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OpenSIPS logo
Developer(s) OpenSIPS Project
Initial release August 2008; 6 years ago (2008-08)
Stable release 1.11.1 /
May 7, 2014; 7 months ago (2014-05-07)[1]
Development status Active
Written in C
Operating system Linux, FreeBSD, Solaris
Type Voice over Internet Protocol
License GNU GPL

OpenSIPS is a free software implementation of the session initiation protocol (SIP) for voice over IP (VoIP) than can be used to handle voice, text and video communication. OpenSIPS is intended for installations serving thousands of calls and is IETF RFC3261 compliant.[2]


  1. ^ "OpenSIPS About Version 1.11.x". OpenSIPS. May 7, 2014. Retrieved 22 May 2014. 
  2. ^ Goncalves, Flavio E., Building Telephony Systems with OpenSIPS 1.6, Packt Publishing 

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