With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
dataSigChanNi2ActiveChannels
data Sig Chan Ni2 Active Channels
This attribute indicates the number of currently active channels. This includes data and voice channels.
Back to Nortel-Magellan-Passport-DisdnNI2MIB MIB page.
IPHost Network monitor allows you to monitor dataSigChanNi2ActiveChannels 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.