Polycom SpectraLink 1725-36033-001 Administration Manual page 9

SpectraLink 8000 SVP Server Overview
telephones, and between the SVP Server and the PBX (or other far-end
device).
SVP Server availability
A SpectraLink handset registers to a single SVP Server the first time it
is powered on. Once the handset has contacted this Registration
Server, it obtains a list of all SVP Servers in the system. The handset
then maintains this list in non-volatile memory and updates it only
when rebooted. When a handset later attempts to check in and cannot
contact the ordained Registration Server, it will then fall back to its list
of other Servers and attempt to check in elsewhere. After the handset
has successfully checked into the system once, it never requires that
the Registration Server be present unless the handset is reconfigured
back to factory defaults, or the entire system of SVP Servers is
changed out. See section Swapping/Adding/Deleting SVP Servers.
Registration Server identification
The handsets identify the SVP Server in three possible ways. These
are outlined in the Administration and Configuration document for the
handset model(s) and the IP protocol being used in your facility.
Essentially, the SVP Server can be identified by a static IP address in
the Admin menu, by a DHCP option 151 specification, or by a DNS
query of "SLNKSVP2". The address found identifies the Registration
Server.
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