With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frUniDlciLbRemoteBecnFrm
Frame Relay Uni Dlci Lb Remote Becn Frm
This attribute records the number of frames with the Backward Explicit Congestion Notification (BECN) bit set, looped back to the subnet since the loopback mode was started.
Back to Nortel-Magellan-Passport-FrameRelayUniMIB MIB page.
IPHost Network monitor allows you to monitor frUniDlciLbRemoteBecnFrm 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 multiplexers right now.