Zyxel-communications 802.11g Wireless ADSL2+ 4-port VoIP IAD P-2602HWNL Uživatelský manuál stáhnout pdf (Strana 168)

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P-2602HWNLI User’s Guide

168 Chapter 11 Voice

Figure 90 SIP Proxy Server

11.2.3.3 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.

1 Client device A sends a call invitation for C to the SIP redirect server (B).

2 The SIP redirect server sends the invitation back to A with C’s IP address (or domain

name).

3 Client device A then sends the call invitation to client device C.

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