CHAPTER 28. SIP Gateway Management
344
© SAMSUNG Electronics Co., Ltd.
Figure 28.6 SIP Request Through a Redirect Server
SIP Call Flows
This section describes the basic SIP call flow in an SIP gateway.
SIP Gateway to SIP Gateway-Call Setup and Disconnect
Figure 28.7 shows a successful gateway-to-gateway call setup and disconnect.
The two end users are User A and User B. User A is located at PBX A, which
is connected to SIP gateway 1 via a T1/E1. User B is located at PBX B, which
is connected to SIP gateway 2 via a T1/E1. Table 28.1 briefly describes the
messages used in the call flow.
Client
Server
Client
Server
User agents
User agents
Proxy
Redirect
IP-based
network
Invite
302 Moved ternporarity
Ack
Содержание Ubigate iBG3026
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