Avaya S8700 Maintenance Manual page 818

Maintenance-Object Repair Procedures
Table 8-37. Test #47 Loop Around and Conference Test — Continued
Error Test
Code Result Description / Recommendation
7 FAIL The conference test or the noise test failed. This could cause noisy or
unreliable connections, or users calling this port may hear an echo. The
problem can also be off-board, as described below.
13 The reflective loop around with gain set to low and the 600-ohm balance failed.
This will cause noisy or unreliable connections.
14 The reflective loop around test (with the gain set to high, using RC balance)
failed. This could cause noisy or unreliable connections. The problem can also
be off-board, as described below.
15 The nonreflective loop-around test failed. This could cause noisy or unreliable
connections, or users calling this port may hear an echo. The problem can also
be off-board as described below.
1. Disconnect the terminal equipment from the circuit pack at the
2. If the test fails again, replace the circuit pack and reconnect the terminal
8-96 Issue 1 May 2002
cross-connect and run the test again.
equipment. If the test passes the second time, then the test results were
affected by the terminal equipment connected to the port. In this case,
ignore the results of this test if every other test passes or aborts and the
station is operating properly. Failure of test 47 does not cause an alarm. If
there are failures of other tests, then investigate those errors. User
reported troubles with this port should be investigated by using other port
tests, by examining station wiring, and by examining the station to ensure
that it is correctly translated as off-premises or on-premises.
NOTE:
If the Looparound and Conference circuit test fails for every port on a
circuit pack, a -5 Volt power problem is indicated. If a TN736 or TN752
power unit circuit pack is present, either the 631DB AC power unit or the
676B DC power unit may be defective. (The 631DB power unit is used
in a medium cabinet powered by an AC source. The 645B power unit is
used in a medium cabinet powered by a DC power source.) The system
may contain a TN736 or TN752 power unit circuit pack or a 631DB AC
power unit, but not both types of power units. To investigate problems
with either the 631DB AC or 645B DC power unit, see
(Carrier Power Supply)'' on page
TN752 power unit circuit pack, replace the pack. If the test fails on more
than 1 port, check for errors on the TONE-BD or the TONE-PT. If errors,
take appropriate actions. When the tone errors are cleared, rerun the
test.
''CARR-POW
8-393. If a red LED is lit on TN736 or
Continued on next page
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