation without taking any special measures. , and has the advantage that the outgoing relay line connection operation can be tested only at the local exchange.

Another advantage is that the connection sequence from call origination to disconnection in the outgoing trunk line connection can be automatically tested.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of a conventional outgoing trunk line connection test system, FIG. 2 is a diagram showing the configuration of the outgoing trunk line connection testing system of the present invention and the internal configuration of the test call generation device, and FIG. 3 is a diagram showing the configuration of the outgoing trunk line connection testing system of the present invention. FIG. 2 is a detailed block diagram of a call origination device. 1... Test call generator, 2... Exchange, 31-3n... Outgoing relay line, 4... Outgoing line, 5... Outgoing relay line group, 6... Selection signal information sent from the outgoing line, 7... From the exchange through the outgoing relay line Selection signal information to be sent out, 8...Storage position of selection signal sent out from the outgoing line, 9...Storage position of selection signal received from the outgoing relay line, 10...Storage position of selection signal verification information, 11...Sent out from the outgoing relay line. response signal information, 12
...The storage location of the response signal sent from the outgoing relay line, 13...
Response signal information sent to the originating line, 14... Storage location of response signal received from the originating line, 15... Storage location of response signal verification information, 16... Sequence control circuit for controlling connection sequence of each line, 17Z~ 17n...Signal receiving circuit group that receives communication signals from the exchange, 18Z to 18n
...Signal transmitting circuit group for transmitting communication signals to the exchange, 19...
A memory for storing communication signal information, 20... a register for accumulating read information from the memory, 21... a register for accumulating read information from the memory, 22... a collation circuit for collating the contents of the registers.

Claims (1)

[Claims] 1. An exchange that receives the terminating station number and terminating subscriber number as a selection signal from the originating line, selects a trunk line based only on the terminating station number, and transmits the terminating subscriber number as is to the terminating station. a test call generating device for testing, an incoming call is connected from an originating line of the test call generating device to a relay line of the test call generating device through the exchange;
A calling line number indicating the position of the calling line in the test call generating apparatus is inserted in place of the called subscriber number in the selection signal sent from the calling line of the test call generating apparatus, and the selection signal is received from the selected trunk line in the exchange. The relay is characterized in that the connection operation of the exchange is tested by identifying the position of the originating line in the test call generation device by decoding the incoming subscriber number, that is, the origination line number, in the test call generation device. Line connection test method.