With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frMuxDlciAbitTable
Frame Relay Mux Dlci Abit Table
1.3.6.1.4.1.1570.1.4.12
This group contains the A-Bit status information for this Dlci.
Back to Nortel-Magellan-Passport-FrameRelayMuxMIB MIB page.
IPHost Network monitor allows you to monitor frMuxDlciAbitTable 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.