363-206-285
Transmission and Synchronization Interfaces
5-38 Issue 3 June 2001
Figure 5-21. Synchronization Reconfiguration — Access Ring
Synchronization Provisioning Integrity 5
A welcomed side feature of synchronization messaging is that it helps prevent
provisioning errors. Provisioned timing loops on the DDM-2000 OC-3 Multiplexers
will be quickly detected through the synchronization messaging algorithm and
prevented by forcing a shelf into holdover. The system can then be reprovisioned
correctly.
PRS
Traceable
BITS
Normal
DDM-2000
DDM-2000
DDM-2000
PRS
Traceable
BITS
DDM-2000
DDM-2000
Sync Flow
DDM-2000 DDM-2000 DDM-2000
Failure/Reconfiguration