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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-1394TDM-BUS (TDM Bus)
10
cover of the cabinet. When the length of the TDM Bus is modified via this
procedure, the circuit packs that are essential to system operation and TDM Bus
maintenance (for example, Network Control circuit pack, Tone-Clock circuit
pack, Tone Detector circuit pack) must still be connected to the new
shortened
TDM Bus.
For the Processor Port Network (PPN)
1. Terminate the TDM Bus so that it extends within the active control carrier.
2. Run the test tdm system technician command. If any of the TDM Bus tests
fail, perform Procedure 2 and/or Procedure 3 for only the circuit packs in
those carriers connected to the
shortened
TDM Bus. Procedure 2 is
performed for port circuit packs (purple slots) and Procedure 3 for control
carrier circuit packs.
3. If none of the TDM Bus tests fail, extend the TDM Bus to another carrier
and repeat this procedure. When a carrier is added that causes some of
the TDM Bus tests to fail, perform Procedure 2 and/or Procedure 3 for only
the circuit packs in that carrier.
For the Expansion Port Network (EPN)
1. Terminate the TDM Bus so that it only extends within the carrier containing
the active Expansion Interface (EXP-INTF) circuit pack.
2. Run the test tdm system technician command. If any of the TDM Bus tests
fail, perform Procedure 2 and/or Procedure 3 for only the circuit packs in
those carriers connected to the shortened TDM Bus.
3. If none of the TDM Bus tests fail, extend the TDM Bus to another carrier
and repeat this procedure. When a carrier is added that causes some of
the TDM Bus tests to fail, perform Procedure 2 and/or Procedure 3 for only
the circuit packs in that carrier.
If the above steps fail to identify a particular circuit pack or slot, the problem may
be caused by a TDM Bus common component such as the termination resistors
on the ends of the bus.
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