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TDM-BUS (TDM Bus)
Issue 4 May 2002 10-1705 555-233-123
Restarting Nonfunctioning Port Circuit Packs
A defective TDM Bus Control Channel or system timing reference on one of the
networks can result in port circuit packs (that is non-control carrier circuit packs)
on this defective network entering the reset state. When this situation occurs, the
circuit pack stops functioning and its red LED lights. The system does not detect
the presence of a circuit pack when the circuit pack is in the reset state. Hence,
executing the list config board PCSS command indicates that the circuit pack is
not present.
If a circuit pack enters the reset state when the control channel is on TDM Bus PT
(where network P contains the circuit pack), this circuit pack stops functioning until
it receives a restart message when the control channel is on the same TDM Bus
PT or when this circuit pack 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:
NOTE:
A circuit pack functioning normally (that is, not in the reset state) ignores the
restart message.
Procedure 1 (Nondestructive)
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. If using this method is not feasible, try the other
procedures in this section.
Procedure 2 (Non-Destructive)
if you are at the site: Reseat the circuit pack. This action causes the circuit pack
that was in the reset state to begin functioning on the current Control Channel
bus.
Procedure 2 (Nondestructive)
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. If using this method is not feasible, try the other
procedures in the section.