Avaya S8700 Maintenance Manual page 414

Maintenance Object Repair Procedure
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.
Circuit Pack
Tone-Clock
MSS/Network Control*
Tone Detector
Packet Interface*
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 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
Control Circuit
procedure 2 does not apply. This procedure does apply to the Tone Detector
circuit pack.
If the TDM bus problem is present when the circuit pack is inserted, but is
resolved when the circuit pack is removed, either the circuit pack or the backplane
pins in that slot are causing the problem. If the backplane pins are intact, replace
the circuit pack. If some of the tests fail regardless of whether the circuit pack is
inserted or removed, and the backplane pins are intact, the circuit pack is not the
cause of the problem. In a multiple failure situation, the circuit pack could be one
cause of the TDM bus problem. However, other simultaneous failures might also
be responsible for TDM-bus faults.
8-1110 Issue 1 May 2002
Error Log Names
TONE-BD, TONE-PT, and TDM-CLK
SW-CTL and H-ADAPTER
DETR-BD, GPTD-PT, and DTMR-PT
PKT-INT
''Procedure 3: Removing and Reinserting EPN
Packs''. Although these circuit packs reside in purple slots,
555-233-142