DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1553SW-CTL (Switch Control)
9
signals and not by a Switch Control failure. If the system is not equipped
with the High Reliability or Critical Reliability option, or if the Switch control
circuit is on the active processor, use the
test switch-control
command
to test the Switch Control.
In a system is equipped with duplicated SPEs and the hardware error is
reported against the Switch Control on the standby processor, use the
following procedures. The Control Channel Transmission test which
detected this error cannot run on the Switch Control circuit on the standby
SPE since the Switch Control circuit on the standby SPE is not allowed
access to the TDM bus. Therefore if the system is equipped with
duplicated SPEs and if this error is associated with the Switch Control
circuit on the standby SPE, the error was detected while the Switch Control
circuit was running on an active SPE.
To allow the Control Channel test to run on this circuit, it will be necessary
to initiate an SPE interchange, using the procedures described below. This
action should only be taken during a time that would cause the least
service disruption since exiting calls may disconnect if a failure detected
on the newly active Switch Control circuit causes a spontaneous switch
back to the other SPE. If this possible action is
not
acceptable, first verify
that no TDM bus problems are detected when the
test TDM 1
command is
entered and then replace the MSSNET circuit pack on the standby SPE. If
TDM problems are detected, refer to the TDM-BUS maintenance
documentation to clear those problems.
1. Initiate a test of the Switch Control circuit on the standby SPE using
the
test switch-control C long
command (where C represents the
carrier location of the standby SPE) to make sure no other failure
conditions can be detected. If failures are detected, use the
diagnostic information associated with those tests to clear the
failure before proceeding.
2. Initiate an SPE interchange using the
reset system interchange
command. This should be done at a time that would cause the least
service disruption since a fault may still exist on the MSSNET circuit
pack. If the system reset command fails, refer to
Failure of Planned
Interchange
in Chapter 5 for further actions.
3. Enter the
test switch-control
command for the Switch Control now
on the active SPE and verify that the Control Channel Transmission
test (#94) passes. If a failure occurs, an automatic SPE interchange
may occur. If an interchange back to the original SPE occurs,
replace the MSSNET board on the standby SPE and go back to
step 1 above. If other failures are detected, use the repair
procedures associated with those tests to clear the failure.
c. A 150 error indicates that a SPE interchange occurred and that the Switch
Control circuit on the MSSNET circuit pack was the cause of the
spontaneous interchange.
1. If other SW-CTL errors are present, investigate those errors
