SpectraLink Corporation
Installation, Setup, and Maintenance
NetLink SVP Server
Part Number: 72-0178-00-J.doc
Page 9
2.2 The Timing Function
In the NetLink Gateway environment, SVP Servers provide the "timing" function for
active calls. In multiple SVP Server environments, the active calls are distributed across
the SVP Servers. In the IP PBX environment, SVP Servers provide both the connection
or "gateway" to the IP PBX for the Wireless Telephones and the "timing" function for
active calls. This "gateway" function is distributed across the SVP Servers.
In both environments, the number of active SVP Servers is determined dynamically.
Whenever SVP Servers are added to or removed from the system, the distribution of
"timing" function for active calls, as well as the "gateway" function in the IP PBX
environment, is affected.
In a NetLink Gateway environment, the addition of an SVP Server is detected as soon as
the new SVP Server is up and running. The new SVP Server will immediately start
providing the “timing” function for the appropriate Wireless Telephones. The user should
not detect any change. The removal of an SVP Server is detected within one minute.
During this time, any Wireless Telephone that was using the SVP Server that was
removed will be affected. If the Wireless Telephone was not in a call, it may lose contact
with its Gateway, resulting in a check-out/check-in sequence. If the Wireless Telephone
was in a call, the audio will be lost and the call will be dropped.
2.3 Internal
Gatekeeper
A gatekeeper is required in certain H.323 protocol systems. The gatekeeper that resides
on the SVP Server is designed for small applications using the NetLink Wireless
Telephones under the H.323 protocol as explained in
NetLink e340/i640 Wireless
Telephone—With ITU H.323 Protocol: Setup and Maintenance
.
The internal gatekeeper is not designed to scale beyond the capacity of a single SVP
Server and does not provide the advanced features required for larger installations. It has
a limit of 1000 registration records.