Avaya Definity SI, Maintenance Manual, Page: 2025 / 2968

PI-LINK (Processor Interface Link)
Issue 4 May 2002 10-1239 555-233-123
5. If link was never brought up:
a. Verify that the administration is correct as follows:
— Enter the display ds1 PCSS command. Check the
compatibility of the DS1 parameters with the far-end and the
CSU.
— Enter display communication-interface links command.
— Enter the display communication-interface
processor-channels command. Enter the display
communication-interface hop-channels command (if
hop-channels are being used).
— Enter the display trunk <grp>/<mbr> command (if DS1 is
being used for DCS).
— Enter the status sync command (if DS1 is being used)—
make sure the primary synchronization is administered.
6. If link is an EIA link:
— Verify via the Communication-Interface Links form that the
information for the EIA connection is correct on the local and remote
PBXs.
7. Try to isolate the problem in the link if hardware is at fault. Test the link via
the test link lnk-no long system technician command.
a. If Test #182 fails three times, replace the TN765 circuit pack. Refer
to Chapter 6, ‘‘Reliability Systems: A Maintenance Aid’’ .
b. If Test #182 passes and Test #183 fails, replace the TN754 or
TN784 Digital Line or the TN722 or TN767 DS1 Interface circuit
pack, whichever is used in the link. If Test #183 still fails, replace the
TN765 PI-BD. Refer to
Chapter 9, ‘‘Packet Bus Fault Isolation and
Correction’’ .
8. If the preceding tests pass:
Check the physical transmission link:
a. Are all the circuit packs physically installed?
b. Are the cables still connected throughout?
c. Check DS1-BD error section for possible connectivity problems if
DS1-BD is used in link connection.
d. Check CSU options.
9. Finally, restart the Processor Interface circuit pack via reset interface
PCS. This resets the circuit pack and restarts ALL the links on it.