With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cmmcaCmRtNumActiveCalls
Cisco Multi-Modal Contact Applications Cm Rt Num Active Calls
1.3.6.1.4.1.9.9.664.1.6.2.1.1
The real time indicator of the number of active calls.
Back to CISCO-MMODAL-CONTACT-APPS-MIB MIB page.
IPHost Network monitor allows you to monitor cmmcaCmRtNumActiveCalls on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.