With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
appnCnNumberActivePorts
appn Cn Number Active Ports
This attribute specifies the number of active ports under this ConnectionNetwork.
Back to Nortel-Magellan-Passport-AppnMIB MIB page.
IPHost Network monitor allows you to monitor appnCnNumberActivePorts 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 multiplexers right now.