With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvVoIPPeerCfgCoderMode
Cisco Voice Vo IP Peer Configure Coder Mode
1.3.6.1.4.1.9.9.63.1.2.3.1.30
This object indicates the iLBC codec mode to be used. The value of this object is valid only if cvVoIPPeerCfgCoderRate is equal to 'iLBC'.
Back to CISCO-VOICE-DIAL-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor cvVoIPPeerCfgCoderMode 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.