With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvcLastRegisteredTime
cvc Last Registered Time
1.3.6.1.4.1.9.9.393.1.3.1.1.5
The time the port last registered with the call agent.
Back to CISCO-VOICE-CONNECTIVITY-MIB MIB page.
IPHost Network monitor allows you to monitor cvcLastRegisteredTime on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.