SYNC (Port-Network Synchronization)
Issue 1 May 2002
8-1529555-233-143
If Test #148 fails with Error Code 2–32, see ‘‘TDM-CLK (TDM Bus
Clock)’’ to resolve the problem. If not, continue with the following
steps.
3. For duplicated Tone-Clock circuit packs in the master port network,
enter set tone-clock UUC command to switch the Tone-Clocks.
For unduplicated Tone-Clock circuit packs in the master port
network of a Stratum-4 (not Stratum-3) system, replace the primary
and secondary (if assigned) DS1 Interface circuit packs.
4. Investigate any other SYNC or STRAT-3 errors.
g. This error indicates that the Expansion Interface circuit packs are
experiencing timing slips. This error will increase the bit error rates for data
transmission between port networks. The Expansion Interface circuit
packs with timing slips have EXP-INTF error 2305.
1. Check the LEDs on the active Tone-Clock circuit packs in the
system and verify that the system is properly synchronized.
2. Verify that all the TDM/LAN Bus cables on the backplane are
marked WP-91716. Also for a Multi-Carrier Cabinet (MCC), check
that the bus terminator type is a ZAHF4 TDM/LAN.
For a Single Carrier Cabinet verify that the bus terminator type is a
AHF110 TDM/LAN.
3. Check for timing loops, and resolve any loops that exist.
4. Check the Error Log for any active as well as resolved Expansion
Interface circuit pack errors and see ‘‘EXP-INTF (Expansion
Interface Circuit Pack)’’ to resolve any errors found.
5. Duplicated Tone-Clock circuit packs in the slave port networks:
■ Interchange Tone-Clock circuit packs in the slave port
networks where EXP-INTF error 2305 also occurs via the set
tone-clock UUC system technician command. The error
count for this particular error should start decrementing once
the problem is solved
—if the count does not decrease in 15
minutes the problem still persists.
■ If the problem still persists, switch the Tone-Clock in the slave
port network back to the previous configuration. Then,
perform a PNC interchange via the reset pnc interchange
command.
■ If the problem still persists, switch the PNC back to the
previous configuration via the reset pnc interchange
command. Then, switch the Tone-Clock circuit packs in the
master port network via set tone-clock UUC.
■ If the problem still persists, switch the Tone-Clock circuit
packs in the master port network back to the previous
configuration via set tone-clock UUC.
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