User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-458DID-TRK (DID Trunk)
10
3
7
129
131
133
(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.
Table 10-125. TEST #33 Loop Around and Conference
Circuit Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page