PBXtra and GPL

I can't find it at the moment, but they do make their source code available under the GPL. Digium won't include it in Asterisk proper because Fonality won't sign over the code to Digium's commercial license, which is understandable, and is the reason the CallWeaver fork of Asterisk exists: it's all GPL and has no dual-license stuff to deal with.

I am not sure this is on topic here as PBXTRA and trixbox are both property of Fonality they are not related. PBXtra if I am not mistaken uses Asterisk Business edition which is not Free..

http://www.gnu.org/licenses/gpl-faq.html#GPLRequireSourcePostedPu...

The GPL does not require you to release your modified version, or any part of it. You are free to make modifications and use them privately, without ever releasing them. This applies to organizations (including companies), too; an organization can make a modified version and use it internally without ever releasing it outside the organization.

But if you release the modified version to the public in some way, the GPL requires you to make the modified source code available to the program's users, under the GPL.

Thus, the GPL gives permission to release the modified program in certain ways, and not in other ways; but the decision of whether to release it is up to you.

Other FAQ's on the page above......

Remember, this only applies to modifications to code that was originally GPL. The PBXtra INTERFACE is totally isolated from the Asterisk code, they don't even run on the machine and that code is not GPL code.