With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
appnMaximumIsrSessions
appn Maximum Isr Sessions
This attribute represents the maximum number of ISR sessions this node can participate in at once. The minimum value is 100.
Back to Nortel-Magellan-Passport-AppnMIB MIB page.
IPHost Network monitor allows you to monitor appnMaximumIsrSessions 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.
