With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccmInActivePhones
Cisco Call Manager In Active Phones
1.3.6.1.4.1.9.9.156.1.5.2
The number of phones that are registered with the Call Manager but have lost contact with the CallManager. The phones are said to have lost contact with the CallManager if the CallManager does not receive any keepalives.
Back to CISCO-CCM-MIB MIB page.
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