JPH0226449A - Tester for isdn network terminating device - Google Patents

Abstract

PURPOSE:To improve the operability of a test, to shorten test time and to improve test quality by testing automatically an ISDN network terminating set in a single body. CONSTITUTION:An ISDN network terminating set which is a tested device is connected to a tester 1 through a U interface connector 3 and an S interface connector 4 and is displayed on a test console 5. The test in the tester 1 is held by executing a stored test program by a processor 6, and by changing the test program, test contents can be freely changed and added. Thus, a test procedure is simplified, the test time is shortened and further, the test quality is improved.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an ISDNm termination equipment tester.

[Conventional technology]

Previously, l5DNI! There is no suitable testing equipment for testing g-terminal equipment, so testing is done by incorporating it into the system and actually passing calls.

[Problem to be solved by the invention]

In the test by incorporating into the conventional system mentioned above,
The test procedure is complicated and the test time is long because the test is conducted manually using real calls.Furthermore, it is difficult to trace faults because there is no fault information.Furthermore, the test quality is poor because detailed tests are not possible. There are problems such as poor performance.

[Means to solve the problem]

The l5DN II11 termination device tester of the present invention is a l5DN
% A U interface circuit which is an upper interface of the terminating device, an S interface circuit which is a lower interface of the ISDN network terminating device, B, , B2.
A pattern generator that generates a D channel signal and a control signal, a multiplexer circuit that multiplexes each signal generated by the pattern generator, and a multiplexer circuit that multiplexes the received signals B, , B2 . A demultiplexer circuit that separates the D channel signal and a control signal, a pattern check circuit that checks the signal from the demultiplexer circuit, and an LAPD that controls the D channel protocol.
A processor that controls the test execution of the I5DN network terminal device, and an input/output control circuit that controls the input/output of test result reports.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Referring to FIG. 1 showing an embodiment of the present invention, an ISDN network termination device 2, which is a device under test, is connected to a test device 1 through a U interface connector 3 and an S interface connector 4, and is displayed on a test console 5. be done. Next, the operation inside the testing machine 1 will be explained. The test is carried out by executing a test program stored in the memory 7 on the processor 6, and the test contents can be freely changed or added by changing the test program.

Considering the B1 channel continuity test as an example of the test,
The data generated by the pattern generator 15a is multiplexed into the U interface format by the multiplexer 11 and sent to the U interface circuit 9. U
The data sent to the interface circuit 9 is ISDN
It is sent to the S interface circuit 10 through the network termination device 2.

Furthermore, it is separated into each signal by the demultiplexer 14, and the B
, channel data is sent to the pattern check circuit 18a and checked, and the check results are sent back to the processor 6. This tests the continuity of the B1 channel in the downstream direction. Similarly, the pattern generator 17
a. Multiplexer 13. S interface circuit 10
．． l5DN network termination device 2. U interface circuit9.
Demultiplexer 12. The upstream continuity of the B1 channel is tested at the route of the pattern check circuit 16a, and the B1 channel is tested for continuity in the upstream direction.
Complete the continuity test for 1 channel. In addition, 82 channel continuity test, control signal C transmission/reception test, and D
Similarly, the tester 1 performs a channel continuity test and the like.

〔Effect of the invention〕

As explained above, according to the present invention, by automatically testing a single ISDN network termination device, it is possible to improve test operability, shorten test time, and improve test quality.

Multiplexer, 13...Multiplexer, ]4... Demultiplexer, 15a, 15b, 15c, 17a.

17b, 17cm...Pattern generator, 16a.

16b, 16c, 18a, 18b, 18c...-pattern check circuit, 19.20...LAPD circuit.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention.

Claims (1)

[Claims] A U interface circuit which is an upper interface of the ISDN network termination device, an S interface circuit which is a lower interface of the ISDN network termination device, and B_1.
, B_2, a pattern generator that generates a D channel signal and a control signal, a multiplexer circuit that multiplexes each signal generated by the pattern generator, and a demultiplexer circuit that separates the received signal into B_1, B_2, a D channel signal, and a control signal. multiplexer circuit;
A pattern check circuit that checks the signal from the demultiplexer circuit, an LAPD circuit that controls the protocol of the D channel, a processor that controls the execution of the test of the ISDN network termination device, and an input/output circuit that controls the input and output of the test result report. 1. An ISDN network termination device tester comprising a control circuit.