Avaya Definity SI, Maintenance Manual, Page: 1392 / 2968

Maintenance Object Repair Procedures
555-233-123 10-606 Issue 4 May 2002
7 FAIL 1. Check for errors on TONE-BD or TONE-PT. If there are
errors, take the appropriate actions.
2. If the Reflective Loop Around 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, check
the circuit pack for a red LED. If the red LED is on, then
replace the appropriate power unit circuit pack. If neither
the TN736 nor the TN752 power unit circuit pack is
present, then the OLS631DB AC power unit may be
defective. The system may contain a TN736 or TN752
power unit circuit pack OR an OLS631DB AC power unit,
BUT NOT BOTH TYPES OF POWER UNITS.
NOTE:
To investigate problems with an OLD631DB AC power
source, refer to CARR-POW Maintenance
documentation.
3. Rerun the test.
4. If the test fails again, replace the circuit pack.
PASS CO Trunk Loop Around and Conference Test is successful.
User-reported troubles on this port should be investigated by
using other port tests and by examining trunk or external
wiring.
Table 10-226. TEST #33 Loop Around and Conference Circuit Test — Continued
Error
Code Test
Result Description/Recommendation
Continued on next page