Avaya Definity SI Maintenance Manual page 1243

CO-TRK (CO Trunk)
Table 10-168. TEST #33 Loop Around and Conference Circuit Test — Continued
Error
Code
7,
129,
131, or
133
555-233-123
Test
Result
FAIL The conference capabilities of the port failed (Error Code 7).
The reflective 404-Hz Tone Test failed. No transmission was
detected to or from the port (Error Code 129).
The reflective 1004-Hz Tone Test failed. No transmission was
detected to or from the port (Error Code 131).
The reflective 2804-Hz Tone Test failed. No transmission was
detected to or from the port (Error Code 133).
FAULT ISOLATION: Proceed as follows unless power or tone
problems are suspected (see notes on the next page).
1. To make sure the problem is on-board, disconnect the
port from the CO and retry the test. Coordinate this with
the CO, or do it after busy hours; otherwise, the CO may
put the connection out of service.
2. If the retry fails, replace the circuit pack.
3. If the retry passes and no troubles have been reported,
disable the test. If the retry passes and troubles have
been reported, refer the problem to 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.
Description/Recommendation
Continued on next page
Issue 4 May 2002 10-457