With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gsmCsLpActiveCalls
gsm Cs Lp Active Calls
This attribute indicates the number of GsmIwfBearerChannel components currently active on this LogicalProcessor.
Back to Nortel-Magellan-Passport-GsmIwfMIB MIB page.
IPHost Network monitor allows you to monitor gsmCsLpActiveCalls 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 switches right now.