SIP Inspector 是一个用来模拟不同的SIP消息和通讯情景的工具，可用来创建 SIP 信令、定制 SIP 消息以及兼容输入和输出的消息包，该工具还可以直接从 pcap 文件中播放 RTP 流。

Changes:

1. Scenario now supports multiple dialogs. 
2. A command was added for setting the remote target. 
3. IP address and port scanning functionality was added, which can be used to discover SIP capable devices. 
4. GUI components now use MiG layout. 
5. Bugs were fixed