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Open source SIP stack bypasses phone company filters

What was most interesting to me, however, is that the stack also uses encryption to bypass phone company filters designed to stop VOIP traffic.
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Written by Dana Blankenhorn, Inactive on

Solegy has decided to take its SIP stack open source.

Earthlink is among the current customers. They use it to enable their VOIP service.

President Stu Sleppin said the stack was built to handle large traffic loads, and the idea here is to get service providers to buy other Solegy products.

"Our business model is built on the assumption there will be many applications for SIP beyond voice. We started this to help application developers develop applications. We have hooks in it to other parts of our platform – which does rating, charging, keeping track of presence – so builders could use that. We've abstracted the ability to do those things to a high level."

What was most interesting to me, however, is that the stack also uses encryption to bypass phone company filters designed to stop VOIP traffic. "Network operators are trying to curtain VOIP, and this is not necessarily available in other stacks."

As an open source product the OpenSIPStack, offered under the Mozilla Public License, will compete most closely with sipX, reSIPprocate, and repro, all of which are available at SIPFoundry.  Hopefully links to the new program will be available there soon.

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