无应答前传
激活无应答呼叫前转业务后,当电话响铃无人接听,电话会自动转移到事前设定的号码上。
INVITEsip:[email protected]:5060;transport=udp SIP/2.0
Via: SIP/2.0/UDP192.168.11.137:5060;rport;branch=z9hG4bK1075141334
From: "1003"<sip:[email protected]:5060;user=phone>;tag=387369502
To:<sip:[email protected]:5060>
Call-ID: [email protected]
CSeq: 39 INVITE
Contact:<sip:[email protected]:5060>
Max-Forwards: 30
Allow: INVITE, ACK, BYE, CANCEL,OPTIONS, NOTIFY, REFER, REGISTER, MESSAGE, INFO, SUBSCRIBE
Content-Type: application/sdp
Content-Length: 284
v=0
o=ZED3 5525 5525 IN IP4192.168.11.137
s=ZED3
c=IN IP4 192.168.11.137
t=0 0
m=audio 6510 RTP/AVP 4 18 8 0 3 101
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:3 GSM/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
主叫方1003发起一路呼叫,终端1003向代理服务器发送INVITE请求消息
SIP/2.0 100 Trying
Via: SIP/2.0/UDP192.168.11.137:5060;rport;branch=z9hG4bK1075141334
From: "1003"<sip:[email protected]:5060;user=phone>;tag=387369502
To:<sip:[email protected]:5060>;tag=29a345f73
Call-ID: [email protected]
CSeq: 39 INVITE
Contact:<sip:[email protected].60:5060>
Content-Length: 0
代理服务器向终端用户1003回100 Trying响应,表示呼叫已经在处理中,终端收到100 Trying消息后,停止重发定时器
INVITE sip:[email protected]/2.0
Via: SIP/2.0/UDP192.168.11.60:5060;branch=z9hG4bK0ec3659b
Allow: INVITE, ACK, CANCEL, BYE,UPDATE, REFER, PRACK, REGISTER, INFO
From: ""<sip:[email protected]>;tag=2fdf9a65
Contact: <sip:[email protected]:5060>
To: <sip:[email protected]>
Call-ID: [email protected]
CSeq: 197 INVITE
Max-Forwards: 70
Alert-Info:<http://127.0.0.1/1>
Supported: timer
Session-Expires: 90
Record-ID: 1003_2013101018071508521178
Content-Type: application/sdp
Content-Length: 296
v=0
o=root 247686555 247686555 IN IP4192.168.11.60
s=session
c=IN IP4 192.168.11.60
t=0 0
m=audio 14668 RTP/AVP 4 18 8 0 3101
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:3 GSM/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
代理服务器对收到的请求消息验证通过,向被叫1004终端代理转发INVITE请求消息
SIP/2.0 100 Trying
Via: SIP/2.0/UDP192.168.11.60:5060;branch=z9hG4bK0ec3659b
From: ""<sip:[email protected]>;tag=2fdf9a65
To: <sip:[email protected]>;tag=1165739258
Call-ID: [email protected]
CSeq: 197 INVITE
Contact:<sip:[email protected]:5060>
Content-Length: 0
被叫1003回100 Trying响应,表示呼叫已经在处理中,代理服务器收到100 Trying消息后,停止重发定时器
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP192.168.11.60:5060;branch=z9hG4bK0ec3659b
From: "" <sip:[email protected]>;tag=2fdf9a65
To:<sip:[email protected]>;tag=1165739258
Call-ID: [email protected]
CSeq: 197 INVITE
Contact:<sip:[email protected]:5060>
Content-Length: 0
被叫终端用户1004振铃,终端向代理服务器回180 ring响应,表示被叫用户正在振铃
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP192.168.11.137:5060;rport;branch=z9hG4bK1075141334
From: "1003"<sip:[email protected]:5060;user=phone>;tag=387369502
To:<sip:[email protected]:5060>;tag=29a345f73
Call-ID: [email protected]
CSeq: 39 INVITE
Contact: <sip:[email protected]:5060>
Content-Length: 0
代理服务器向终端用户1003转发180ring响应,表示用户1003听回铃音
