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16.9 SIP Proxy
SIP (Session Initiation Protocol) is a protocol for making real-time calls over IP network. Currently, most of the SIP
extensions address audio communication. WHG-505 can act like a SIP Proxy Server, it forwards end point' requests
and responses. In other words, SIP Proxy server needs to log in the trusted registrar to verify identities of 2 clients.
After enabling SIP proxy server, all SIP traffic pass through NAT with a selective but fixed WAN interface.
In this example, client extension #301 is trying to call #303. WHG-505 asks an external trusted SIP registrar to verify
both identities. After SIP registrar responds with a YES, call is established through WHG-505.
The system provides SIP proxy for SIP clients (devices or soft clients) pass through NAT. After enable SIP proxy
server, all SIP traffic can pass through NAT with a selective but fixed WAN interface. If the SIP Registrar settings in
SIP client is same as the system setting, when the client try to access the SIP Registrar, system will let this client
login automatically and all SIP traffic can pass through.
Configure SIP Trusted Registrar, go to: Users >> Authentication.
SIP: SIP authentication supports 4 Trusted SIP Registrar.
IP Address: The IP address of the Trusted SIP Registrar.
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