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MultiVOIP User Guide T1 PhoneBook Configuration
327
Add/Edit Outbound Phone Book: Field Definitions
(cont’d)
Field Name Values Description
SIP Fields
Use Proxy Y/N Select if proxy server is used.
Transport
Protocol
TCP or
UDP
Voip administrator must choose
between UDP and TCP
transmission protocols. UDP is a
high-speed, low-overhead
connectionless protocol where
data is transmitted without
acknowledgment, guaranteed
delivery, or guaranteed packet
sequence integrity. TCP is slower
connection-oriented protocol
with greater overhead, but
having acknowledgment and
guarantees delivery and packet
sequence integrity.
SIP Port
Number
5060 or other
*See RFC3087
(“Control of
Service
Context using
SIP Request-
URI,” by the
Network
Working
Group).
The SIP Port Number is a
UDP logical port number.
The voip will “listen” for SIP
messages at this logical port.
If SIP is used, 5060 is the
default, standard, or “well
known” port number to be
used. If 5060 is not used,
then the port number used is
that specified in the SIP
Request URI (Universal
Resource Identifier).
SIP URL sip.userphone
@
hostserver,
where
“userphone”
is the
telephone
number and
“hostserver”is
the domain
name or an
address on the
network
Looking similar to an email
address, a SIP URL
identifies a user's address.
In SIP communications, each
caller or callee is identified
by a SIP url:
sip:user_name@host_name.
The format of a sip url is very
similar to an email address,
except that the “sip:“ prefix is
used.