With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoUnityEventDescription
cisco Unity Event Description
1.3.6.1.4.1.9.9.385.1.3.8
The event description indicates what happened or the significance of the event.
Back to CISCO-UNITY-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoUnityEventDescription on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.