With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cbQosIPHCRtpCmprsOutPktOverflow
Cisco Class Based Qos IPHC Rtp Сompress Out Packet Overflow
1.3.6.1.4.1.9.9.166.1.23.1.1.4
The upper 32 bits count of outbound compressed UDP/RTP packets.
Back to CISCO-CLASS-BASED-QOS-MIB MIB page.
IPHost Network monitor allows you to monitor cbQosIPHCRtpCmprsOutPktOverflow on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.