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24 Overview
Handset switchover
If a user on an active call is moving about, the call switches from AP to AP
in the subnet. This changeover is transparent to the user.
Loss of signal
If a wireless handset is out of range of all APs, it waits 20 seconds for
a signal to return. If a signal is not reacquired within 20 seconds, the
wireless handset loses connection to the Call Server and any calls are
dropped. When the wireless handset comes back into range of an AP, it
reestablishes a connection to the Call Server and goes through the system
registration process.
ATTENTION
If a wireless handset is out of contact with the system for four seconds (worst
case scenario) during UNIStim messaging, a UNIStim failure could occur and
cause the wireless handset to lose the UNIStim association with the Line
Telephony Proxy Server (LTPS).
Nortel Communication Server 1000
WLAN IP Telephony Installation and Commissioning
NN43001-504 03.04 Standard
23 September 2008
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