4.
Technical Data
4.4. SIP INVITE message of incoming call from SIP Trunk 2 to your IP-PBX
SIP To header will be :
To: <sip:
Recipient Phone Number
@
Your IP PBX IP address
>
*SIP Trunk 2 sets the same recipient phone number to Alert-info header as well.
*SIP Trunk 2 sets the same recipient phone number to Alert-info header as well.
SIP Trunk 2
xxx.xxx.xxx.xxx
your IP-PBX
000.000.000.000
IP address of
your IP-PBX
CallerID
INVITE
From: "
080AAAAXXXX
" <sip:080AAAAXXXX@
xxx.xxx.xxx.xxx
>;tag=as1dddca7a
To: <sip:
0312345678
@
000.000.000.000
>
Recipient
your IP-PBX
1
2
To: <sip:
0312345678
@
000.000.000.000
>
Call-ID: 490e49cf2141339f0007e5ce47d80dd1@
xxx.xxx.xxx.xxx
100 Trying
From: "
080AAAAXXXX
" <sip:080AAAAXXXX@
xxx.xxx.xxx.xxx
>;tag=as1dddca7a
To: <sip:
0312345678
@
000.000.000.000
>
Call-ID: 490e49cf2141339f0007e5ce47d80dd1@
xxx.xxx.xxx.xxx
IP address of SIP
Trunk 2 server
3
200 OK
From: "
080AAAAXXXX
" <sip:080AAAAXXXX@
xxx.xxx.xxx.xxx
>;tag=as1dddca7a
To: <sip:
0312345678
@
000.000.000.000
>;tag=as577af7ce
Call-ID: 490e49cf2141339f0007e5ce47d80dd1@
xxx.xxx.xxx.xxx
ACK
From: "
080AAAAXXXX
" <sip:080AAAAXXXX@
xxx.xxx.xxx.xxx
>;tag=as1dddca7a
To: <sip:
0312345678
@
000.000.000.000
>;tag=as577af7ce
Starting a call
4
5
To: <sip:
0312345678
@
000.000.000.000
>;tag=as577af7ce
Call-ID: 490e49cf2141339f0007e5ce47d80dd1@
xxx.xxx.xxx.xxx
BYE
From: <sip:
0312345678
@
000.000.000.000
>;tag=as577af7ce
To: “
080AAAAXXXX
" <sip:080AAAAXXXX@
xxx.xxx.xxx.xxx
>;tag=as1dddca7a
Call-ID: 490e49cf2141339f0007e5ce47d80dd1@
xxx.xxx.xxx.xxx
Terminating a call
5
6
200 OK
From: <sip:
0312345678
@
000.000.000.000
>;tag=as577af7ce
To: "
080AAAAXXXX"
<sip:080AAAAXXXX@
xxx.xxx.xxx.xxx
>;tag=as1dddca7a
Call-ID: 490e49cf2141339f0007e5ce47d80dd1@
xxx.xxx.xxx.xxx
figure 4.4 SIP INVITE flow (incoming)
40
figure 4.4 SIP INVITE flow (incoming)