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- Asterisk is distributed under the GNU General Public License version 2
- and is also available under alternative licenses negotiated directly
- with Digium, Inc. If you obtained Asterisk under the GPL, then the GPL
- applies to all loadable Asterisk modules used on your system as well,
- except as defined below. The GPL (version 2) is included in this
- source tree in the file COPYING.
- This package also includes various components that are not part of
- Asterisk itself; these components are in the 'contrib' directory
- and its subdirectories. These components are also distributed under the
- GPL version 2 as well.
- Digium, Inc. (formerly Linux Support Services) holds copyright
- and/or sufficient licenses to all components of the Asterisk
- package, and therefore can grant, at its sole discretion, the ability
- for companies, individuals, or organizations to create proprietary or
- Open Source (even if not GPL) modules which may be dynamically linked at
- runtime with the portions of Asterisk which fall under our
- copyright/license umbrella, or are distributed under more flexible
- licenses than GPL.
- If you wish to use our code in other GPL programs, don't worry --
- there is no requirement that you provide the same exception in your
- GPL'd products (although if you've written a module for Asterisk we
- would strongly encourage you to make the same exception that we do).
- Specific permission is also granted to link Asterisk with OpenSSL, OpenH323
- UniMRCP, and/or the UW IMAP Toolkit and distribute the resulting binary files.
- In addition, Asterisk implements several management/control protocols.
- This includes the Asterisk Manager Interface (AMI), the Asterisk Gateway
- Interface (AGI), and the Asterisk REST Interface (ARI). It is our belief
- that applications using these protocols to manage or control an Asterisk
- instance do not have to be licensed under the GPL or a compatible license,
- as we believe these protocols do not create a 'derivative work' as referred
- to in the GPL. However, should any court or other judiciary body find that
- these protocols do fall under the terms of the GPL, then we hereby grant you a
- license to use these protocols in combination with Asterisk in external
- applications licensed under any license you wish.
- The 'Asterisk' name and logos are trademarks owned by Digium, Inc.,
- and use of them is subject to our trademark licensing policies. If you
- wish to use these trademarks for purposes other than simple
- redistribution of Asterisk source code obtained from Digium, you
- should contact our licensing department to determine the necessary
- steps you must take. For more information on this policy, please read:
- http://www.digium.com/en/company/profile/trademarkpolicy.php
- If you have any questions regarding our licensing policy, please
- contact us:
- +1.877.344.4861 (via telephone in the USA)
- +1.256.428.6000 (via telephone outside the USA)
- +1.256.864.0464 (via FAX inside or outside the USA)
- IAX2/pbx.digium.com (via IAX2)
- licensing@digium.com (via email)
- Digium, Inc.
- 445 Jan Davis Drive
- Huntsville, AL 35806
- USA
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