1 Asterisk is distributed under the GNU General Public License version 2
2 and is also available under alternative licenses negotiated directly
3 with Digium, Inc. If you obtained Asterisk under the GPL, then the GPL
4 applies to all loadable Asterisk modules used on your system as well,
5 except as defined below. The GPL (version 2) is included in this
6 source tree in the file COPYING.
8 This package also includes various components that are not part of
9 Asterisk itself; these components are in the 'contrib' directory
10 and its subdirectories. Most of these components are also
11 distributed under the GPL version 2 as well, except for the following:
13 contrib/firmware/iax/iaxy.bin:
14 This file is Copyright (C) Digium, Inc. and is licensed for
15 use with Digium IAXy hardware devices only. It can be
16 distributed freely as long as the distribution is in the
17 original form present in this package (not reformatted or
20 Digium, Inc. (formerly Linux Support Services) holds copyright
21 and/or sufficient licenses to all components of the Asterisk
22 package, and therefore can grant, at its sole discretion, the ability
23 for companies, individuals, or organizations to create proprietary or
24 Open Source (even if not GPL) modules which may be dynamically linked at
25 runtime with the portions of Asterisk which fall under our
26 copyright/license umbrella, or are distributed under more flexible
29 If you wish to use our code in other GPL programs, don't worry --
30 there is no requirement that you provide the same exception in your
31 GPL'd products (although if you've written a module for Asterisk we
32 would strongly encourage you to make the same exception that we do).
34 Specific permission is also granted to link Asterisk with OpenSSL and
35 OpenH323 and distribute the resulting binary files.
37 In addition, Asterisk implements two management/control protocols: the
38 Asterisk Manager Interface (AMI) and the Asterisk Gateway Interface
39 (AGI). It is our belief that applications using these protocols to
40 manage or control an Asterisk instance do not have to be licensed
41 under the GPL or a compatible license, as we believe these protocols
42 do not create a 'derivative work' as referred to in the GPL. However,
43 should any court or other judiciary body find that these protocols do
44 fall under the terms of the GPL, then we hereby grant you a license to
45 use these protocols in combination with Asterisk in external
46 applications licensed under any license you wish.
48 The 'Asterisk' name and logos are trademarks owned by Digium, Inc.,
49 and use of them is subject to our trademark licensing policies. If you
50 wish to use these trademarks for purposes other than simple
51 redistribution of Asterisk source code obtained from Digium, you
52 should contact our licensing department to determine the necessary
53 steps you must take. For more information on this policy, please read:
55 http://www.digium.com/en/company/profile/trademarkpolicy.php
57 If you have any questions regarding our licensing policy, please
60 +1.877.344.4861 (via telephone in the USA)
61 +1.256.428.6000 (via telephone outside the USA)
62 +1.256.864.0464 (via FAX inside or outside the USA)
63 IAX2/misery.digium.com/6000 (via IAX2)
64 licensing@digium.com (via email)