With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
tdmaBcV42V42ActiveInCall
tdma Bc V42 V42 Active In Call
This attribute indicates whether V42 is really being used in this data call.
Back to Nortel-Magellan-Passport-TdmaIwfMIB MIB page.
IPHost Network monitor allows you to monitor tdmaBcV42V42ActiveInCall 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 speech servers right now.