With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ctpcDuration
ctpc Duration
1.3.6.1.4.1.9.9.644.1.4.8.1.7
This object specifies the elapsed time since the call established.
Back to CISCO-TELEPRESENCE-CALL-MIB MIB page.
IPHost Network monitor allows you to monitor ctpcDuration 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.