With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cProxyCallHistoryAudioUDPPort
Cisco Proxy Call History Audio UDP Port
1.3.6.1.4.1.9.10.57.1.2.1.1.3
Remote system UDP listener port to which to transmit voice packets for the call. A value of zero indicates that no port was used.
Back to CISCO-PROXY-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor cProxyCallHistoryAudioUDPPort on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.