With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
appnActiveLinkStations
appn Active Link Stations
This attribute indicates the number of link stations (for GSVCs, Frame Relay PVCs and SVCs) on the Appn node at the time of the query.
Back to Nortel-Magellan-Passport-AppnMIB MIB page.
IPHost Network monitor allows you to monitor appnActiveLinkStations 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.