With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cProxyCallActiveRxAudioBytes
Cisco Proxy Call Active Rx Audio Bytes
1.3.6.1.4.1.9.10.57.1.1.1.1.16
The number of audio bytes received from the remote end for this call.
Back to CISCO-PROXY-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor cProxyCallActiveRxAudioBytes on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.