With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cmmcaRtMsgQMemPercentUsage
Cisco Multi-Modal Contact Applications Rt Msg Q Memory Percent Usage
1.3.6.1.4.1.9.9.664.1.4.8
The percentage of available message bus memory in use. All services in CUEA communicate using a message bus.
Back to CISCO-MMODAL-CONTACT-APPS-MIB MIB page.
IPHost Network monitor allows you to monitor cmmcaRtMsgQMemPercentUsage on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.