<s>
SightSpeed	B-Protocol
is	O
a	O
videoconferencing	B-Application
company	O
,	O
supplying	O
VoIP	B-Application
and	O
instant	B-Application
messaging	I-Application
app	O
for	O
Windows	O
and	O
macOS	B-Application
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
The	O
service	O
allows	O
people	O
to	O
make	O
video	B-Application
calls	I-Application
,	O
computer-to-computer	O
voice	O
calls	O
,	O
and	O
calls	O
to	O
regular	O
telephones	O
,	O
with	O
free	O
and	O
paid	O
versions	O
.	O
</s>
<s>
The	O
Logitech	B-Protocol
Vid	I-Protocol
service	O
is	O
based	O
on	O
SightSpeed	B-Protocol
's	O
technology	O
.	O
</s>
<s>
Due	O
to	O
competing	O
software	O
,	O
the	O
Logitech	B-Protocol
Vid	I-Protocol
video	B-Application
calling	I-Application
service	O
will	O
be	O
discontinued	O
as	O
of	O
1	O
July	O
2013	O
and	O
the	O
downloading	O
of	O
the	O
product	O
has	O
already	O
been	O
terminated	O
.	O
</s>
<s>
SightSpeed	B-Protocol
"	O
Phone	O
Out	O
"	O
does	O
not	O
support	O
outbound	O
caller	O
ID	O
in	O
the	O
United	O
States	O
,	O
where	O
people	O
commonly	O
reject	O
calls	O
from	O
unrecognized	O
numbers	O
.	O
</s>
<s>
Though	O
it	O
uses	O
the	O
SIP	O
standard	O
it	O
is	O
not	O
interoperable	O
with	O
SIP	O
networks	O
and	O
can	O
only	O
be	O
used	O
with	O
a	O
SightSpeed	B-Protocol
account	O
.	O
</s>
