Avaya Definity SI, Руководство по обслуживанию, Страница: 1330 / 2968

Maintenance Object Repair Procedures
555-233-123 10-544 Issue 4 May 2002
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(cont’d.)
FAIL
(cont’d.) FAULT ISOLATION: Proceed as follows unless power or tone
problems are suspected (see note below).
1. To make sure the problem is on-board, disconnect the
port from the far-end and retry the test. Coordinate this
with the CO, or do it after busy hours.
2. If the retry fails, replace the circuit pack.
3. If the retry passes and no troubles have been reported,
disable the test in the trunk group administration. If the
retry passes and troubles have been reported, coordinate
isolation with the CO.
NOTE:
If the loop around and conference circuit test fails for all
ports 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 a 631DB AC power
unit, refer to the CARR-POW (carrier port power unit for
AC-powered systems) Maintenance documentation. To
investigate problems with a 645B DC power unit, refer
to the CARR-POW (carrier port power unit for
DC-powered systems) Maintenance documentation. If a
red LED on TN736 or TN752 power unit circuit pack is
on, 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. If the test fails again, see
’FAULT ISOLATION’ above.
PASS DID Trunk Loop Around and Conference Test is successful.
This port is functioning properly.
1. If users are reporting troubles, examine loop connections
to the port and refer problem to the CO.
Table 10-198. TEST #33 Loop Around and Conference Circuit Test — Continued
Error
Code Test
Result Description/Recommendation
Continued on next page