<s>
Voice	O
over	O
Wireless	O
LAN	B-General_Concept
(	O
VoWLAN	B-Protocol
)	O
,	O
also	O
Voice	O
over	O
WiFi	O
(	O
VoWiFi	B-Protocol
)	O
,	O
is	O
the	O
use	O
of	O
a	O
wireless	O
broadband	O
network	O
according	O
to	O
the	O
IEEE	O
802.11	O
standards	O
for	O
the	O
purpose	O
of	O
vocal	O
conversation	O
.	O
</s>
<s>
In	O
essence	O
,	O
it	O
is	O
Voice	B-Application
over	I-Application
IP	I-Application
(	O
VoIP	B-Application
)	O
over	O
a	O
Wi-Fi	O
network	O
.	O
</s>
<s>
VoWLAN	B-Protocol
can	O
be	O
conducted	O
over	O
any	O
Internet	O
accessible	O
device	O
,	O
including	O
a	O
laptop	O
,	O
PDA	B-Application
or	O
VoWLAN	B-Protocol
units	O
which	O
look	O
and	O
function	O
like	O
DECT	B-Protocol
and	O
cellphones	O
.	O
</s>
<s>
Just	O
like	O
for	O
IP-DECT	B-Protocol
,	O
the	O
VoWLAN	B-Protocol
's	O
main	O
advantages	O
to	O
consumers	O
are	O
cheaper	O
local	O
and	O
international	O
calls	O
,	O
free	O
calls	O
to	O
other	O
VoWLAN	B-Protocol
units	O
and	O
a	O
simplified	O
integrated	O
billing	O
of	O
both	O
phone	O
and	O
Internet	O
service	O
providers	O
.	O
</s>
<s>
Although	O
VoWLAN	B-Protocol
and	O
3G	B-Architecture
have	O
certain	O
feature	O
similarities	O
,	O
VoWLAN	B-Protocol
is	O
different	O
in	O
the	O
sense	O
that	O
it	O
uses	O
a	O
wireless	O
internet	O
network	O
(	O
typically	O
802.11	O
)	O
rather	O
than	O
a	O
cellular	O
network	O
.	O
</s>
<s>
Both	O
VoWLAN	B-Protocol
and	O
3G	B-Architecture
are	O
used	O
in	O
different	O
ways	O
,	O
although	O
with	O
a	O
femtocell	O
the	O
two	O
can	O
deliver	O
similar	O
service	O
to	O
users	O
and	O
can	O
be	O
considered	O
alternatives	O
.	O
</s>
<s>
For	O
a	O
single	O
location	O
organisation	O
it	O
enables	O
use	O
of	O
existing	O
Wi-Fi	O
network	O
for	O
low	O
(	O
or	O
no	O
)	O
cost	O
of	O
use	O
VoIP	B-Application
(	O
hence	O
VoWLAN	B-Protocol
)	O
communication	O
in	O
a	O
similar	O
manner	O
to	O
land	O
mobile	O
radio	O
system	O
or	O
walkie-talkie	B-Application
systems	O
with	O
push	O
to	O
talk	O
and	O
emergency	O
broadcast	O
channels	O
.	O
</s>
<s>
They	O
are	O
also	O
used	O
across	O
multiple	O
locations	O
for	O
mobile	O
workers	O
such	O
as	O
delivery	O
drivers	O
,	O
these	O
workers	O
need	O
to	O
take	O
advantage	O
of	O
3G	B-Architecture
type	O
services	O
whereby	O
a	O
cellular	O
company	O
provide	O
data	O
access	O
between	O
the	O
handheld	O
device	O
and	O
the	O
companies	O
back-end	O
network	O
.	O
</s>
<s>
A	O
voice	B-Protocol
over	I-Protocol
WLAN	I-Protocol
system	O
offers	O
several	O
benefits	O
to	O
organizations	O
,	O
such	O
as	O
hospitals	O
and	O
warehouses	O
.	O
</s>
<s>
as	O
a	O
local	B-General_Concept
network	I-General_Concept
independent	O
of	O
cellular	O
company	O
.	O
</s>
<s>
One	O
of	O
the	O
attractions	O
of	O
VoWLAN	B-Protocol
is	O
that	O
it	O
uses	O
widely	O
available	O
Wi-Fi	O
and	O
as	O
such	O
can	O
be	O
used	O
without	O
involving	O
a	O
service	O
provider	O
(	O
e.g.	O
</s>
<s>
As	O
noted	O
above	O
,	O
in	O
many	O
contexts	O
a	O
femtocell	O
,	O
using	O
cellular	O
technology	O
to	O
connect	O
to	O
standard	O
terminals	O
,	O
can	O
be	O
considered	O
an	O
alternative	O
to	O
VoWLAN	B-Protocol
.	O
</s>
