Callback Licence

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Callback is released under the GPL version 2:

GNU Public Licence version 2

You may freely redistribute and/or modify the code provided that you adhere to the licence terms.

Callback was originally derived from the FreePBX callback script. The modifications which I have made to the code are copyrighted © 2009-2021 by John Fawcett. No use may be made of the code except that specified under the GPL, unless previously agreed with the copyright owners.