User
Manual
TEW
‐
455APBO
High
Power
Wireless
Outdoor
PoE
Access
Point
23
RSSI
Threshold:
RSSI
Threshold
is
in
the
range
of
‐
128~127
.The
default
value
is
24
.
RSSI
is
defined
as
Received
Signal
Strength
Indication
,
when
the
received
signal
strength
from
peer
is
below
this
threshold,
the
peer
will
be
consider
as
disconnected.
Set
the
threshold
higher
will
make
roaming
happen
earlier,
set
lower
will
allow
weak
signal
peer
to
connect.
In
normal
condition,
the
longer
the
distance,
the
lower
the
signal
strength
between
peers.
You
could
consider
lowering
RSSI
to
increase
the
wireless
coverage.
Increase
the
RSSI
Threshold
to
have
a
more
stable,
but
smaller
coverage
area.
Beacon
Interval:
Beacon
Interval
is
in
the
range
of
1~5000
and
set
in
unit
of
millisecond
.
The
default
value
is
100
msec.
Access
Point
(AP)
in
IEEE
802.11
will
send
out
a
special
approximated
50
‐
byte
frame,
called
“Beacon”.
Beacon
is
broadcast
to
all
the
stations,
provides
the
basic
information
of
AP
such
as
SSID,
channel,
encryption
keys,
signal
strength,
time
stamp,
support
data
rate.
All
the
radio
stations
received
beacon
recognizes
the
existence
of
such
AP,
and
may
proceed
next
actions
if
the
information
from
AP
matches
the
requirement.
Beacon
is
sent
on
a
periodic
basis,
the
time
interval
can
be
adjusted.
By
increasing
the
beacon
interval,
you
can
reduce
the
number
of
beacons
and
associated
overhead,
but
that
will
likely
delay
the
association
and
roaming
process
because
stations
scanning
for
available
access
points
may
miss
the
beacons.
You
can
decrease
the
beacon
interval,
which
increases
the
rate
of
beacons.
This
will
make
the
association
and
roaming
process
very
responsive;
however,
the
network
will
incur
additional
overhead
and
throughput
will
go
down.
DTIM
Interval:
The
DTIM
interval
is
in
the
range
of
1
~
15
.
The
default
is
15
.
DTIM
is
defined
as
Delivery
Traffic
Indication
Message
.
It
is
used
to
notify
the
wireless
stations,
which
support
power
saving
mode,
when
to
wake
up
to
receive
multicast
frame.
DTIM
is
necessary
and
critical
in
wireless
environment
as
a
mechanism
to
fulfill
power
‐
saving
synchronization.
A
DTIM
interval
is
a
count
of
the
number
of
beacon
frames
that
must
occur
before
the
access
point
sends
the
buffered
multicast
frames.
For
instance,
if
DTIM
Interval
is
set
to
3,
then
the
Wi
‐
Fi
clients
will
expect
to
receive
a
multicast
frame
after
receiving
three
Beacon
frame.
The
higher
DTIM
interval
will
help
power
saving
and
possibly
decrease
wireless
throughput
in
multicast
applications.
Fragment
Threshold:
The
Fragment
Threshold
is
in
the
range
of
256
~
2346
byte.
The
default
is
2346
byte.
Each
Wi
‐
Fi
packet
can
be
divided
into
smaller
packets,
marked
with
a
sequential
fragment
number
and
re
‐
assemble
in
the
receiving
ends.
The
purpose
is
to
make
a
short
frame,
instead
of
long
frame,
transmitting
by
radio
in
a
heavy
noisy
environment.
Because
of
sending
smaller
frames,
corruptions
are
much
less
likely
