With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvH320CallHistoryTable
Cisco Visual H320 Call History Table
1.3.6.1.4.1.9.10.128.1.1.1
This table is the H.320 extension to the call history table of IETF Dial Control MIB. It contains H.320 call leg information about specific voice encapsulation call with H.320 setup.
Back to CISCO-H320-DIAL-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor cvH320CallHistoryTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.