With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vsrSvsFramerAudioCells
VoiceRoute Svs Framer Audio Cells
1.3.6.1.4.1.562.2.4.1.117.2.2.15.1.2
This attribute counts the total number of cells containing audio data received from the interface while the channel was seized. A CCS channel is always considered to be seized. Audio data includes cells containing voice as well modem audio, but not silence. A cell contains 44 bytes of data from the DS0 channel(5.5 ms). This flow is measured before compression is performed on the channel. This counter wraps to zero after reaching its maximum value.
Back to Nortel-Magellan-Passport-VoiceNetworkingMIB MIB page.
IPHost Network monitor allows you to monitor vsrSvsFramerAudioCells 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.