With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
ipivcLcnVcSegmentsRx
ipivc Logical Channel Number Vc Segments Rx
This attribute displays the number of segments received at the time command was issued. This is the segment received count maintained by accounting at each end of the Vc. This counter is updated only when the packet cannot be successfully delivered out of the sink Vc and to the sink AP Conditions in which packets may be discarded by the sink Vc include: missing packets due to subnet discards, segmentation protocol violations due to subnet discard, duplicated and out-of-ranged packets and packets that arrive while Vc is in path recovery state.
Back to Nortel-Magellan-Passport-IpiVcMIB MIB page.
IPHost Network monitor allows you to monitor ipivcLcnVcSegmentsRx on Allied Telesis device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Nortel modems right now.