Belkin BoB User Manual page 48

Chapter 5 : Advanced Setup
BoB Advanced Setup Method
TM
SIP Setting
Configure your SIP parameters on this page, and click 'SAVE SETTINGS' to apply them.
SIP, the Session Initiation Protocol, is a signalling
protocol for Internet conferencing, telephony,
presence, events notification and instant messaging.
The call waiting feature allows the user to take an
incoming call, even though the user is already on the
phone. The user upon hearing the new call can put
the original caller on hold and speak to the new caller.
When the user has finished talking to the new caller,
he can resume his conversation with the original
caller.
According to the SIP RFC, a proxy server is ' A n
intermediary entity that acts as both a server and a
client for the purpose of making requests on behalf of
other clients. A proxy server primarily plays the role of
routing, which means its job is to ensure that request
is sent to another entity 'closer' to the targeted user.'
The proxy server therefore, is an intermediate device
that receives SIP requests from a client and then
forwards the requests on the client's behalf. Proxy
servers receive SIP messages and forward them to
the next SIP server in the network. A series of proxy
and redirect servers receive requests from a client
and decide where to send these requests. Proxy
servers can provide functions such as authentication,
authorization, network access control, routing, reliable
request retransmission, and security.
From the SIP RFC, ' A registrar is a server that accepts
REGISTER requests and places the information it
receives in those requests into the location service
for the domain it handles.'
See below for a description of the parameters.
Parameter Description
SIP Listen Port: It is strongly recommended that you
to leave the SIP port unchanged (Default: 5060).
Proxy Setting set the proxy settings.
• Proxy IP: IP address of your proxy server. (From your
VoIP provider)
• Proxy Port: Port number of the proxy server. (From
your VoIP provider)
• Registrar Setting set the registrar settings.
• Registrar IP: IP address of SIP registrar.
• Registrar Port: Port number of SIP registrar.
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