Introduction

Minisip is a SIP User Agent ("Internet telephone").
It can be used to make phone calls, instant message and videocalls to your buddies connected to the same SIP network.

Features:

SIP compliant (RFC 3261 and more)

Multiple lines (users) on the same phone

Multiple incoming/outgoing calls simultaneously

Runs on multiple Operating Systems (Linux PC, Linux familiar IPAQ PDA, Windows XP and soon Windows Mobile 2003 SE)

Focus on security: TLS, end-to-end security, SRTP, MIKEY (DH, PSK, PKE)

Instant Messaging

Video conferencing

Spatial audio

Push-to-Talk (P2T)

Full Mesh audio conferencing

STUN support

Call Logging

The source code is available as a number of libraries under the GNU Lesser General Public License (LGPL) and applications under the GNU General Public Licence (GPL).

Keywords:
Secure VoIP; SIP; MIKEY; RTP; SRTP; SDP; Video Telephony; Push-to-talk (p2t); Multi-platform; gtkmm; full-mesh.

I Want One!
You can download it for free from the download page.

The People
Minisip is developed by:

Ph.D and Master students at the Royal Institute of Technology (KTH, Stockholm, Sweden)

Non-KTH volunteer developers

2006-06-15 Erik Eliasson defended his Licentiate thesis called Secure Internet Telephony: Design, Implementation, and Performance Measurement. Congratulations! The thesis can be found on from the publications section. 2006-03-01 MiniSIP ported to Windows Mobile 2003 SE!! Thanks to Cesc Santasusana and Microsoft Embedded VC++ 4.0! Now we just need a GUI for it ;) 2006-01-01 MiniSIP ported to Windows XP!! Thanks to Mikael Magnusson and mingw32-cross-compiler :) 2005-12-01 MiniSIP v0.8 released! From the repository: branches/stable 2005-06-09 Jon-Olov Vatn defended his Ph.D. thesis called IP telephony: mobility and security. Congratulations! The thesis can be found on from the publications section. 2005-06-02 A paper on how to implement secure VoIP and measurements of the performance was presented on the 2nd Workshop on Securing Voice over IP. The paper is available in the publications section. 2005-05-31 Support for conference calls has been implemented and evaluated by Bilge Cetin, Guang Liang, Max Loubser, Elena Martin and Hanning Zhang. More information is available here. 2005-05-31 Minisip supports iLBC and Speex thanks to a project by Azadeh Bararsani, Peter Nyberg and Adie Tong. More information is available here. 2005-02-21 Version 0.7 of minisip released! 2004-10-15 Version 0.6 of minisip released! 2004-09-26 New minisip.org web page design by Therese Wallström - Thanks! 2004-09-06 SIP based VoIP+video call demonstrated at the 30th European Conference and Exhibition on Optical Communication, Stockholm, Sweden.