<s>
SipXecs	B-Protocol
is	O
a	O
free	B-Application
software	I-Application
enterprise	O
communications	O
system	O
.	O
</s>
<s>
It	O
was	O
initially	O
developed	O
by	O
Pingtel	O
Corporation	O
in	O
2003	O
as	O
a	O
voice	B-Application
over	I-Application
IP	I-Application
telephony	O
server	O
located	O
in	O
Boston	O
,	O
MA	O
.	O
</s>
<s>
Since	O
its	O
extension	O
,	O
sipXecs	B-Protocol
now	O
acts	O
as	O
a	O
software	O
implementation	O
of	O
the	O
Session	B-Application
Initiation	I-Application
Protocol	I-Application
(	O
SIP	B-Application
)	O
,	O
making	O
it	O
a	O
full	O
IP-based	O
communications	O
system	O
(	O
IP	O
PBX	O
)	O
.	O
</s>
<s>
SipXecs	B-Protocol
competitors	O
include	O
other	O
open-source	O
telephony	O
and	O
SoftSwitch	O
solutions	O
such	O
as	O
Asterisk	B-Language
,	O
FreeSWITCH	B-Language
,	O
and	O
the	O
SIP	B-Protocol
Express	I-Protocol
Router	I-Protocol
.	O
</s>
<s>
Development	O
of	O
sipXecs	B-Protocol
was	O
started	O
in	O
2003	O
by	O
Pingtel	O
Corp	O
,	O
a	O
Boston	O
,	O
MA	O
based	O
venture	O
backed	O
company	O
.	O
</s>
<s>
Subsequent	O
to	O
the	O
acquisition	O
by	O
Nortel	O
,	O
Nortel	O
released	O
the	O
SCS500	O
product	O
based	O
on	O
sipXecs	B-Protocol
.	O
</s>
<s>
The	O
sipXecs	B-Protocol
solution	O
continued	O
to	O
be	O
used	O
as	O
the	O
basis	O
for	O
the	O
cloud	O
based	O
communications	O
service	O
.	O
</s>
<s>
commercialized	O
the	O
sipXecs	B-Protocol
solution	O
in	O
close	O
cooperation	O
with	O
SIPfoundry	O
and	O
the	O
open-source	O
community	O
.	O
</s>
<s>
SipXecs	B-Protocol
is	O
typically	O
deployed	O
by	O
enterprises	O
wanting	O
to	O
replace	O
a	O
traditional	O
private	B-Device
branch	I-Device
exchange	I-Device
(	O
PBX	O
)	O
with	O
a	O
software-based	O
solution	O
that	O
can	O
be	O
produced	O
in	O
a	O
cloud	O
environment	O
.	O
</s>
<s>
In	O
addition	O
to	O
telephony	O
features	O
,	O
sipXecs	B-Protocol
offers	O
collaboration	O
capabilities	O
such	O
as	O
enterprise	O
instant	O
messaging	O
and	O
conferencing	O
.	O
</s>
<s>
SipXecs	B-Protocol
is	O
designed	O
as	O
a	O
software-only	O
,	O
distributed	O
cloud	B-Architecture
application	I-Architecture
.	O
</s>
<s>
A	O
minimum	O
configuration	O
allows	O
running	O
all	O
of	O
the	O
sipXecs	B-Protocol
components	O
on	O
a	O
single	O
server	O
,	O
including	O
database	O
,	O
all	O
available	O
services	O
,	O
and	O
the	O
sipXecs	B-Protocol
management	O
.	O
</s>
<s>
SipXecs	B-Protocol
uses	O
MongoDB	B-Application
as	O
a	O
distributed	O
and	O
partition	O
tolerant	O
database	O
for	O
global	O
transactions	O
,	O
includes	O
CFEngine	B-Protocol
for	O
orchestration	O
of	O
clusters	O
and	O
JasperReports	B-Language
for	O
reporting	O
.	O
</s>
<s>
The	O
management	O
and	O
configuration	O
system	O
is	O
based	O
on	O
the	B-Application
Spring	I-Application
Framework	I-Application
.	O
</s>
<s>
sipXecs	B-Protocol
includes	O
FreeSWITCH	B-Language
as	O
its	O
media	O
server	O
and	O
Openfire	B-Language
for	O
presence	O
and	O
instant	O
messaging	O
services	O
.	O
</s>
<s>
SipXecs	B-Protocol
follows	O
standards	O
such	O
as	O
Session	B-Application
Initiation	I-Application
Protocol	I-Application
(	O
SIP	B-Application
)	O
,	O
SRTP	B-Protocol
,	O
Extensible	B-Protocol
Messaging	I-Protocol
and	I-Protocol
Presence	I-Protocol
Protocol	I-Protocol
(	O
XMPP	B-Protocol
)	O
,	O
SIP	B-Protocol
and	I-Protocol
XMPP	I-Protocol
over	I-Protocol
TLS	I-Protocol
,	O
and	O
several	O
Web	O
standards	O
including	O
WebRTC	B-Protocol
,	O
WebSOCKET	B-Protocol
and	O
Representational	B-Protocol
