With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
callActiveTransmitBytes
call Active Transmit Bytes
1.3.6.1.2.1.10.21.1.3.1.1.14
The number of bytes which were transmitted for this call.
Back to DIAL-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor callActiveTransmitBytes 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.