With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frUniDlciLbLocalDeBytes
Frame Relay Uni Dlci Lb Local De Bytes
This attribute records the number of bytes in frames with the Discard Eligibility (DE) bit set, looped back to the link since the loopback mode was started.
Back to Nortel-Magellan-Passport-FrameRelayUniMIB MIB page.
IPHost Network monitor allows you to monitor frUniDlciLbLocalDeBytes 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 modems right now.