With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
dclActiveSpeechCalls
dcl Active Speech Calls
This attribute indicates the number of speech calls that are currently in progress on this DcmeLink.
Back to Nortel-Magellan-Passport-DcmeMIB MIB page.
IPHost Network monitor allows you to monitor dclActiveSpeechCalls 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.