Wireless
Settings
D-Link
Unified
Access
Point
Administrator’s
Guide
November
2011
Page
57
Unified
Access
Point
Administrator’s
Guide
Using
the
802.11h
Wireless
Mode
For
802.11a
radios,
if
the
regulatory
domain
requires
radar
detection
on
the
channel,
the
Dynamic
Frequency
Selection
(DFS)
and
Transmit
Power
Control
(TPC)
features
of
802.11h
are
automatically
activated.
There
are
a
number
of
key
points
about
the
IEEE
802.11h
standard:
• 802.11h
only
works
for
the
802.11a
band.
It
is
not
required
for
802.11b
or
802.11g.
• If
you
are
operating
in
an
802.11h
enabled
domain,
the
AP
attempts
to
use
the
channel
you
assign.
If
the
channel
has
been
blocked
by
a
previous
radar
detection,
or
if
the
AP
detects
a
radar
on
the
channel,
then
the
AP
automatically
selects
a
different
channel.
• When
802.11h
is
enabled,
the
AP
will
not
be
operational
in
the
5GHz
band
for
at
least
60
seconds
due
to
radar
scanning.
• Setting
up
WDS
links
may
be
difficult
when
802.11h
is
operational.
This
is
because
the
operating
channels
of
the
two
APs
on
the
WDS
link
may
keep
changing
depending
on
channel
usage
and
radar
interference.
WDS
will
only
work
if
both
the
APs
operate
on
the
same
channel.
For
more
information
on
WDS,
see
“Configuring
Load
Balancing”
on
page
88
.
Enabling
AeroScout™
Engine
Support
The
AeroScout
Engine
(AE)
is
a
software
platform
produced
by
AeroScout
Inc.
for
location
‐
based
services.
The
AE
can
determine
the
physical
location
of
802.11
‐
capable
AeroScout
devices.
The
AE
communicates
with
APs
that
have
the
AE
protocol
enabled
in
order
to
collect
information
about
the
RF
devices
detected
by
the
APs.
The
DWS
‐
4000
Series
switch
supports
only
direct
communication
between
the
AE
and
the
APs.
When
operating
in
managed
mode,
the
AE
is
configured
with
the
IP
address
of
the
managed
access
points
from
which
it
collects
information.
The
DWS
‐
4000
Series
switch
does
not
communicate
with
the
AE.
AeroScout
tags
operate
only
in
802.11b/g
mode.
Therefore,
network
administrators
who
use
the
AeroScout
tags
must
configure
at
least
one
radio
on
APs
that
are
expected
to
detect
tags
in
either
802.11b/g
or
802.11b/g/n
mode.
The
radios
configured
in
2.4
GHz
IEEE
802.11n
mode
or
any
of
the
5
GHz
modes
cannot
detect
AeroScout
tags.
Note:
After
you
configure
the
wireless
settings,
you
must
click
Apply
to
apply
the
changes
and
to
save
the
settings.
Changing
some
settings
might
cause
the
AP
to
stop
and
restart
system
processes.
If
this
happens,
wireless
clients
will
temporarily
lose
connectivity.
We
recommend
that
you
change
AP
settings
when
WLAN
traffic
is
low.
