Howdy,
We're trying to line timing four Nortel DMS-500 SPM modules with four OC-3 multiplexers in a bidirectional protection mode terminal application.
For this application the OC-3 multiplexer is externally timed off a 1.544 BITS clock [pri/sec] and OC-3 line timing this group of four DMS-500 SPM modules. This is the only way to clock these SPMs.
The OC-3 multiplexers DS-1 drops will feed voice, PRI, BRI, etc to local customers from this C.O.
The DMS-500 SPMs are continuously reporting alarms relating to synchronization failures, protection switches, synchronization success achieved, etc, over and over again from copies 0->1 and 1->0 on the OC-3 feeds from the multiplexer to the SPM modules.
These OC-3 muxes were tested interfacing a Cisco 15454 ONS (OC-3 trunks from another node) and the 15454 did not report any sync problems.
Is there any on-line documentation explaining in more detail DMS-500 SPM logging regarding synchronization problems? Specifically why a particular sync error occurred?
Thanks in advance, C:\\
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