JPH05244273A - Test equipment for x-75 trunk circuit - Google Patents

Abstract

PURPOSE:To obtain the test equipment for the X.75 trunk circuit in an ISDN exchange capable of testing the X.75 trunk circuit during communication. CONSTITUTION:An ISDN exchange 100 comprising a channel switch 1, a central processing unit 2, a packet handier 3, and an X.75 trunk circuit 4 connecting to the packet handler 3 is provided with a caller pseudo packet terminal equipment 5, a test controller 7 controlling the caller pseudo packet terminal equipment 5 or the like and a maintenance terminal equipment 8. A called ISDN exchange 101 has an automatic incoming call function and is provided with the called party use pseudo packet terminal equipment looping back a test use data packet to the caller equipment. Then the test controller 7 compares the data for the test looped back from the called party use pseudo packet terminal equipment 6 with the data for the test sent to the called party use pseudo packet terminal equipment 6 by the caller pseudo packet terminal equipment 5 to execute the operation propriety test for the X.75 trunk circuit.

Description

Detailed Description of the Invention

[0001]

The present invention relates to maintenance of ISDN exchanges,
Regarding the test equipment, in particular, CCITT Recommendation X.30 which interfaces a packet call between ISDN exchanges. X.75 compliant X.75. The present invention relates to a test device for a 75 trunk circuit.

[0002]

2. Description of the Related Art FIG. 75 is a network configuration diagram of ISDN exchanges 200 and 201 using a 75 trunk circuit. It is for explaining the test of the 75 trunk circuit. In this FIG.
A speech path switch 11, a central processing unit 12 for controlling the speech path switch 11, and a packet handler 13 for processing a packet call connected to the speech path switch 11.
And CCITT connected to this packet handler 13
Recommendation X. X.75, which is an interface circuit for connecting to another exchange according to the method defined in H.75. The ISDN switch 200 including the trunk circuit 14 and the trunk circuit 14 of 75 trunk circuit 14b, packet handler 13
b, an ISDN switch 201 including a communication path switch 11b and a central processing unit 12b, and an ISDN 50.

The conventional X.20 in each of the ISDN exchanges 200 and 201 described above. 75 trunk circuit 14, 14b is tested according to each X. Each of the 75 trunk circuits 14 and 14b is provided with a dedicated interface circuit with the test apparatus 19. Then, for example, X. 75 trunk circuit 14 is tested, the X. 75 The test equipment 19 is connected to the dedicated interface circuit of the trunk circuit 14. X.
75 The output line of the trunk circuit 14 to the ISDN exchange 201 for game is directly connected to the input line from the ISDN exchange 201 of the game so that connection is set again, and the test device 19 transmits the test data to the output line by pseudo transmission. Test device 1 confirms that the collected data is returned from the input line.
X.9 by confirming with. 75 The normal operation of the trunk circuit 14 is confirmed.

[0004]

In the above test method, each X. Since each 75 trunk circuit is provided with a dedicated interface circuit for the test equipment to carry out the test, the X.75. 75 The device cost of the trunk circuit itself is increased, and the desired X.75.
75 When performing the interface test of the trunk circuit, the corresponding dedicated interface circuit and test equipment 19
Since the test had to be performed after connecting and through the human hands, the test method was very complicated.

Moreover, in the above test method, the connection with the ISDN is cut off and the X. The output line to the ISDN of the trunk circuit of the 75 trunk circuit is reconnected to the input line from the ISDN so that the test is performed by re-setting the connection. There is also a problem that the test cannot be performed when the 75 trunk circuit is in operation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a simple X.75 trunk circuit test apparatus capable of testing an X.75 trunk circuit in an ISDN exchange even during communication.

[0007]

The solution means of the present invention for solving the above problems is a speech path switch, a central processing unit for controlling the speech path switch, and a packet call connected to the speech path switch. Packet handler for performing the processing of CCITT Recommendation X. X.75, which is an interface circuit for connecting to another exchange according to the method defined in H.75. An ISDN switch composed of a trunk circuit and an ISDN switch is provided for the caller side and the callee side. 75 In the test equipment of the trunk circuit, the called ISDN exchange is provided with an incoming pseudo packet terminal having an automatic incoming call function, which is connected to the communication path switch and returns the received test data packet to the calling terminal, In the ISDN exchange on the calling side, a pseudo packet terminal for outgoing call connected to the speech path switch, call control of the pseudo packet terminal for outgoing call, and the test data returned from the pseudo packet terminal for incoming call And the test data sent to the incoming pseudo packet terminal by the outgoing pseudo packet terminal by comparing the X.
A test control device for performing an operation quality test of the 75 trunk circuit and a maintenance terminal for inputting a test command connected to the test control device are provided.

[0008]

EXAMPLE An example of the present invention will be described below with reference to FIG. FIG. 1 is a network configuration diagram of an ISDN exchange using the present invention.

