With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
callActiveEntry
call Active Entry
1.3.6.1.2.1.10.21.1.3.1.1
The information regarding a single active Connection. An entry in this table will be created when a call is started. An entry in this table will be deleted when an active call clears.
Back to DIAL-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor callActiveEntry 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.