With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csbCurrPeriodicStatsActiveCalls
Cisco Session Border Curr Periodic Stats Active Calls
1.3.6.1.4.1.9.9.657.1.3.1.2
This object indicates the number of calls that have become active during this interval.
Back to CISCO-SESS-BORDER-CTRLR-CALL-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor csbCurrPeriodicStatsActiveCalls 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.
