ack

SIP 1.5.0源代码

ACK sip:5105@192.168.36.180:5060;user=phone SIP/2.0
Via: SIP/2.0/UDP 192.168.36.180:5060;branch=4
Via: SIP/2.0/UDP 192.168.36.200:5070;branch=102
Via: SIP/2.0/UDP 192.168.36.180:5060;branch=2
Via: SIP/2.0/UDP 192.168.6.20:5060
From: <sip:5120@192.168.6.20:5060>
To: <sip:5105@192.168.6.5:5060>;tag=c2943000cda620-0
Call-ID: c2943000-19e062-434332-2e323931@192.168.6.20
CSeq: 100 ACK
Content-Length: 0