Maintenance Object Repair Procedures
555-233-123
10-1704
Issue 4 May 2002
Procedure 4
Procedure 4 attempts to isolate the failure to a particular set of carriers, and then
checks only the circuit packs in those carriers. This procedure involves
terminating the TDM Bus so that certain carriers are disconnected from the TDM
Bus. This is done by moving the TDM Bus terminators (AHF1) on the carrier
backplane. To terminate a TDM Bus at the end of a particular carrier, the TDM Bus
cable that connects the carrier to the next carrier should be unplugged and
replaced with the TDM Bus terminator. The TDM Bus terminators can be taken
from one carrier to the other. To get to the TDM Bus cables, remove the back
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.
Summary of Contents for Definity SI
Page 1: ...0DLQWHQDQFH IRU YD D 1 7 6HUYHU 6 Volumes 1 2 and 3 555 233 123 Issue 4 May 2002...
Page 62: ...Maintenance Architecture 555 233 123 1 26 Issue 4 May 2002...
Page 92: ...Management Terminals 555 233 123 3 26 Issue 4 May 2002...
Page 204: ...Routine Maintenance Procedures 555 233 123 5 100 Issue 4 May 2002...
Page 250: ...LED Interpretation 555 233 123 7 10 Issue 4 May 2002...
Page 2804: ...Maintenance Object Repair Procedures 555 233 123 10 2018 Issue 4 May 2002...