ZyXEL Communications P-2612HW-F1 User Manual page 211

The SIP proxy server forwards the call invitation to C.
2
Figure 118 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, you want to use client device A to call someone who is
using client device C.
Client device A sends a call invitation for C to the SIP redirect server (B).
1
The SIP redirect server sends the invitation back to A with C's IP address (or
2
domain name).
P-2612HW-F1 User's Guide
Chapter 10 Voice
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