With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csbCallStatsActiveTranscodeFlows
Cisco Session Border Call Stats Active Transcode Flows
1.3.6.1.4.1.9.9.657.1.2.1.24
This object indicates the current number of transcoded flows that are actively forwarding media traffic. In this context, a flow is a media stream passing through the device. So a single voice call will be counted only once.
Back to CISCO-SESS-BORDER-CTRLR-CALL-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor csbCallStatsActiveTranscodeFlows 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.