SIP/2.0 408 Request Timeout
Via: SIP/2.0/UDP192.168.11.60:5060;branch=z9hG4bK0ec3659b
From: ""<sip:[email protected]>;tag=2fdf9a65
To:<sip:[email protected]>;tag=1165739258
Call-ID: [email protected]
CSeq: 197 INVITE
Contact:<sip:[email protected]:5060>
Content-Length: 0
被叫1004长时间振铃,无人接听,被叫终端代理判断超时后,向代理服务器回408request timeout消息,放弃该次呼叫
ACK sip:[email protected] SIP/2.0
Via: SIP/2.0/UDP192.168.11.60:5060;branch=z9hG4bK0ec3659b
From: "" <sip:[email protected]>;tag=2fdf9a65
To:<sip:[email protected]>;tag=1165739258
Call-ID: [email protected]
CSeq: 197 ACK
Max-Forwards: 70
Content-Length: 0
代理服务器向终端用户1004回ACK,确认消息,终端用户1004挂机
INVITE sip:[email protected]/2.0
Via: SIP/2.0/UDP192.168.11.60:5060;branch=z9hG4bK7d051e83
Allow: INVITE, ACK, CANCEL, BYE,UPDATE, REFER, PRACK, REGISTER, INFO
From: ""<sip:[email protected]>;tag=20f9459e
Contact:<sip:[email protected]:5060>
To: <sip:[email protected]>
Call-ID: [email protected]
CSeq: 222 INVITE
Max-Forwards: 70
Alert-Info:<http://127.0.0.1/1>
Supported: timer
Session-Expires: 90
Record-ID:1003_2013101018071508521178
Diversion:<sip:[email protected]>;reason=no-answer
Content-Type: application/sdp
Content-Length: 298
v=0
o=root 2097487491 2097487491 IN IP4192.168.11.60
s=session
c=IN IP4 192.168.11.60
t=0 0
m=audio 13814 RTP/AVP 4 18 8 0 3101
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:3 GSM/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
代理服务器向终端用户1005发送INVITE请求消息
SIP/2.0 100 Trying
Via: SIP/2.0/UDP192.168.11.60:5060;branch=z9hG4bK7d051e83
From: ""<sip:[email protected]>;tag=20f9459e
To: <sip:[email protected]>;tag=1114398002
Call-ID: [email protected]
CSeq: 222 INVITE
Contact:<sip:[email protected]:5060>
Content-Length: 0
终端用户1005回100 Trying响应,表示呼叫已经在处理中
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP192.168.11.60:5060;branch=z9hG4bK7d051e83
From: "" <sip:[email protected]>;tag=20f9459e
To:<sip:[email protected]>;tag=1114398002
Call-ID: [email protected]
CSeq: 222 INVITE
Contact:<sip:[email protected]:5060>
Content-Length: 0
被叫终端用户1005振铃,终端代理向代理服务器回180 ring响应
SIP/2.0 200 OK
Via: SIP/2.0/UDP192.168.11.60:5060;branch=z9hG4bK7d051e83
From: ""<sip:[email protected]>;tag=20f9459e
To:<sip:[email protected]>;tag=1114398002
Call-ID: [email protected]
CSeq: 222 INVITE
Contact:<sip:[email protected]:5060>
Content-Type: application/sdp
Content-Length: 190
v=0
o=ZED3 5605 5605 IN IP4192.168.11.138
s=ZED3
c=IN IP4 192.168.11.138
t=0 0
m=audio 33440 RTP/AVP 18 101
a=rtpmap:18 G729/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
被叫用户1005摘机,终端1005向代理服务器回200OK响应消息,表示1005摘机。
ACK sip:[email protected]:5060SIP/2.0
Via: SIP/2.0/UDP192.168.11.60:5060;branch=z9hG4bK7d051e83
From: ""<sip:[email protected]>;tag=20f9459e
To:<sip:[email protected]>;tag=1114398002
Call-ID: [email protected]
CSeq: 222 ACK
Max-Forwards: 70
Content-Length: 0
终端服务将ACK确认消息转发给代理终端1005
SIP/2.0 200 OK
