一个很不错的基于SIP的voip软件电话，基本可用的-A very good SIP-based voip software phones, the basic available

Linphone is an open source SIP Phone, available on mobile and desktop environments (iOS, Android, GNU/Linux, MAC OSX, Windows Desktop, Windows 10 UWP). Linphone has inside a separation between the user interfaces and the core engine, allowing to c