DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page10-1398TDM-BUS (TDM Bus)
10
g. These errors indicate communication problems. On a High or Critical
Reliability system, 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.
System Technician-Demanded Tests:
Descriptions and Error Codes
Always investigate tests in the order presented in the table below when
inspecting errors in the system. By clearing error codes associated with the

Control Channel Test

, for example, you may also clear errors generated from
other tests in the testing sequence.
Idle Time Slot Test on TDM Bus A or B (#294)
The Idle Time Slot Test detects noisy time slots on the bus and takes them
out-of-service. The Tone Detector circuit pack is told to listen to idle time s lots
and if it detects an y noise on a time slo t, it returns a fail ure. At the end of the test,
any out-of-service time slots are retested to see if they are still noisy and res tored
to service if they are idle. After all the time slots have been tested, maintenance
counts the number of bad time slots and reports the number to the technician in
the error code field. No more than 220 time slots are taken out-of-service on one
bus, and no more than 300 are taken out-of-service on b oth buses at one time.
1. D = Destructive; ND = Nondestructive
Order of Investigation Short Test
Sequence Long Test
Sequence D/ND1
Control Channel Test on the Control
Channel Bus (#296) X X ND
Digit Detection Test on the Non-Control
Channel Bus (#297) X X ND
Idle Time Slot Test on TDM Bus A (#294) X X ND