SMC Networks Barricade SMC7908VoWBRA User Manual page 110

C
ONFIGURING THE
Parameter
Registrar Port
Re-Registration Time Interval The time to re-register with the registrar server.
SIP, the Session Initiation Protocol, is a signaling protocol for Internet
conferencing, telephony, presence, events notification and instant
messaging.
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 that is
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."
4-74
V ADSL R
OICE
Description
Enter the Registrar port number provided by your
VoIP service provider. In most cases this is port
5060 but check with your provider to confirm.
OUTER