Table 28.1 Call Setup And Disconnect - Samsung Ubigate iBG3026 Configuration Manual

CHAPTER 28. SIP Gateway Management
No.
1 Setup
2 INVITE
3 Call Proceeding
4 Setup
5 100 Trying
6 Call Proceeding
7 Alerting
8 180 Ringing
9 Alerting
10 Connect
11 200 OK
12 Connect
13 Connect ACK
14 ACK
346

Table 28.1 Call Setup and Disconnect

Message
SIP Gateway 1 receives Setup from PBX A. Setup
indicates the call attempt from User A to User B.
SIP Gateway 1 sends INVITE request to SIP Gateway2.
INVITE request indicates the call attempt from User A to
User B. INVITE includes the media capability of SIP
Gateway1.
SIP Gateway 1 sends Call Proceeding to PBX A. Call
Proceeding indicates that SIP Gateway1 received Setup
and attempts SIP signaling call.
SIP Gateway 2, upon receiving INVITE, sends Setup to
PBX B.
SIP Gateway 2 sends a response to INVITE request to
SIP Gateway1. 100 Trying response indicates that SIP
Gateway 2 has received the INVITE request.
SIP Gateway 2 receives Call Proceeding from PBX B.
Call Proceeding indicates that PBX B, after receiving
Setup, proceeds with a call.
SIP Gateway 2 receives Alerting from PBX B. Alerting
indicates that User B is ringing.
SIP Gateway 2 sends 180 Ringing to SIP Gateway 1. 180
Ringing indicates that a callee is located at SIP Gateway
2, and the User B is currently alerted.
Upon receiving 180 Ringing, SIP Gateway 1 sends
Alerting to PBX A.
If a called subscriber replies, SIP Gateway 2 receives
Connect from PBX B. Connect indicates that a call was
received from User B.
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.
Upon receiving 200 OK, SIP Gateway1 sends Connect to
PBX A.
SIP Gateway 1 receives Connect ACK from PBX A. Connect
ACK indicates that Connect was received normally.
SIP Gateway 2 sends ACK request to SIP Gateway2.
ACK request indicates that SIP Gateway 1 received 200
OK response normally.
Description
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