With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cSipMediaStreamType
Cisco Sip Media Stream Type
1.3.6.1.4.1.9.9.995.1.1.4.1.4
This object identifies the type of the Media Stream. 'voiceOnly' - Voice-only media streams send all audio from the DS0 channel. 'dtmfRelay' - Dual Tone Multi Frequency Tones. 'voiceAndDtmfRelay' - Send both encoded voice and DTMF-relay packets.
Back to CISCO-SIP-CALLS-MIB MIB page.
IPHost Network monitor allows you to monitor cSipMediaStreamType on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.