With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmeEphoneObservedType
Cisco Call Manager Express Ephone Observed Type
1.3.6.1.4.1.9.9.439.1.2.6.1.11
Type and model of Cisco IP phone received by this device during the registration of IP phone.
Back to CISCO-CCME-MIB MIB page.
IPHost Network monitor allows you to monitor ccmeEphoneObservedType 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.