In FIG. 1, an ISDN exchange 100 is provided.
Are connected to the packet switch 3, a central processing unit 2 for controlling the packet switch 1, a packet handler 3 for processing packet calls connected to the packet switch 1, and a packet handler 3. CCITT Recommendation X.
Other 75 ISDN exchange 101 and ISDN50
X. which is an interface circuit for connecting via X. 75 trunk circuit 4. Also,
Similarly, the ISDN exchange 101 of the opposite station also has a speech path switch 1b, a central processing unit 2b for controlling this speech path switch 1b, a packet handler 3b, and an X.X connected to this packet handler 3b. 75 trunk circuit 4b. On the other hand, a pseudo packet terminal 5 for transmission is connected to the speech path switch 1 of the ISDN exchange 100, and a test controller 7 having a maintenance terminal 8 is connected to the pseudo packet terminal 5 for transmission. The test controller 7 is also connected to the central processing unit 2 of the ISDN exchange 100. The maintenance terminal 8 is a device for a man-machine interface for inputting a test command into the test control device 7 by a maintenance person and displaying a test result. Is a control device that analyzes the input information of (1) and outputs a transmission instruction to the transmission pseudo packet terminal 5, and displays the test result notified from the transmission pseudo packet terminal 5 on the maintenance terminal 8. On the other hand I
The incoming pseudo packet terminal 6 is connected to the speech path switch 1b of the SDN switch 101.

In the above configuration, the following X. The test operation of the 75 trunk circuit 4 will be described. The maintenance person operates the maintenance terminal 8 to perform the test request and the X. 7
5 Enter the trunk circuit number. The test information input from the maintenance terminal 8 is analyzed and processed by the test control unit 7, and the central processing unit 2 stores the X. The test controller 7 outputs the number of the 75 trunk circuit 4. In response to this, the central processing unit 2 receives the X. 75 The subscriber number of the incoming pseudo packet terminal 6 of the ISDN exchange 101 to which the trunk circuit 4 is connected is sent to the test controller 7. Based on this subscriber number, the test controller 7 instructs the pseudo packet terminal 5 for transmission to make a call. The outgoing call request packet transmitted by the outgoing pseudo packet terminal 5 makes a call, and the call path switch 1, the packet handler 3, and the X. 75 is sent to the ISDN 50 via the trunk circuit 4, and is sent to the incoming pseudo packet terminal 6 via the opposite ISDN exchange 101. The incoming pseudo packet terminal 6 has an automatic incoming function, and a call is set up with the outgoing pseudo packet terminal 5 in response to the received call request packet. When this call is set, the outgoing pseudo packet terminal 5 sends a test data packet to the incoming pseudo packet terminal 6. The incoming pseudo packet terminal 6 sends the received test data packet again to the outgoing pseudo packet. It is sent back to the terminal 5. The pseudo packet terminal 5 for transmission compares the test data packet transmitted first with the data packet received after being returned, and makes a comparison and confirmation whether the data packet is correctly transmitted and received. The pseudo packet terminal 5 for transmission notifies the test controller 7 of this comparison result, and the test controller 7 causes the maintenance terminal 8 to display the result.

As described above, when a call is set in the actual network connection state, X. 75 The trunk circuit 4 is being tested.

[0012]

As described above, the IS according to the present invention
X. in a DN switch. The test equipment for the 75 trunk circuit connects a pseudo packet terminal for outgoing call to the speech path switch of the ISDN exchange on the calling side, and a pseudo packet terminal for incoming call with an automatic incoming call function to the ISDN exchange on the called side. The test control device for controlling the pseudo packet terminal for transmission and the maintenance terminal are connected.

When the maintenance person gives a test instruction using the maintenance terminal, the test control device controls the caller to make a call from the outgoing pseudo packet terminal to the incoming pseudo packet terminal, and to send the test data packet X. The operation of the 75 trunk circuit was confirmed.
As a result, X. It is not necessary to provide a dedicated interface circuit with the test equipment for each of the 75 trunk circuits. When testing the interface circuit of the 75 trunk circuit, there is no need to change the connection between the interface circuit and the test device, and the test can be performed efficiently and economically. In addition, X. Since the call is set in the actual network connection state and the test is performed instead of folding the output line of the trunk circuit to the input line, the test under test X.75 is performed. Even if the 75 trunk circuit is in operation, the test can be performed.

[Brief description of drawings]

FIG. 1 relates to an embodiment of the present invention and is a diagram showing a network configuration thereof.

FIG. 2 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1, 1b, 11, 11b Speech path switch 2, 2b, 12, 12b Central processing unit 3, 3b, 14, 14b Packet handler 4, 4b, 14, 14b X. 75 Trunk circuit 5 Pseudo packet terminal for sending 6 Pseudo packet terminal for receiving 7 Test control device 8 Maintenance terminal 19 Test device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication H04Q 3/42 105 C 9076-5K 11/04 9076-5K H04Q 11/04 L

Claims (1)

[Claims] 1. A speech path switch, a central processing unit for controlling the speech path switch, a packet handler for processing a packet call connected to the speech path switch, and a CCITT recommendation X connected to the packet handler. ． 75
The interface circuit for connecting to other exchanges in the system specified in X. An ISDN exchange consisting of 75 trunk circuits is provided for both the calling side and the called side.
X. of network systems connected by SDN.
75 trunk circuit test equipment, comprising an incoming pseudo packet terminal having an automatic incoming call function for returning the received test data packet to the calling terminal, which is connected to the called side ISDN switch to the speech path switch, In the ISDN exchange on the calling side, a pseudo packet terminal for outgoing call connected to the speech path switch, call control of the pseudo packet terminal for outgoing call, and the test data returned from the pseudo packet terminal for incoming call And the test data sent to the incoming pseudo packet terminal by the outgoing pseudo packet terminal by comparing the X. A test device for an X.75 trunk circuit, comprising: a test control device for performing an operation pass / fail test of the 75 trunk circuit; and a maintenance terminal for inputting a test command connected to the test control device.