With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frMuxStateTable
Frame Relay Mux State Table
1.3.6.1.4.1.1570.1.11
This group contains the three OSI State attributes and the six OSI Status attributes. The descriptions generically indicate what each attribute implies about the component. Note that not all the values and state combinations described here are supported by every component which uses this group. For component-specific information and the valid state combinations, refer to NTP 241- 7001-150, Passport Operations and Maintenance Guide.
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IPHost Network monitor allows you to monitor frMuxStateTable 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.