DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1557SW-CTL (Switch Control)
9
Switch Control Reset Test (#93)
This test is destructive if the Switch Control is on the active SPE.
This test resets the Switch Control and determines if it can successfully go
through its initialization sequence. The test is destructive if the Switch Control
circuit is on an active SPE since there is the possibility of losing some control
Any FAIL Messages could not be looped back through the control channel interface. 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. This failure could be due to either a MSSNET circuit pack hardware failure
or the loss of system timing signals. If the Switch Control is alarmed, then a
MSSNET circuit pack failure should be suspected. If the Switch Control is
not alarmed, then investigate the possibility of the loss of system timing
signals before attempting to replace the MSSNET circuit pack. See
“TDM-CLK”. A TDM Bus Clock problem may cause many port circuit pack
red LEDs to light. If only the MSSNET circuit pack LED is lit, suspect the
MSSNET circuit pack. If many port circuit pack red LEDs are lit, suspect a
TDM Bus Clock problem. Test #92 and Test #94 run as part of the test
sequence for the test switch-control C command (where C represents the
carrier location of the circuit under test). Both tests will fail if the system
timing signals are lost. If test #94 passes, then do not suspect the loss of
timing signals.
Any
(cont’
d.)
FAIL 2. 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.
If the test is still failing, 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 control channel interface between the SPE and the Switch Control is
working correctly
Table 9-591. TEST #92 Control Channel Interface Test — Continued
Error
Code
Tes t
Result Description/ Recommendation
Continued on next page
