Fred Posner

Kamailio Consultant, VoIP Engineer, SIP Expert, and Baker

Yes, baker.

Fred's primary role is a VoIP Consultant, specializing in Open Source software including Asterisk, Kamailio (formerly OpenSER), and FreeSWITCH.

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Fred Posner, SIP Expert

Kamailio / SIP Expert

For more than 15 years, Fred Posner has provided VoIP consulting services; specializing in open source communication products such as Kamailio, Asterisk, and FreeSWITCH. Clients utilize Fred's services for design, implementation, and support (including emergency support).

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Have SIP / Will Travel

Fred enjoys evangelizing open source telecom and has spoken at Kamailio World, Astricon, ITEXPO, Cluecon, Asterisk World, and more.

Fred loves the open source VoIP community and was honored to receive a 2019 SimCon Award recognizing his support and contributions.

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Fred Winning the Pre-Posthumous award from Simwood

SIP Expert / Voice Engineer

Open Source VoIP Consultant

Kamailio Support

Kamailio expert, speaker, and consultant. Proudly working with Kamailio/OpenSER since 2005.

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Asterisk Support

Asterisk expert, speaker, and consultant. Proudly working with Asterisk since 2003.

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FreeSWITCH Support

FreeSWITCH expert, speaker, and consultant. Proudly working with FreeSWITCH since 2008.

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"Fred utterly embodies the definition of 'reliability' and 'quality'."

"Fred should be your go to guy."

"A tireless and enthusiastic advocate on behalf of the Kamailio project and, more broadly, in the service of the open-source VoIP ecosystem."

"Fred has a very strong work ethic and is a great problem solver."

"Fred's problem solving skills have a razor precision that borders on freakish."