With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csbCallStatsUsedFlows
Cisco Session Border Call Stats Used Flows
1.3.6.1.4.1.9.9.657.1.2.1.7
This object indicates the number of media flows which are used. This is for the flow allocated and connected. The flow allocated but not connected is not counted.
Back to CISCO-SESS-BORDER-CTRLR-CALL-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor csbCallStatsUsedFlows 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.