With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
aal1CesLCoPathUpDateTime
aal1 Ces L Co Path Up Date Time
This is the time stamp when the current path was established or reestablished.
Back to Nortel-Magellan-Passport-CircuitEmulationServiceMIB MIB page.
IPHost Network monitor allows you to monitor aal1CesLCoPathUpDateTime 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.