IP电话/视频会议

开发平台：

Java

ACK.txt：源码内容

							ACK sip:user@192.168.123.224:5031 SIP/2.0
Via: SIP/2.0/UDP 192.168.123.22;branch=z9hG4bK800b2894b691dc1196d0000c2900a6e5
From: 3CX Phone <sip:user1@192.168.123.22>;tag=21388
To: <sip:user@192.168.123.224:5031>;tag=800fbdfde091dc11b486005056c00008
Call-ID: 80B1C591-B691-DC11-96CF-000C2900A6E5@192.168.123.22
CSeq: 5 ACK
Contact: <sip:user1@192.168.123.22>
Max-Forwards: 70
Content-Length: 0

						