DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1716TDM-BUS (TDM Bus)
9
h. These errors indicate communicat ion problems which may b e causing
message loss. TDM Bus maintenance may switc h 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 p rocedures acc ording to the error cod es
reported from the test. The aux data value shows the Angel id number for
which a downlink message wa s lost.
Technician-Demanded Tests:
Descriptions and Error Codes
Always investigate tests in the order p resented in the table b elow. 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 to ld to listen to idle time slots
and if it detects any noise on a time slot, it returns a failure. At the end of the test,
any out-of-service time slots are retested to see if they are still noisy and restored
to service if they are idle. After all the time sl ots have been tested, maintenanc e
counts the number of bad time slots and reports the numb er to the technician in
the error code field. No more than 220 time slots wi ll be taken out-of-service on
one bus and no more than 300 will b e taken out-of-service on both b uses at one
time.
Order of Investigation Short Test
Sequence Long Test
Sequence D/ND1
1. D = Destructive; ND = Nondestruc tive
Control Channel Test on the Contr ol
Channel Bus (#296) X X ND
Digit Detection Test on the Non-Control Channel Bus
(#297) XXND
Idle Time Slot Test (#294) X X ND