With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vsrStatsEntry
VoiceRoute Stats Entry
1.3.6.1.4.1.562.2.4.1.117.15.1
An entry in the vsrStatsTable.
Back to Nortel-Magellan-Passport-VoiceNetworkingMIB MIB page.
IPHost Network monitor allows you to monitor vsrStatsEntry 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.