DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1713TDM-BUS (TDM Bus)
9
2. Determine if the TDM Bus fault is still present by running the
test tdm P
command.
If the
shortened
TDM Bus does not extend to a carrier that contains the
Tone Detector circuit pack, the non-control channel test (#297) will not be
able to run and the bus that the non-control channel was on will not be
tested. If this is the case, run the
set TDM PC
command to move the
control channel to the non-active Bus. The
status port-network P
command will show which Bus is currently active. After the Bus switch has
occurred, run the
test tdm P
command again to determine if the newly
active Bus is faulted.
Another option in an EPN is to move a Tone Detector circuit pack to an
empty slot (if one is available) in the carrier where the TDM bus is
terminated. This would allow both the control channel and non-control
channel tests to run and would not require that the
set tdm P
command
be run.
3. If none of the TDM Bus tests fail, extend the TDM Bus to another carrier,
and repeat the procedure in the previous step. When a carrier that causes
the fault to recur is added, perform Procedure 2 for only the circuit packs
in that carrier.
4. If any of the TDM Bus test fail, and Procedures 2 and 3 have not resolved
the problem, the added carrier(s) are defective and must be replaced.
Restarting Non-functioning Port Circuit Packs
A defective TDM Bus Control Channel or system timing reference on one of the
networks can result in port circuit packs (those not on a control carrier) on this
port network entering the reset state. When this situation occurs, the circuit pack
will stop functioning and its red LED will light. The system will not detect the
presence of a circuit pack when the circuit pack is in the reset state. Hence,
executing the
list config board
command will indicate that the circuit pack is not
present.
If a circuit pack enters the reset state it will remain out of service until it receives a
restart message form the control channel on the same TDM Bus, A or B, that was
active when it reset, or until it is powered up again.
To force the system to send a restart message to all circuit packs on a network,
try one of the following methods, depending on the circumstances. A circuit pack
that is functioning normally (is not in the reset state) will ignore the restart
message.
Procedure 1 (Non-destructive)
Execute the Idle Time Slot Test (#294) by issuing the command test tdm P when
the control channel is on the same TDM Bus as it was when the circuit pack
entered the reset state.
