CHAPTER 3. SIP Gateway Management
350
© SAMSUNG Electronics Co., Ltd.
Table 28.2 Call via Redirect Server (Continued)
No.
Message
Description
14
200 OK
SIP Gateway 2 sends 200 OK to SIP Gateway 1. 200
OK indicates that a session was formed normally
between SIP Gateway2 and SIP Gateway1. 200 OK
includes the media capability of SIP Gateway2.
15
Connect
Upon receiving 200 Ok, SIP Gateway 1 sends
Connect to PBX A.
16
Connect ACK
SIP Gateway 1 receives Connect ACK from PBX A.
17
ACK
SIP Gateway 2 sends ACK request to SIP Gateway2.
ACK request indicates that SIP Gateway 1 received
200 OK response normally.
18
Connect ACK
SIP Gateway 2 sends Connect ACK from PBX B.
19
Disconnect
If a subscriber hangs up the phone, SIP Gateway 2
receives Disconnect from PBX B.
20
BYE
SIP Gateway 2 sends BYE request to SIP Gateway1.
BYE request indicates the end of a session.
21
Disconnect
Upon receiving BYE, SIP Gateway2 sends
Disconnect to PBX A.
22
Release
Sends a Release in regard to Disconnect.
23
Release
Receives a Release in regard to Disconnect.
24
200 OK
SIP Gateway 1 sends 200 OK to SIP Gateway 2. 200
OK indicates that a session was terminated normally
by BYE request.
25
Release Complete
Receives Release Complete in regard to Release.
26
Release Complete
Sends Release Complete in regard to Release.
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