Via: SIP/2.0/UDP192.168.11.137:5060;rport;branch=z9hG4bK1075141334
From: "1003"<sip:[email protected]:5060;user=phone>;tag=387369502
To:<sip:[email protected]0:5060>;tag=29a345f73
Call-ID: [email protected]
CSeq: 39 INVITE
Contact:<sip:[email protected]:5060>
Record-ID:1003_2013101018071508521178
Content-Type: application/sdp
Content-Length: 201
v=0
o=root 964956008 964956008 IN IP4192.168.11.60
s=session
c=IN IP4 192.168.11.60
t=0 0
m=audio 14940 RTP/AVP 18 101
a=rtpmap:18 G729/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
代理服务器向终端1003转发该成功消息200OK
ACK sip:[email protected]:5060SIP/2.0
Via: SIP/2.0/UDP192.168.11.137:5060;rport;branch=z9hG4bK2053676586
From: "1003"<sip:[email protected]:5060;user=phone>;tag=387369502
To:<sip:[email protected]:5060>;tag=29a345f73
Call-ID: [email protected]
CSeq: 39 ACK
Contact:<sip:[email protected]:5060>
Max-Forwards: 30
Content-Length: 0
终端1003收到200OK消息后,向代理服务器发送ACK消息进行确认
呼叫建立,A和C开始通话。。。。。。
BYE sip:[email protected]:5060SIP/2.0
Via: SIP/2.0/UDP192.168.11.138:5060;branch=z9hG4bK1933227437
From:<sip:[email protected]>;tag=1114398002
To: ""<sip:[email protected]>;tag=20f9459e
Call-ID: [email protected]
CSeq: 223 BYE
Contact:<sip:[email protected]:5060>
Max-Forwards: 30
Content-Length: 0
通话结束,终端1005挂机,并向代理服务器发送BYE消息
SIP/2.0 200 OK
Via: SIP/2.0/UDP192.168.11.138:5060;branch=z9hG4bK1933227437
From: <sip:[email protected]>;tag=1114398002
To: ""<sip:[email protected]>;tag=20f9459e
Call-ID: [email protected]
CSeq: 223 BYE
Contact:<sip:[email protected]:5060>
Content-Length: 0
代理服务器收到BTE消息向终端1005发送200OK响应消息
BYE sip:[email protected]:5060SIP/2.0
Via: SIP/2.0/UDP192.168.11.60:5060;branch=z9hG4bK39840f68
From:<sip:[email protected]:5060>;tag=29a345f73
To: "1003"<sip:[email protected]:5060;user=phone>;tag=387369502
Call-ID: [email protected]
CSeq: 196 BYE
Max-Forwards: 70
Content-Length: 0
代理服务器转发BYE消息到终端1003
SIP/2.0 200 OK
Via: SIP/2.0/UDP192.168.11.60:5060;branch=z9hG4bK39840f68
From:<sip:[email protected]:5060>;tag=29a345f73
To: "1003"<sip:[email protected]:5060;user=phone>;tag=387369502
Call-ID: [email protected]
CSeq: 196 BYE
Content-Length: 0
代理终端1003收到BYE消息后,向代理服务器发送200OK消息
无应答前传业务消息流程图
以上消息流程的简要描述
1) 主叫1003发起一路呼叫,终端1003向代理服务器发送INVITE请求消息。
2) 代理服务器向终端用户1003回100 Trying响应,表示呼叫已经在处理中。
3) 代理服务器向被叫用户1004终端代理转发INVITE请求消息。
4) 终端代理用户1004向代理服务器回100 Trying响应,告知代理服务器呼叫正在处理
5) 被叫终端用户1004振铃,终端代理向代理服务器回180 ring响应。
6) 代理服务器向终端用户1003转发180ring响应。
7) 被叫长时间振铃,无人接听,被叫终端代理判断超时后,向代理服务器回408requesttimeout消息,放弃该次呼叫。
8) 代理服务器向终端用户1004回ACK,确认消息,终端用户1004挂机。
9) 代理服务器向终端用户1005发送INVITE请求消息。
10)代理终端用户1005回100 Trying响应,表示呼叫已经在处理中。
11)被叫终端代理用户1005振铃,终端代理向代理服务器回180 ring响应。
12)被叫用户1005摘机,终端1005向代理服务器回200OK响应消息,表示摘机。
13)代理服务器向终端代理1003转发该成功消息200OK。
14) 终端代理1003收到200OK消息后,向代理服务器发送ACK消息进行确认。
15)终端服务将ACK确认消息转发给代理终端1005。
16)代理终端1003和1005通话建立成功。
17) 通话结束,代理终端1005挂机,并向代理服务器发送BYE消息。
18)代理服务器转发BYE消息到终端1003。
19)代理终端1003收到BYE消息后,向代理服务器发送200OK消息。
20)代理服务器转发200OK响应消息至代理终端1005。
21)通话结束。
无应答前传消息流程