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OpenSIPS (former OpenSER) is an GPL implementation of a multi-functionality SIP Server that targets to deliver a high-level technical solution (performance, security and quality) to be used in professional SIP server platforms.
IMPORTANT: this is no longer the main hosting for the project. This was moved on GITHUB - https://github.com/OpenSIPS/opensips
License
GNU General Public License version 2.0 (GPLv2)Other Useful Business Software
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User Reviews
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Thanks for so usefull software.
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Switching to OpenSIPS as a routing and load balancing platform has been one of the best decisions we have ever made. It is lightning fast, extremely flexible, ultra scalable, and has a very active development team. Thank you for your continued hard work OpenSIPS team!
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Fantastic, an amazing project.
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Great product - excellent performance and choice of modules that cover most requirements. I have written a detailed review here: http://kb.smartvox.co.uk/opensips/opensips-explained/
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Very powerful SIP Proxy, easy to install and configure, has a module for pretty much anything you can think of, works great with OSP!