Maintenance-Object Repair Procedures
555-233-143
8-1590 Issue 1 May 2002
Procedure 1: Isolating TDM-Bus Faults
This procedure is an attempt to isolate the TDM-bus fault to circuit packs that are
essential to the system’s operation. For each of the following circuit packs in the
port network where the TDM-bus fault appears, perform Procedure 1.
1. Display the Alarm Log for the circuit pack via the display alarms
command.
2. If there are alarms for the circuit pack, refer to that section and try to
resolve the alarms.
3. Whether or not every alarm can be cleared, test the TDM bus again via the
test tdm P command.
4. If some TDM-bus tests fail, implement Procedure 1 for the next circuit pack.
5. If every TDM-bus test passes, the problem has been fixed.
6. If every circuit pack in the list has been investigated, go to Procedure 2.
Procedure 2: Removing and Reinserting Port
Circuit Packs
Procedure 2 removes and reinserts port circuit packs (those in the carrier’s purple
slots) one or more at a time. Use this procedure for each port circuit pack in the
port network until the problem is resolved or until every circuit pack in the port
network have been tried. To execute diagnostic procedures on the Expansion
Interface and Tone-Clock circuit packs, see ‘‘Procedure 3: Removing and
Reinserting EPN Control Circuit Packs’’. Although these circuit packs reside in
purple slots, procedure 2 does not apply. This procedure does apply to the Tone
Detector circuit pack.
Circuit Pack Error Log Names
Tone-Clock TONE-BD, TONE-PT, and TDM-CLK
MSS/Network Control* SW-CTL and H-ADAPTER
Tone Detector DETR-BD, GPTD-PT, and DTMR-PT
Expansion Interface EXP-INTF
Packet Interface* PKT-INT
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