is it possible to play an beep or something else on the 7921/7925 if the phone is leaving the wireless service are?
http://www.cisco.com/en/US/docs/voice_ip_comm/cuipph/7925g/7_0/english/administration/guide/7925usr.html, just search for out-of-range alert
Correct. This is documented in the 7925G Deployment Guide as well, where this option is configured per phone in the Cisco CUCM.
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