With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vsrSvsCallType
VoiceRoute Svs Call Type
1.3.6.1.4.1.562.2.4.1.117.2.12.1.3
This attribute indicates the type of call that this channel is currently carrying. If no call is active, then it displays the value for the last call.
Back to Nortel-Magellan-Passport-VoiceNetworkingMIB MIB page.
IPHost Network monitor allows you to monitor vsrSvsCallType 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 secure routers right now.