What's the use if they "lose connection"? Once they lose connection they can't send any data back until the wireless network is restored.
What can be done is to use SNMP to constantly poll the units. When they loose a certain amount of packets, then the script can raise an alarm.
What I am looking for is for the handset to make a noise of some kind to let the user know that they are out of range or they have walked out of the building with the phone in there pocket.
Now that I have my hands on a 7925G I am unable to get it to make any kind of notification sounds when it goes out of wireless range. Is there a setting that needs to be enabled?