With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
sigChanEIsdnNonCallAssocSessionsToIf
sig Chan E Isdn Non Call Assoc Sessions To If
1.3.6.1.4.1.562.2.4.1.115.14.15.1.4
This attribute counts the total number of non call-associated sessions that have been made to the interface. The value wraps to zero when it exceeds its maximum.
Back to Nortel-Magellan-Passport-VnetEuroIsdnMIB MIB page.
IPHost Network monitor allows you to monitor sigChanEIsdnNonCallAssocSessionsToIf 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 switches right now.