
Notes
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The ELAN (Embedded LAN) is a private
management network whilst the TLAN
(Telephony LAN) is connected to the
“Public” side. Telephones maybe
connected to the TLAN directly or to a
network routed from the TLAN
(Sometimes referred to as the CLAN
Customer LAN).
IP Sets need to communicate with the
Call Server to make and receive calls
and this is done by registering with the
Signalling server.
The Signalling server runs several
pieces of software but the sets use the
TPS, Terminal Proxy Server to register
with and to communicate with the call
server. The TPS records the IP address
of the Set and its Virtual TN so the Call
Server can contact it via the VTN.
For an IP to IP call the set will contact
the Call Server via the TPS. The Call
server will look up the VTN of the
destination set and refer it back to the
TPS which will contact the set.
When the call is established the voice
travels directly from IP Set to IP Set and
NOT via the sig server or call server.
10
CS 1000 Rel 7.5 16/04/2013
Copyright Amlex Associates Ltd
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