With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frMuxFramerStateEntry
Frame Relay Mux Framer State Entry
1.3.6.1.4.1.1570.1.2.12.1
An entry in the frMuxFramerStateTable.
Back to Nortel-Magellan-Passport-FrameRelayMuxMIB MIB page.
IPHost Network monitor allows you to monitor frMuxFramerStateEntry 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.