resp1.sip

一个SIP协议栈

SIP/2.0 100 Trying
Via: SIP/2.0/UDP kton.bell-tel.com
From: A. Bell <sip:[e-mail]>
To: T. Watson <sip:[e-mail]> ;tag=37462311
Call-ID: [e-mail]
CSeq: 1 INVITE
Content-Length: 0

SIP/2.0 180 Ringing
Via: SIP/2.0/UDP kton.bell-tel.com
From: A. Bell <sip:[e-mail]>
To: T. Watson <sip:[e-mail]> ;tag=37462311
Call-ID: [e-mail]
CSeq: 1 INVITE
Content-Length: 0

SIP/2.0 182 Queued, 2 callers ahead
Via: SIP/2.0/UDP kton.bell-tel.com
From: A. Bell <sip:[e-mail]>
To: T. Watson <sip:[e-mail]> ;tag=37462311
Call-ID: [e-mail]
CSeq: 1 INVITE
Content-Length: 0

SIP/2.0 182 Queued, 1 caller ahead
Via: SIP/2.0/UDP kton.bell-tel.com
From: A. Bell <sip:[e-mail]>
To: T. Watson <sip:[e-mail]> ;tag=37462311
Call-ID: [e-mail]
CSeq: 1 INVITE
Content-Length: 0

SIP/2.0 200 OK
Via: SIP/2.0/UDP kton.bell-tel.com
From: A. Bell <sip:[e-mail]>
To: <sip:[e-mail]> ;tag=37462311
Call-ID: [e-mail]
CSeq: 1 INVITE
Contact: sip:[e-mail]
Content-Type: application/sdp
Content-Length: 121

v=0
o=watson 4858949 4858949 IN IP4 192.1.2.3
s=I'm on my way
c=IN IP4 boston.bell-tel.com
m=audio 5004 RTP/AVP 0 3