With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frMuxRowStatus
Frame Relay Mux Row Status
1.3.6.1.4.1.1570.1.1.1.1
This variable is used as the basis for SNMP naming of frMux components. These components can be added and deleted.
Back to Nortel-Magellan-Passport-FrameRelayMuxMIB MIB page.
IPHost Network monitor allows you to monitor frMuxRowStatus 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.