SFLPhone, a Linux VoIP client with encryption

SFLPhone Linux VoIP softphone review

The SFLPhone is a standards-compliant enterprise softphone for desktop and embedded systems, it has been designed for a help desks to handle hundreds of calls a day, it is also a perfectly suitable Linux VoIP client for the home user, it’s account setup wizard makes it very easy to open an account with the SFLPhone. The SFLPhone has Gnome, KDE and command line Python clients available for download, it is SIP and IAX2 compatible, it allows for multi audio conferencing, multiple SIP account support, call logging and search feature, the SFLPhone has been included in the official Ubuntu repositories.

To streamline calls you can assign shortcuts for pickUp, hangUp, togglePickupHangup, popupWindow, toggleHold these might not seem like star features to a home user but when used in a business environment managing dozens of calls a day being able to speed up calls pressing hotkeys will be invaluable and result in considerable time savings. Other useful features are the unlimited number of calls, call transfer and hold and call recording function. Support for Pulseaudio means that all other applications, e.g. musicplayer, will automatically mute when you receive a phone call.

SFLphone Linux VoIP encrypted calls

This Linux VoIP softphone address book integrates with Evolution’s Data Server for GNOME desktop users and KABC integration for the KDE client, a call feature I liked in the SFLPhone is that you can drag and drop two calls and choose in between transferring it or create a multi-conference call.

Linux VoIP encrypted calls

You can make secure SIP VoIP calls with zRTP and TLS encryption, voice encryption is done using SRTP, it uses the zRTP protocol to exchange encryption keys (Diffie-Hellman key exchange), the same protocol the Zfone uses and compatible with many other VoIP clients. Negotiation of the encryption keys for Secure Real-time Transport Protocol can be done with SDES too, using the TLS transport layer, SDES has been standardized by the Internet Engineering Task Force (IETF).

Visit SFLPhone VoIP homepage