With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frUniSigLastDlciWithMsgBlockCongestion
Frame Relay Uni Sig Last Dlci With Msg Block Congestion
This attribute shows the value of the DLCI that has most recently failed to get a message block due to message block congestion. The initial value of this attribute is 0.
Back to Nortel-Magellan-Passport-FrameRelayUniMIB MIB page.
IPHost Network monitor allows you to monitor frUniSigLastDlciWithMsgBlockCongestion 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.