With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
appnLsActSessCount
appn Ls Act Sess Count
This is the total number of active sessions (both endpoint and intermediate) using this link.
Back to Nortel-Magellan-Passport-AppnMIB MIB page.
IPHost Network monitor allows you to monitor appnLsActSessCount 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.