Polycom SpectraLink 1725-36033-001 - Manual (Page 38)

SpectraLink 8000 SVP Server: Administration Guide for SIP
38 PN: 1725-36033-001_G.doc
become idle once all calls are ended and idle handsets are registered
to other SVP Servers. Once all handsets have been moved---as
evidenced by the number of Telephones in Use on the Network Status
screen---the idle SVP Server may be unplugged and removed from
the system.
During this process, there is a short period where a handset registered
on a locked SVP Server may attempt to initiate a call before it is re-
registered to another SVP Server. In this case, if there is an unlocked
SVP Server in the cluster, the SVP Server will tell the handset to
reboot. As it reboots, the handset will check-in with an available SVP
Server and the user may then start a call. Handsets registered on
unlocked SVP Servers are not affected.
Of course if a system only has one SVP Server, no calls will be
possible until the removed SVP Server is replaced.
SVP Server Failure
If an SVP Server becomes unable to manage calls or fails, any handset
registered to that SVP Server loses service (and any calls) and will
reboot within 30 seconds. After rebooting, the handset will register
with another SVP (if there is one available) and be able to make new
calls. Handsets not registered on the failed SVP may experience a few
seconds of disruption in audio but are otherwise unaffected.