State	I-Protocol
Transfer	I-Protocol
(	O
REST	O
)	O
.	O
</s>
<s>
,	O
Inc	O
.	O
holds	O
the	O
US	O
patent	O
on	O
the	O
architecture	O
referred	O
to	O
as	O
SIP	B-Application
Session	O
Oriented	O
Architecture	O
or	O
SSOA	O
.	O
</s>
<s>
SIPfoundry	O
claims	O
on	O
its	O
Web	O
site	O
that	O
over	O
one	O
million	O
users	O
have	O
downloaded	O
sipXecs	B-Protocol
in	O
small	O
and	O
large	O
companies	O
worldwide	O
.	O
</s>
<s>
Amazon.com	B-Application
was	O
an	O
early	O
adopter	O
of	O
sipXecs	B-Protocol
.	O
</s>
<s>
OnRelay	O
,	O
a	O
company	O
in	O
the	O
UK	O
,	O
selected	O
sipXecs	B-Protocol
for	O
its	O
fixed-mobile	O
convergence	O
solution	O
sold	O
to	O
carriers	O
.	O
</s>
<s>
Colorado	O
State	O
University	O
and	O
Cedarville	O
University	O
of	O
Ohio	O
committed	O
to	O
sipXecs	B-Protocol
in	O
2010	O
.	O
</s>
<s>
Red	O
Hat	O
deployed	O
a	O
commercial	O
version	O
of	O
sipXecs	B-Protocol
from	O
globally	O
in	O
2012	O
.	O
</s>
<s>
Under	O
the	O
SIPfoundry	O
Higher	O
Education	O
Program	O
(	O
HEP	O
)	O
and	O
as	O
of	O
2014	O
Lafayette	O
College	O
,	O
St.	O
Mary	O
's	O
University	O
,	O
Messiah	O
College	O
,	O
Colorado	O
School	O
of	O
Mines	O
,	O
Carthage	O
College	O
deployed	O
sipXecs	B-Protocol
to	O
replace	O
their	O
respective	O
PBX	O
systems	O
.	O
</s>
<s>
SipXecs	B-Protocol
is	O
used	O
by	O
small	O
and	O
large	O
enterprises	O
ranging	O
up	O
to	O
about	O
20,000	O
users	O
per	O
cluster	O
.	O
</s>
<s>
SipXecs	B-Protocol
is	O
available	O
for	O
Red	O
Hat	O
Linux	O
and	O
CentOS	O
.	O
</s>
<s>
It	O
runs	O
virtualized	O
in	O
different	O
cloud	O
environments	O
such	O
as	O
the	O
Amazon	B-General_Concept
Elastic	I-General_Concept
Compute	I-General_Concept
Cloud	I-General_Concept
,	O
the	O
Google	B-General_Concept
Compute	I-General_Concept
Engine	I-General_Concept
,	O
the	O
HP	B-General_Concept
Cloud	I-General_Concept
,	O
IBM	O
SoftLayer	B-General_Concept
,	O
VMware	O
vCloud	B-General_Concept
and	O
VMware	B-Operating_System
ESX	I-Operating_System
,	O
OpenStack	B-Application
environments	O
,	O
and	O
clouds	O
from	O
other	O
vendors	O
using	O
these	O
technologies	O
.	O
</s>
<s>
SIPfoundry	O
distributes	O
the	O
sipXecs	B-Protocol
source	O
code	O
under	O
the	O
AGPL-3.0-or-later	B-Application
license	O
.	O
</s>
<s>
Many	O
different	O
corporate	O
and	O
individual	O
contributors	O
contributed	O
to	O
sipXecs	B-Protocol
,	O
including	O
Pingtel	O
,	O
Bluesocket	O
,	O
Nortel	O
,	O
Avaya	O
,	O
and	O
as	O
some	O
of	O
the	O
larger	O
corporate	O
contributors	O
representing	O
864,791	O
lines	O
of	O
code	O
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
sipXecs	B-Protocol
solution	O
includes	O
many	O
other	O
open-source	O
components	O
.	O
</s>
<s>
Contributions	O
to	O
sipXecs	B-Protocol
are	O
made	O
under	O
a	O
Contributor	O
Agreement	O
,	O
which	O
grants	O
SIPfoundry	O
shared	O
Copyright	O
with	O
the	O
original	O
author	O
on	O
all	O
contributed	O
code	O
.	O
</s>
<s>
SipXecs	B-Protocol
supports	O
a	O
wide	O
range	O
of	O
SIP	B-Application
compatible	O
hardware	O
,	O
such	O
as	O
PSTN	O
gateways	O
,	O
desk	O
phones	O
,	O
softphones	B-Protocol
and	O
mobile	O
phone	O
applications	O
.	O
</s>
<s>
The	O
SipXecs	B-Protocol
system	O
represents	O
a	O
reference	O
implementation	O
of	O
the	O
SIP	B-Application
standard	O
.	O
</s>
<s>
It	O
was	O
used	O
at	O
SIPIT	O
interoperability	O
events	O
organized	O
by	O
the	O
SIP	B-Application
Forum	O
to	O
test	O
interoperability	O
of	O
SIP	B-Application
solutions	O
from	O
many	O
different	O
vendors	O
.	O
</s>
