With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvVoIPCallActiveChannels
Cisco Voice Vo IP Call Active Channels
1.3.6.1.4.1.9.9.63.1.3.2.1.40
The object indicates the number of audio channels. Supported value is 1. This object is not instantiated when the object cvVoIPCallActiveCoderTypeRate is not equal to gsmAmrNb enum.
Back to CISCO-VOICE-DIAL-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor cvVoIPCallActiveChannels on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.
