DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1708TDM-BUS (TDM Bus)
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6. Run test tdm P to determine if the TDM Bus fault is still present. If none of
the TDM Bus tests fail, the procedure is c ompleted.
7. If the TDM Bus fault is still present, the suspec t circuit pack was not the
cause of the TDM Bus failure. Do the following:
a. Remove the replacement circui t pack that was just inserted an d
replace it with the previously susp ected circui t pack.
b. Repeat Procedure 3 for the next ci rcuit pack on the list for this
procedure.
If Procedure 3 fails to identify the caus e of the problem, go to Procedu re 4.
Procedure for PPN with Duplicated SPE orEPN with Duplicated PNC
In this type of configuratio n, the test procedure is made up of several
independent p arts. In a duplicated system it is desirable to investig ate whether
or not circuit pac ks are causing problems on the TDM Bus when they are in
active mode or when they are in stand by mode or both. The proc edure utilizes
SPE interchange in the PPN, or a PNC interchange in the EPN. If the TDM Bus
fault disappears after the i nterchange takes place, the n ewly standby MSSNET
(PPN), or Expansion Interface (EPN), is suspect and should b e replaced. If the
problem still exists, the Tone/Clocks are then interchanged . If the TDM Bus failure
then disappears, the newly standby Tone/Clock is suspect and should be
replaced. If the TDM Bus prob lem still exists, then the procedure b egins
diagnostics on individual circuit packs and backplane pins.
Part 1 (PPN Procedure)
1. If performing this p rocedure for a PPN carrier, execute status
port-network to determine which SPE is currently active. Run reset
system interchange to make the currently active SPE standby.
2. Run test tdm P to determine if the TDM Bus fault is still present.
3. If the TDM Bus fault is gone, replace the for merly active MSSNET circuit
pack.
4. Run reset system interchange again to get the new MSSNET circuit pack
on the active SPE.
5. Run test tdm P to determine if the TDM Bus fault is still present.
6. If the TDM Bus fault is still present, replace the new MSSNET circuit pack
with the original suspect circuit pack, and continue on to Part 3.
7. If the TDM Bus fault has disappeared , the procedure is comp lete.
Part 2 (EPN Procedure)
1. If doing this proc edure for an EPN carrier, execute the status pnc
command to determine whi ch PNC is currently active. Run reset pnc
interchange to make the currently active PNC standb y.