With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccvpLicRtPortsAvail
Cisco Customer Voice Portal Lic Rt Ports Available
1.3.6.1.4.1.9.9.590.1.2.1
The real-time port licenses available object is a real-time snapshot metric indicating the number of port licenses available for the processing of new calls. Exactly one port license is used per call, independent of the calls traversal of the individual call server subsystems.
Back to CISCO-CVP-MIB MIB page.
IPHost Network monitor allows you to monitor ccvpLicRtPortsAvail 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.