4.
Technical Data
4.3. SIP Busy message while outgoing call in case receiver is on another call
Busy message sent by SIP Trunk 2 when receiver is currently on another call,
SIP Trunk 2
xxx.xxx.xxx.xxx
your IP-PBX
000.000.000.000
CallerID
IP address of SIP Trunk 2
server
INVITE
From: "
aiueo PBX
" <sip:
0312123434
@
000.000.000.000
>;tag=as48ac6d56
To: <sip:
080AAAAXXXX
@
xxx.xxx.xxx.xxx
>
1
2
To: <sip:
080AAAAXXXX
@
xxx.xxx.xxx.xxx
>
Call-ID: 1443bb69616709ff719769cc61d28ce0@
xxx.xxx.xxx.xxx
407 Proxy Authentication Required
From: "
aiueo PBX
" <sip:
0312123434
@
000.000.000.000
>;tag=as48ac6d56
To: <sip:
080AAAAXXXX
@
xxx.xxx.xxx.xxx
>;tag=as291aca90
Call-ID: 1443bb69616709ff719769cc61d28ce0@
xxx.xxx.xxx.xxx
3
ACK
From: "
aiueo PBX
" <sip:
0312123434
@
000.000.000.000
>;tag=as48ac6d56
To: <sip:
080AAAAXXXX
@
xxx.xxx.xxx.xxx
>;tag=as291aca90
Call-ID: 1443bb69616709ff719769cc61d28ce0@
xxx.xxx.xxx.xxx
INVITE(with authentication information)
From: "
aiueo PBX
" <sip:
0312123434
@
000.000.000.000
>;tag=as48ac6d56
4
5
From: "
aiueo PBX
" <sip:
0312123434
@
000.000.000.000
>;tag=as48ac6d56
To: <sip:
080AAAAXXXX
@
xxx.xxx.xxx.xxx
>
Call-ID: 1443bb69616709ff719769cc61d28ce0@
xxx.xxx.xxx.xxx
100 Trying
From: "
aiueo PBX
" <sip:
0312123434
@
000.000.000.000
>;tag=as48ac6d56
To: <sip:
080AAAAXXXX
@
xxx.xxx.xxx.xxx
>
Call-ID: 1443bb69616709ff719769cc61d28ce0@
xxx.xxx.xxx.xxx
5
6
SIP/2.0 486 Busy Here
From: "
aiueo PBX
" <sip:
0312123434
@
000.000.000.000
>;tag=as48ac6d56
To: <sip:
080AAAAXXXX
@
xxx.xxx.xxx.xxx
>;tag=as715c3c5e
Call-ID: 1443bb69616709ff719769cc61d28ce0@
xxx.xxx.xxx.xxx
ACK
From: "
aiueo PBX
" <sip:
3120123434
@
000.000.000.000
>;tag=as48ac6d56
figure 4.3 SIP flow including Busy message while outgoing call
7
To: <sip:
080AAAAXXXX
@
xxx.xxx.xxx.xxx
>;tag=as715c3c5e
Call-ID: 1443bb69616709ff719769cc61d28ce0@
xxx.xxx.xxx.xxx
36
figure 4.3 SIP flow including Busy message while outgoing call