With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmeEphoneTotKeyPhRegistered
Cisco Call Manager Express Ephone Total Key Ph Registered
1.3.6.1.4.1.9.9.439.1.2.5
Indicates the total number of Key Cisco IP phones currently registered to this device.
Back to CISCO-CCME-MIB MIB page.
IPHost Network monitor allows you to monitor ccmeEphoneTotKeyPhRegistered on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.