I 333344445 SIP-C/4.0
F: sip:111122223@fetion.com.cn;p=16107
I: -7
K: text/plain
K: text/html-fragment
K: multiparty
K: nudge
XI: 9b844623eb494bc99128fa7676ac447b
L: 111
Q: 200002 I
AL: buddy
A: CS address="58.68.229.49:8080;58.68.229.49:443;221.176.31.10:8080;221.176.31.10:443",credential="1798470167.1339065106"

s=session
m=message 
a=user:sip:111122223@fetion.com.cn;p=16107
a=user:sip:333344445@fetion.com.cn;p=16106

SIP-C/4.0 200 OK
I: -7 
Q: 200002 I
F: sip:111122223@fetion.com.cn;p=16107