CO-DS1 (DS1 CO Trunk)
Issue 1 May 2002
8-445555-233-143
Any FAIL The NPE of the tested port did not conference the tones correctly. This will
cause noisy and unreliable connections.
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 every administered trunk 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 every port fails, check the CARR-POW.
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 CSI’s) have the correct administration.
6. Replace the circuit pack.
NOTE:
If the conference circuit test fails for every port on a circuit pack, a -5 Volt
power problem is indicated. To investigate problems with a power unit,
see ‘‘CARR-POW (Carrier Power Supply)’’. If a red LED is lit on a
TN736 or TN752 power unit circuit pack, replace the pack.
PASS The port can correctly conference multiple connections. User-reported troubles
on this port should be investigated by using other port tests and by examining
station, trunk, or external wiring.
Table 8-180. Test #7 Conference Circuit Test — Continued
Error
Code
Tes t
Result Description / Recommendation
Continued on next page
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