Specifications

SIP Setting

Configure your SIP parameters on this page, and click ‘OK’ to apply them.

SIP, the Session Initiation Protocol, is a signaling 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 hasn’t finished talking to the new caller, he

can resume his conversation with the original caller.

According to the SIP RFC, a proxy server is ‘An 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 the table 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).

Support Call Enables or disables support for call waiting.

Waiting (Default: Disabled)

Proxy Setting Set the proxy settings.

• Proxy IP IP address of your proxy server. (From your Telephony provider.)

• Proxy Port Port number of the proxy server. (From your Telephony provider.)

Registrar Setting Set the registrar settings.

• Registrar IP IP address of SIP registrar.

• Registrar Port Port number of SIP registrar.