With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frMuxDlciFecnFrmToIf
Frame Relay Mux Dlci Fecn Frm To If
1.3.6.1.4.1.1570.1.4.13.1.7
This attribute counts the frames sent to the interface with the Forward Explicit Congestion Notification (FECN) bit set. When the count reaches maximum it wraps to zero.
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IPHost Network monitor allows you to monitor frMuxDlciFecnFrmToIf 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 secure routers right now.