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E1 Phonebook Configuration MultiVOIP User Guide
286
PhoneBook Configuration Parameter Definitions
(cont’d)
Field Name Values Description
Proxy Server Parameters
Enable Proxy Y/N
Proxy Server
IP Address
n.n.n.n
where
n=0-255
Network address of the proxy
server that the voip is using.
Port Number Logical port number for proxy
communications.
H.323 Version 4 Parameters
Q.931
Multiplexing
(Mux)
Y/N Signalling for multiple phone
calls can be carried on a single
port rather than opening a
separate signalling port for
each call. This conserves
bandwidth resources.
H.245
Tunneling
(Tun)
Y/N H.245 messages are
encapsulated within the Q.931
call signalling channel.
Among other things, the H.245
messages let the two endpoints
tell each other what their
technical capabilities are and
determine who, during the
call, will be the client and who
the server. Tunneling is the
process of transmitting these
H.245 messages through the
Q.931 channel. The same
TCP/IP socket (or logical port)
already being used for the Call
Signalling Channel is then also
used by the H.245 Control
Channel. This encapsulation
reduces the number of logical
ports (sockets) needed and
reduces call setup time.