Avaya S8700 Maintenance Manual page 422

Maintenance Object Repair Procedure
If this error is logged on both TDM buses (A and B) on the PPN within two
or three minutes, the red LED of several circuit packs may or may not be lit
and there could be Switch Control (SW-CTL) errors. Under these
circumstances do the following:
c. This error indicates the TDM bus was switched to the other bus due to
TDM bus corruption. The aux data value is not meaningful and no action is
required. Look for other TDM-BUS errors to determine the cause of this
error.
d. This error indicates that some time slots are corrupted in the specified TDM
bus. The Minor alarm is raised when there are more than 50 bad time slots
in the bus. The aux data indicates the number of bad time slots found by
the test.
e. This error indicates that some time slots are corrupted in the specified TDM
bus. The Warning alarm is raised when there are more than 10 bad time
slots but less than or up to 50 bad ones in the bus. The aux data value
indicates the number of bad time slots found by the test.
f. This error indicates the idle time slot test found less than 10 bad time slots
in the TDM bus. The aux data value indicates the number of bad time slots
found by the test. There is no alarm associated with this error.
g. This error indicates that the daily TDM bus switch was not successful. The
Switch Control (PPN) or active Expansion Interface (EPN) cannot talk on
the bus that software was trying to switch into. There is no alarm
associated with this error.
h. These errors indicate communication problems which may be causing
message loss. TDM bus maintenance may switch the Control Channel bus
and/or Tone bus to the other bus. Test the TDM bus via the test tdm P
command and follow the procedures according to the error codes reported
from the test. The aux data value shows the Angel ID number for which a
downlink message was lost.
8-1118 Issue 1 May 2002
Display the Hardware Error Log via the display errors command
and look for SW-CTL (Switch Control) errors.
If there are any errors logged against the Switch Control, try to
resolve them.
Test the TDM bus via the test tdm P command.
If every TDM-bus test passes, the problem has been fixed.
555-233-142