With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgkHistoryEventEndpointH323id
Cisco Gatekeeper History Event Endpoint H323id
1.3.6.1.4.1.9.10.40.1.2.2.1.8
The H323 ID of the endpoint associated with the register or unregister event. This field is not valid for other event types.
Back to CISCO-GATEKEEPER-MIB MIB page.
IPHost Network monitor allows you to monitor cgkHistoryEventEndpointH323id 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.