With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
csbCurrPeriodicStatsDtmfIwInbandCalls
Cisco Session Border Curr Periodic Stats Dtmf Iw Inband Calls
1.3.6.1.4.1.9.9.657.1.3.1.41
This object indicates the number of active calls through this adjacency or account for which DTMF interworking is enabled between DTMF in signaling and DTMF in media via inband DTMF tones during this interval.
Back to CISCO-SESS-BORDER-CTRLR-CALL-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor csbCurrPeriodicStatsDtmfIwInbandCalls 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.