Loss Of Signal - Avaya Communication Server 1000 Installation And Commissioning Manual

progress will be dropped when the user moves out of range and the handset must be power
cycled in order to resume functionality in the new subnet area.
Important:
Ensure that all your APs are attached to the same subnet for proper operation. The handset
can change subnets if DHCP is enabled and the handset is powered off then back on when
within range of APs on the new subnet. Note that the wireless telephones cannot roam
across subnets, since they cannot change IP addresses while operational from one subnet
to another, unless assisted by a WLAN controller.

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.
Important:
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).
Avaya WLAN IP Telephony Installation and Commissioning
Handset switchover
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