Sip Redirect Server; Figure 169 Sip Proxy Server - Nortel 222 User Manual

340 Appendix M SIP

Figure 169 SIP Proxy Server

SIP Redirect Server

A SIP redirect server accepts SIP requests, translates the destination address to an
IP address and sends the translated IP address back to the device that sent the
request. Then the client device that originally sent the request can send requests to
the IP address that it received back from the redirect server. Redirect servers do
not initiate SIP requests.
In the following example, client device A calls someone who is using client
device C.
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Client device A sends a call invitation for C to the SIP redirect server (B).
The SIP redirect server sends the invitation back to A with C's IP address (or
domain name).
Client device A then sends the call invitation to client device C.