DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1561SW-CTL (Switch Control)
9
0 FAIL The Switch Control cannot communicate on the TDM bus control channel. If the
system is equipped with the Standard Reliability configuration, you will probably
not be able to make or receive calls involving telephones connected to the
Processor Port Network.
1. Run the short test sequence several times to make sure that this failure is
occurring consistently. Then run the long test sequence to reset the Switch
Control. Sometimes, running the long test sequence may clear the problem.
Remember that the long test sequence is
destructive
. Placing and receiving
of calls will be affected for several seconds.
2. If there are no TDM Bus alarms against the standby TDM bus, switch the
control channel from its current bus to the standby bus using the set tdm
command. Refer to the TDM-BUS maintenance documentation for
information on how to use this command. If this test passes on the new bus,
then investigate the possibility of TDM Bus failures. If the test fails even after
the control channel is switched to the standby TDM bus, then proceed to
Step 3 or 4.
3. If the system is still able to process calls, replace the MSSNET circuit pack
during a time that would cause the least service disruption. If the system is
equipped with the High Reliability or Critical Reliability Configuration this
can be done immediately since a MSSNET circuit pack on the standby SPE
can be replaced without affecting service. The procedure for replacing the
MSSNET circuit pack is described in ‘‘Replacing SPE Circuit Packs’’ in
Chapter 5.
4. If calls cannot be made, then replace the MSSNET circuit pack immediately.
The procedure for replacing the MSSNET circuit pack is described in
‘‘Replacing SPE Circuit Packs’’ in Chapter 5.
PASS The Switch Control can communicate with selected port circuit packs over the
TDM bus.
Table 9-593. TEST #94 Control Channel Transmission Test — Continued
Error
Code
Tes t
Result Description/ Recommendation
Continued on next page
