With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoUnityLicVPIMIsLicensed
cisco Unity Lic VPIM Is Licensed
1.3.6.1.4.1.9.9.385.1.2.18
This indicates whether or not VPIM is licensed for this server.
Back to CISCO-UNITY-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoUnityLicVPIMIsLicensed 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.
