With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frMuxDlciIndex
Frame Relay Mux Dlci Index
1.3.6.1.4.1.1570.1.4.1.1.10
This variable represents the index for the frMuxDlci tables.
Back to Nortel-Magellan-Passport-FrameRelayMuxMIB MIB page.
IPHost Network monitor allows you to monitor frMuxDlciIndex 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.