With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frNniLtsTimeInterval
Frame Relay Nni Lts Time Interval
This attribute specifies the time interval to the specified number of seconds. Granuality is in centiseconds. Maximum is 1 minute.
Back to Nortel-Magellan-Passport-FrameRelayNniMIB MIB page.
IPHost Network monitor allows you to monitor frNniLtsTimeInterval 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 multiplexers right now.