User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-1397TDM-BUS (TDM Bus)
10
b. This error indicates the TDM Bus is corrupted. If the corruption was on the
Control Channel bus and this system has High or Critical Reliability, TDM
Bus maintenance automatically switches the control channel and/or tones
to the other bus. The same strategy applies if the corruption was on the
bus carrying the tones.
An aux data value of 0 indicates the last reported TDM Bus corruption was
on the Control channel bus.
An aux data value of 1 indicates the last reported TDM Bus corruption was
on the Non-Control channel bus.
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 errors. Under these circumstances do
the following:
■ 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 all the TDM Bus tests pass, the problem has been fixed.
■ If some of the TDM Bus tests fail, replace the Duplication Interface
circuit pack in the A carrier (see Chapter 6, ‘‘
Reliability Systems: A
Maintenance Aid’’ for details). None of the Duplication Interface
circuit pack tests detect this particular type of failure. Therefore, all
its tests may still pass.
■ Test the TDM Bus via the test tdm P command.
■ If all the TDM Bus tests pass, the problem has been fixed.
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.
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.