Filter
Top Products
SYNC (Port-Network Synchronization)
Issue 1 June 2005 2169
2. Test the active Tone-Clock circuit pack in the master port network using test
tone-clock location long.
Check the Error Log for TDM-CLK errors, and verify that TDM bus Clock Circuit Status
Inquiry test (#148) passes.
If Test #148 fails with Error Code 2–32, see TDM-CLK (TDM Bus Clock)
on page 2252 to
resolve the problem. If not, continue with the following.
3. For duplicated Tone-Clock circuit packs in the master port network, enter set
tone-clock location 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.
S8700 MC
h. This error indicates that the Expansion Interface circuit packs are experiencing timing slips.
This error increases 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)
on page 1176 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 using set tone-clock location. The error count for this error
should start to decrement once the problem is solved. If the count does not decrease
in 15 minutes, the problem still exists.
● If the problem still exists, switch the Tone-Clock in the slave port network back to the
previous configuration, then perform a PNC interchange using reset pnc
interchange.
● If the problem still exists, switch the PNC back to the previous configuration using
reset pnc interchange. Switch the Tone-Clock circuit packs in the master port
network using set tone-clock location.
● If the problem still exists, switch the Tone-Clock circuit packs in the master port
network back to the previous configuration using set tone-clock location.