With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frMuxCidDataTable
Frame Relay Mux Cid Data Table
1.3.6.1.4.1.1570.1.10
This group contains the attribute for a component's Customer Identifier (CID). Refer to the attribute description for a detailed explanation of CIDs.
Back to Nortel-Magellan-Passport-FrameRelayMuxMIB MIB page.
IPHost Network monitor allows you to monitor frMuxCidDataTable 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.