With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frUniIsdnDataSigChan
Frame Relay Uni Isdn Data Sig Chan
This attribute indicates the instance number of the dataSigChan component controlling the allocation of this FrUni Isdn component.
Back to Nortel-Magellan-Passport-FrameRelayIsdnMIB MIB page.
IPHost Network monitor allows you to monitor frUniIsdnDataSigChan 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.