With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
traceSessionX25VcStartTime
trace Session X25 Vc Start Time
1.3.6.1.4.1.562.2.4.1.106.3.2.2.11.1.5
This attribute displays the start time of this interval period. If Vc spans 12 hour time or time of day change startTime reflects new time as recorded at 12 hour periods or time of day changes.
Back to Nortel-Magellan-Passport-X25TraceRcvrMIB MIB page.
IPHost Network monitor allows you to monitor traceSessionX25VcStartTime 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.