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 10-318CO-DS1 (DS1 CO Trunk)
10
FAIL 1. Enter the ’list configuration board UUCSS’
command. If the circuit pack is a TN767B vintage 8
or 9, replace the circuit pack with a TN767C V3 or
later.The error log may have error type 1281 entries.
2. Test all administered trunks on the board. If one
fails, this could be an off-board problem (such as an
incoming seizure or an off-hook port seizure during
the test). Retest the board.
3. If all of the ports fail, check the CARR-POW (see
Note below).
4. If several ports fail, check the error log for TONE-BD
or TONE-PT errors. If there are such errors, take the
appropriate action. When the TONE errors have
cleared, rerun the test.
5. If the retry passes and troubles have been reported,
coordinate isolation with the CO. Make sure that the
switch, the CO, and any NTCE equipment (the
CSU’s) have the correct administration.
6. Replace the circuit pack.
NOTE:
If the 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 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.
Table 10-89. TEST #7 Conference Circuit Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page