<s>
FreePBX	B-Application
is	O
a	O
web-based	O
open-source	B-Application
graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
that	O
manages	O
Asterisk	B-Language
,	O
a	O
voice	B-Application
over	I-Application
IP	I-Application
and	O
telephony	O
server	O
.	O
</s>
<s>
FreePBX	B-Application
is	O
licensed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
version	O
3	O
.	O
</s>
<s>
It	O
is	O
a	O
component	O
of	O
the	O
FreePBX	B-Protocol
Distro	I-Protocol
,	O
which	O
is	O
an	O
independently	O
maintained	O
Linux	B-Application
system	O
derived	O
from	O
the	O
source	O
code	O
of	O
the	O
CentOS	O
distribution	O
,	O
having	O
Asterisk	B-Language
pre-installed	O
.	O
</s>
<s>
It	O
is	O
also	O
included	O
in	O
various	O
third-party	O
distributions	O
such	O
as	O
The	O
FreePBX	B-Protocol
Distro	I-Protocol
and	O
AsteriskNow	O
.	O
</s>
<s>
FreePBX	B-Application
was	O
acquired	O
by	O
Schmooze.com	O
in	O
early	O
2013	O
.	O
</s>
<s>
FreePBX	B-Application
is	O
a	O
community	O
of	O
developers	O
and	O
contributors	O
who	O
devote	O
their	O
work	O
to	O
making	O
complicated	O
phone	O
system	O
software	O
easy	O
to	O
use	O
and	O
functional	O
.	O
</s>
<s>
FreePBX	B-Application
can	O
be	O
installed	O
as	O
standalone	O
software	O
,	O
or	O
as	O
part	O
of	O
a	O
pre-configured	O
FreePBX	B-Protocol
Distro	I-Protocol
that	O
includes	O
the	O
operating	O
system	O
,	O
the	O
Asterisk	B-Language
PBX	I-Language
,	O
FreePBX	B-Application
,	O
and	O
assorted	O
dependencies	O
:	O
</s>
<s>
FreePBX	B-Application
is	O
written	O
in	O
PHP	O
and	O
JavaScript	O
.	O
</s>
<s>
The	O
first	O
FreePBX	B-Application
release	O
,	O
version	O
0.2	O
(	O
November	O
28	O
,	O
2004	O
)	O
,	O
was	O
named	O
the	O
Asterisk	B-Language
Management	O
Portal	O
(	O
AMP	O
)	O
.	O
</s>
<s>
The	O
project	O
was	O
renamed	O
to	O
FreePBX	B-Application
for	O
trademark	O
reasons	O
,	O
as	O
Asterisk	B-Language
is	O
a	O
registered	O
trademark	O
of	O
the	O
Digium	B-Protocol
corporation	O
(	O
which	O
is	O
now	O
also	O
a	O
subsidiary	O
of	O
Sangoma	O
Technologies	O
Corporation	O
)	O
.	O
</s>
<s>
New	O
releases	O
of	O
Asterisk	B-Language
have	O
been	O
accommodated	O
by	O
various	O
updates	O
to	O
FreePBX	B-Application
.	O
</s>
<s>
FreePBX	B-Application
13	O
-	O
Previous	O
Stable	O
-	O
adds	O
responsive	O
GUI	B-Application
,	O
support	O
for	O
Asterisk	B-Language
13	O
,	O
Call	O
Event	O
Logging	O
CEL	O
and	O
reporting	O
,	O
fwconsole	O
CLI	O
system	O
management	O
,	O
Enhanced	O
Bulk	O
User	O
Management	O
,	O
expanded	O
localization	O
support	O
for	O
audio	O
and	O
sound	O
files	O
,	O
and	O
a	O
new	O
global	O
search	O
option	O
.	O
</s>
<s>
FreePBX	B-Application
15	O
-	O
Stable	O
Adds	O
a	O
new	O
REST	O
and	O
GraphQL	O
API	O
.	O
</s>
<s>
FreePBX	B-Application
supports	O
numerous	O
hardware	O
manufacturers	O
,	O
including	O
Aastra	O
Technologies	O
,	O
Algo	O
,	O
AND	O
,	O
AudioCodes	O
,	O
Cisco	O
Systems	O
,	O
Cyberdata	O
,	O
Digium	B-Protocol
,	O
Grandstream	O
,	O
Mitel	O
,	O
Nortel	O
,	O
Panasonic	O
,	O
Polycom	O
,	O
Sangoma	O
,	O
Snom	O
,	O
Xorcom	O
,	O
and	O
Yealink	O
.	O
</s>
<s>
FreePBX	B-Application
developers	O
estimate	O
the	O
distro	O
has	O
been	O
deployed	O
in	O
millions	O
of	O
active	O
PBX	O
systems	O
in	O
over	O
220	O
countries	O
and	O
territories	O
.	O
</s>
