<s>
Fixed	B-General_Concept
wireless	I-General_Concept
is	O
the	O
operation	O
of	O
wireless	O
communication	O
devices	O
or	O
systems	O
used	O
to	O
connect	O
two	O
fixed	O
locations	O
(	O
e.g.	O
,	O
building	O
to	O
building	O
or	O
tower	O
to	O
building	O
)	O
with	O
a	O
radio	O
or	O
other	O
wireless	O
link	O
,	O
such	O
as	O
laser	O
bridge	O
.	O
</s>
<s>
Usually	O
,	O
fixed	B-General_Concept
wireless	I-General_Concept
is	O
part	O
of	O
a	O
wireless	B-Architecture
LAN	I-Architecture
infrastructure	O
.	O
</s>
<s>
The	O
purpose	O
of	O
a	O
fixed	B-General_Concept
wireless	I-General_Concept
link	O
is	O
to	O
enable	O
data	O
communications	O
between	O
the	O
two	O
sites	O
or	O
buildings	O
.	O
</s>
<s>
Fixed	B-General_Concept
wireless	I-General_Concept
data	I-General_Concept
(	O
FWD	O
)	O
links	O
are	O
often	O
a	O
cost-effective	O
alternative	O
to	O
leasing	O
fiber	O
or	O
installing	O
cables	O
between	O
the	O
buildings	O
.	O
</s>
<s>
The	O
point-to-point	B-Architecture
signal	O
transmissions	O
occur	O
through	O
the	O
air	O
over	O
a	O
terrestrial	O
microwave	O
platform	O
rather	O
than	O
through	O
copper	O
or	O
optical	B-Architecture
fiber	I-Architecture
;	O
therefore	O
,	O
fixed	B-General_Concept
wireless	I-General_Concept
does	O
not	O
require	O
satellite	B-Application
feeds	O
or	O
local	O
telephone	O
service	O
.	O
</s>
<s>
The	O
advantages	O
of	O
fixed	B-General_Concept
wireless	I-General_Concept
include	O
the	O
ability	O
to	O
connect	O
with	O
users	O
in	O
remote	O
areas	O
without	O
the	O
need	O
for	O
laying	O
new	O
cables	O
and	O
the	O
capacity	O
for	O
broad	O
bandwidth	O
that	O
is	O
not	O
impeded	O
by	O
fiber	O
or	O
cable	O
capacities	O
.	O
</s>
<s>
Fixed	B-General_Concept
wireless	I-General_Concept
devices	O
usually	O
derive	O
their	O
electrical	O
power	O
from	O
the	O
public	O
utility	O
mains	O
,	O
unlike	O
mobile	O
wireless	O
or	O
portable	O
wireless	O
devices	O
which	O
tend	O
to	O
be	O
battery	O
powered	O
.	O
</s>
<s>
Fixed	B-General_Concept
wireless	I-General_Concept
services	O
typically	O
use	O
a	O
directional	O
radio	O
antenna	O
on	O
each	O
end	O
of	O
the	O
signal	O
(	O
e.g.	O
,	O
on	O
each	O
building	O
)	O
.	O
</s>
<s>
The	O
links	O
are	O
usually	O
arranged	O
as	O
a	O
point-to-point	B-Architecture
setup	O
to	O
permit	O
the	O
use	O
of	O
these	O
antennas	O
.	O
</s>
<s>
These	O
antennas	O
are	O
typically	O
designed	O
to	O
be	O
used	O
in	O
the	O
unlicensed	O
ISM	B-Algorithm
band	I-Algorithm
radio	O
frequency	O
bands	O
(	O
900MHz	O
,	O
1.8GHz	O
,	O
2.4GHz	B-Algorithm
and	O
5GHz	O
)	O
,	O
however	O
,	O
in	O
most	O
commercial	O
installations	O
,	O
licensed	O
frequencies	O
may	O
be	O
used	O
to	O
ensure	O
quality	O
of	O
service	O
(	O
QoS	O
)	O
or	O
to	O
provide	O
higher	O
connection	O
speeds	O
.	O
</s>
<s>
With	O
the	O
growing	O
infrastructure	O
of	O
wireless	O
networks	O
,	O
and	O
improving	O
speed	O
and	O
reliability	O
,	O
fixed	B-General_Concept
wireless	I-General_Concept
has	O
also	O
become	O
a	O
viable	O
solution	O
for	O
broadband	O
access	O
.	O
</s>
<s>
Businesses	O
and	O
homes	O
can	O
use	O
fixed-wireless	O
antenna	O
technology	O
to	O
access	O
broadband	O
Internet	O
and	O
Layer	B-Protocol
2	I-Protocol
networks	O
using	O
fixed	B-General_Concept
wireless	I-General_Concept
broadband	O
.	O
</s>
