With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frDteStDlciHqQueueByteThreshold
Frame Relay Dte St Dlci Hq Queue Byte Threshold
This attribute is the maximum number of bytes allowed in the queue based on maxMsecData and the transmit data rate.
Back to Nortel-Magellan-Passport-FrameRelayDteMIB MIB page.
IPHost Network monitor allows you to monitor frDteStDlciHqQueueByteThreshold 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.