<s>
QuteCom	B-Protocol
(	O
previously	O
called	O
WengoPhone	B-Protocol
)	O
was	O
a	O
free-software	B-Application
SIP-compliant	O
VoIP	B-Application
client	O
developed	O
by	O
the	O
QuteCom	B-Protocol
(	O
previously	O
OpenWengo	B-Protocol
)	O
community	O
under	O
the	O
GPL-2.0-or-later	B-License
license	O
.	O
</s>
<s>
It	O
allows	O
users	O
to	O
speak	O
to	O
other	O
users	O
of	O
SIP-compliant	O
VoIP	B-Application
software	O
at	O
no	O
cost	O
.	O
</s>
<s>
It	O
also	O
allows	O
users	O
to	O
call	O
landlines	B-Application
and	O
cell	O
phones	O
,	O
send	O
SMS	B-Device
and	O
make	O
video	B-Application
calls	I-Application
.	O
</s>
<s>
None	O
of	O
these	O
functions	O
are	O
tied	O
to	O
a	O
particular	O
provider	O
,	O
allowing	O
users	O
to	O
choose	O
among	O
any	O
SIP	B-Application
provider	O
.	O
</s>
<s>
Development	O
on	O
WengoPhone	B-Protocol
began	O
in	O
September	O
2004	O
.	O
</s>
<s>
A	O
next-generation	O
version	O
of	O
WengoPhone	B-Protocol
(	O
WengoPhone	B-Protocol
NG	O
)	O
began	O
development	O
in	O
2005	O
.	O
</s>
<s>
The	O
last	O
release	O
of	O
WengoPhone	B-Protocol
before	O
the	O
change	O
to	O
QuteCom	B-Protocol
was	O
version	O
2.1.2	O
.	O
</s>
<s>
A	O
WengoPhone	B-Protocol
Firefox	O
plug-in	O
has	O
also	O
been	O
published	O
,	O
which	O
is	O
currently	O
available	O
on	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
and	O
Microsoft	B-Application
Windows	I-Application
,	O
with	O
a	O
Linux	B-Application
version	O
under	O
development	O
.	O
</s>
<s>
On	O
28	O
January	O
2008	O
,	O
Wengo	B-Protocol
,	O
the	O
original	O
sponsor	O
of	O
WengoPhone	B-Protocol
,	O
transferred	O
the	O
sponsorship	O
of	O
the	O
project	O
to	O
MBDSYS	O
,	O
and	O
it	O
became	O
known	O
as	O
QuteCom	B-Protocol
.	O
</s>
<s>
On	O
15	O
May	O
2008	O
,	O
osAlliance	O
presented	O
kvats	O
as	O
a	O
branded	O
2.2	O
version	O
of	O
WengoPhone/QuteCom	O
with	O
the	O
preferred	O
SIP	B-Application
provider	O
A1	O
,	O
a	O
brand	O
of	O
mobilkom	O
Austria	O
.	O
</s>
<s>
As	O
of	O
29	O
July	O
2016	O
the	O
domain	O
qutecom.com	O
is	O
registered	O
with	O
a	O
domain	O
broker	O
.	O
</s>
<s>
PC-to-PC	O
calls	O
have	O
Hi-Fi	O
quality	O
and	O
use	O
several	O
codecs	B-General_Concept
such	O
as	O
iLBC	B-Algorithm
,	O
G.711	B-Algorithm
(	O
PCMA	B-Algorithm
or	O
PCMU	B-Algorithm
)	O
,	O
G.722	B-Algorithm
,	O
AMR	B-Algorithm
(	O
license	O
needed	O
)	O
,	O
AMR-WB	B-Algorithm
(	O
license	O
needed	O
)	O
,	O
G.729	B-Algorithm
(	O
license	O
needed	O
)	O
.	O
</s>
<s>
It	O
is	O
possible	O
to	O
start	O
a	O
conversation	O
with	O
other	O
users	O
of	O
the	O
same	O
software	O
or	O
any	O
other	O
software	O
that	O
is	O
SIP-compliant	O
such	O
as	O
Gizmo	B-Application
.	O
</s>
<s>
QuteCom	B-Protocol
also	O
allows	O
users	O
to	O
make	O
video	B-Application
calls	I-Application
using	O
FFmpeg	B-Library
.	O
</s>
<s>
Supported	O
video	O
codec	B-General_Concept
is	O
H.263	B-Algorithm
.	O
</s>
<s>
Since	O
version	O
2.1	O
,	O
QuteCom	B-Protocol
allows	O
IM	O
chats	O
with	O
MSN	B-Protocol
,	O
YIM	B-Application
,	O
AIM	B-Protocol
,	O
ICQ	B-Protocol
and	O
XMPP	B-Protocol
users	O
.	O
</s>
<s>
This	O
has	O
been	O
achieved	O
by	O
using	O
the	O
libpurple	B-Protocol
library	O
.	O
</s>
<s>
Concerning	O
calls	O
to	O
landlines	B-Application
,	O
the	O
default	O
server	O
configuration	O
is	O
the	O
one	O
from	O
Wengo	B-Protocol
,	O
which	O
was	O
the	O
primary	O
sponsor	O
of	O
the	O
OpenWengo	B-Protocol
project	O
.	O
</s>
<s>
After	O
the	O
release	O
of	O
version	O
2.1	O
,	O
QuteCom	B-Protocol
could	O
be	O
used	O
with	O
any	O
SIP	B-Application
provider	O
.	O
</s>
<s>
This	O
gives	O
users	O
an	O
economic	O
advantage	O
,	O
as	O
they	O
can	O
choose	O
the	O
SIP	B-Application
provider	O
according	O
to	O
how	O
much	O
the	O
provider	O
charges	O
per	O
minute	O
and	O
not	O
according	O
to	O
the	O
software	O
they	O
use	O
.	O
</s>
<s>
The	O
GUI	B-Application
is	O
similar	O
to	O
those	O
of	O
other	O
VoIP	B-Application
softphones	B-Protocol
such	O
as	O
Gizmo5	B-Application
or	O
Skype	B-Application
.	O
</s>
<s>
From	O
the	O
main	O
GUI	B-Application
,	O
tabs	O
allow	O
access	O
to	O
the	O
contact	O
list	O
,	O
recent	O
calls	O
list	O
,	O
and	O
user	O
account	O
information	O
.	O
</s>
<s>
Technically	O
,	O
it	O
is	O
written	O
in	O
Python	B-Language
and	O
Qt/C	O
++	O
programming	O
languages	O
.	O
</s>
<s>
The	O
features	O
of	O
QuteCom	B-Protocol
are	O
:	O
</s>
<s>
The	O
main	O
limitations	O
of	O
the	O
QuteCom	B-Protocol
are	O
:	O
</s>
