DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1710TDM-BUS (TDM Bus)
9
f. If the TDM Bus failure has disappeared, reinsert the circuit pack
and run the
test tdm P
command to see if the TDM Bus failure is
still present.
If any of the TDM Bus tests fail, replace the suspect circuit pack.
The procedure is complete.
If none of the TDM Bus test fail, the procedure is complete.
4. If the backplane pins are not bent, run the
test tdm P
command to
determine if the TDM Bus fault is still present.
command to determine if the TDM Bus fault is still present.
a. If any of the TDM Bus tests fail, the problem is with another circuit
pack. Reinsert the original suspect circuit pack and continue with
Part 4 for the next circuit pack.
b. If none of the TDM Bus tests fail, replace the suspect circuit pack.
The procedure is complete.
5. If all standby circuit packs have been tested, and the TDM Bus failure still
exists, execute the
reset system interchange
(PPN) or the
reset pnc
interchange
commands (EPN), and the
set tone-clock
command to get
the currently active circuit packs into standby mode. Continue with Part 4
of this procedure for each of the newly active circuit packs.
Procedure 4
Procedure 4 attempts to isolate the TDM Bus failure to a particular set of carriers.
Only the circuit packs in selected carriers are checked. Procedure 4 is used if the
preceding procedures fail, because it can help locate multiple circuit pack
failures and failures of the carrier hardware itself.
In this procedure, the TDM/LAN Cable Assemblies and TDM/LAN Bus
terminators are replaced. If this action does not resolve the TDM Bus fault, the
carriers are reconfigured so that certain carriers are disconnected from the TDM
Bus. This is done by moving the TDM/LAN Bus terminators (ZAHF4) on the
carrier backplane. To terminate a TDM Bus at the end of a particular carrier, the
TDM Bus cable that connects the carrier to the next carrier should be unplugged
and replaced with the TDM/LAN Bus terminator (see tFigure 9-107
). When the
length of the TDM Bus is modified the circuit packs that are essential to the
system operation and TDM Bus maintenance (for example, MSSNET and
Tone/Clock), must still be connected to the new
shortened
TDM Bus.
