With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmeEphoneTotKeyPhConfigured
Cisco Call Manager Express Ephone Total Key Ph Configured
1.3.6.1.4.1.9.9.439.1.2.4
Indicates the total number of configured Cisco IP phones that are marked as Key phones on this device.
Back to CISCO-CCME-MIB MIB page.
IPHost Network monitor allows you to monitor ccmeEphoneTotKeyPhConfigured on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.