Avaya S8700 Maintenance Manual page 80

Maintenance Object Repair Procedure
Table 8-332. Test #57 Hybrid Circuit and Conference Circuit Test — Continued
Error Test
Code Result Description / Recommendation
7 FAIL The conference circuit test failed. The conference circuit test is performed only
if the hybrid test passes. The conference circuit test verifies that the network
processing element (NPE) can correctly conference several test tones
together. The test is executed in two parts. The first half of the test verifies the
operation of the NPE's first three conference channels, while the second half
verifies the NPE's remaining four conference channels. The test puts the NPE
in loop around mode and instructs it to talk on a specified time slot while
listening to a 1004-Hz tone, using the conference channels. A GPTD then
measures the signal and noise levels of the conferenced output and reports
whether or not these are within an acceptable range. The failure may be due to
off-board circumstances, the most common of which is an off-hook occurring
during the test. It is possible that the port may still be functional from a user's
point of view. Also, check the error logs against the GPTD-BD, the TONE-BD,
and the TONE-PT.
1. This error can be caused by a disconnected terminal. First, ensure that the
2. Then, issue the display port and station status commands to determine
3. If test continues to fail, issue the busyout port and release port
57 FAIL Hybrid Circuit test failed. This can result in noisy or bad connections.
1. Run circuit pack tests to check the Tone Generator circuit pack and the
2. Resolve any problems that are detected on the Tone Generator circuit pack
3. If the Tone Generator and Tone Detector circuit packs are functioning
8-776 Issue 1 May 2002
terminal is connected and the wiring is OK.
whether the station is idle. If so, issue the test port command for this port.
commands, and then retest the port.
Tone Detector circuit pack, using test board UUCSS short command.
or Tone Detector circuit pack.
properly, and the test still fails, replace the MET Line circuit pack.
NOTE:
If the Hybrid Circuit and Conference Circuit test fails for every port on a
circuit pack, a -5 Volt power problem is indicated. To investigate
problems with a power unit, see
page 8-1013.
''RMC-ENV (Power/Fan Sensors)'' on
Continued on next page
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