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Page 171 / 198 Scroll up to view Page 166 - 170
Chapter 18 Wireless Configuration
F
IGURE
174 W
IRELESS
- A
DVANCED
This page allows you to configure advanced features of the WLAN
interface. You can select a particular channel on which to operate,
set a particular transmission rate, fragmentation threshold, RTS
threshold, wakeup interval for clients in power-save mode, beacon
interval for the access point, XPress mode, and set whether short
or long preambles are used.
T
a
b
l
e
4
5
is the description of the different options.
T
ABLE
45 W
IRELESS
A
DVANCED
C
ONFIGURATION
O
PTIONS
Field
Description
Band
Select
802.11b/g
using
wireless
frequency band range.
The radio
frequency remains at 2.437 GHz.
Channel
Enter the appropriate channel to
correspond with your network set-
tings.
The default channel is 11.
All devices in your wireless net-
work must use the same channel
in order to work correctly.
This
router supports auto-channeling.
Auto Channel Timer(min)
Specify the time interval for auto-
channelling.
Confidential and Proprietary Information of ZTE CORPORATION
165
Page 172 / 198
ZXDSL 931WII Operation manual
Field
Description
54g™ Rate
Select the transmission rate for the
network.
The rate of data trans-
mission should be set depending
on the speed of your wireless net-
work. You can select from a range
of transmission speeds, or you can
select
Auto
to have the 931WII
automatically use the fastest pos-
sible
data
rate
and
enable
the
Auto-Fallback feature.
Auto-Fall-
back negotiates the best possible
connection
speed
between
the
931WII and a wireless client. The
default value is
Auto
.
Multicast Rate
Select the multicast transmission
rate for the network.
The rate
of data transmission should be set
depending on the speed of your
wireless
network.
You
can
se-
lect from a range of transmission
speeds,
or you can select
Auto
to have the 931WII automatically
use the fastest possible data rate
and enable the Auto-Fallback fea-
ture. Auto-Fallback negotiates the
best possible connection speed be-
tween the 931WII and a wireless
client. The default value is
Auto
.
Basic Rate
Select the basic transmission rate
ability for the AP.
Fragmentation Threshold
Packets that are larger than this
threshold
are
fragmented
into
multiple packets.
Try to increase
the fragmentation threshold if you
encounter high packet error rates.
Do not set the threshold too low,
since this may result in reduced
networking performance.
RTS Threshold
This
value
should
remain
at
its
default setting of 2347.
If you
encounter inconsistent data flow,
only
minor
reduction
of
the
de-
fault value, 2347, is recommen-
ded. If a network packet is smaller
than the preset RTS threshold size,
the RTS/CTS mechanism is not en-
abled. The 931WII sends Request
to Send (RTS) frames to a partic-
ular receiving station and negoti-
ates the sending of a data frame.
After receiving an RTS, the wire-
less station responds with a Clear
to Send (CTS) frame to acknowl-
edge the right to begin transmis-
sion.
166
Confidential and Proprietary Information of ZTE CORPORATION
Page 173 / 198
Chapter 18 Wireless Configuration
Field
Description
DTIM Interval
Enter a value between 1 – 255 for
the Delivery Traffic Indication Mes-
sage (DTIM). A DTIM is a count-
down informing clients of the next
window for listening to broadcast
and multicast messages.
Beacon Interval
A beacon is a packet of informa-
tion that is sent from a connected
device to all other devices where
it
announces
its
availability
and
readiness.
A beacon interval is
a
period
of
time
(sent
with
the
beacon) before sending the bea-
con again.
The beacon interval is
in milliseconds (ms).
The default
value 100 is recommended.
XPress™ Technology
Select
Enabled
or
Disabled
. This
is a special accelerating technol-
ogy for IEEE802.11g. The default
is Disabled.
Compatible with IEEE 802.11b and
IEEE
802.11g.
Select
a
stand-
ard from the drop-down list.
The
default is 54g Auto.
The drop-
down list box includes the follow-
ing modes:
802.11b Only:
Only stations that
are configured in 802.11b mode
can associate.
If you select it,
the rate of transmission can be 1
Mbps,
2 Mbps,
5.5 Mbps,
or 11
Mbps.
For other selections, you
can select the rate of transmis-
sion from more options, including
1 Mbps, 2 Mbps, 5.5 Mbps, 6 Mbps,
9 Mbps,
11 Mbps,
12 Mbps,
18
Mbps, 24 Mbps, 36 Mbps, 48 Mbps,
and 54 Mbps.
54g LRS: This is a special compat-
ibility mode for 802.11b/g and is
in fact designed for older types of
b-clients. Use this mode if you are
experiencing problems with wire-
less
clients
that
connect
to
the
Guw5.5Z66-5 Access Point. If you
select it, the preamble type is dis-
abled and cannot be set.
54g Auto:
Only stations that are
configured in 802.11b/g mode can
associate.
54g™ Mode
54g Perfomance :
Only stations
that
are
configured
in
802.11g
mode can associate.
Similar to
54g LRS, if you select it, the pre-
amble type is disabled and cannot
be set.
Confidential and Proprietary Information of ZTE CORPORATION
167
Page 174 / 198
ZXDSL 931WII Operation manual
Field
Description
54g™ Protection
The
802.11g
standards
provide
a
protection
method
so
that
802.11g
and
802.11b
devices
can co-exist in the same network
without
“speaking”
at
the
same
time.
Do
not
disable
54g
Pro-
tection
as
802.11b
device
may
need
to
use
your
wireless
net-
work.
In Auto Mode,
the wire-
less
device
uses
RTS/CTS
to
improve
802.11g
performance
in
mixed
802.11g/802.11b
net-
works.
Turn
protection
OFF
to
maximize
802.11g
throughput
under most conditions.
Preamble Type
Preambles are a sequence of bi-
nary bits that help the receivers
synchronize
and
ready
for
re-
ceipt
of
a
data
transmission.
Some
older
wireless
systems
like 802.11b implementation use
shorter
preambles.
If
you
are
having difficulty connecting to an
older 802.11b device, try using a
short preamble.
You can select
short
preamble
only
if
the
54g
mode is set to 802.11b.
Transmit Power
Adjust
the
transmission
range
here.
This tool can be helpful for
security purposes if you wish to
limit the transmission range.
WMM
Select
whether
WMM
is
enabled
or disabled.
Before you disable
WMM, you should understand that
all QoS queues or traffic classes re-
late to wireless do not take effects.
WMM No Acknowledgement
Select
whether
ACK
in
WMM
packet is enabled or disabled.
By
default,
the
Ack
Policy
for
each
access
category
is
set
to
Dis-
abled, meaning that an acknowl-
edge packet is returned for every
packet
received.
This
provides
a more reliable transmission but
increases traffic load,
which de-
creases
performance.
Disabling
the acknowledgement can be use-
ful for voice, for example, where
speed of transmission is important
and packet loss is tolerable to a
certain degree.
WMM APSD
APSD is short for automatic power
save
delivery.
Select
Enable
for
very
low
power
consump-
tion mode.
WMM Power Save is
an improvement to the 802.11e
amendment
adding
advanced
168
Confidential and Proprietary Information of ZTE CORPORATION
Page 175 / 198
Chapter 18 Wireless Configuration
Field
Description
power
management
functionality
to WMM.
Click
Save/Apply
to save the advanced wireless options so that
the changes can take effect.
Wireless - Station Info
Select
Wireless > Station Info
to display the interface as shown
in
F
i
g
u
r
e
1
7
5
.
F
IGURE
175 W
IRELESS
- A
UTHENTICATED
S
TATIONS
The above figure shows authenticated wireless stations and their
status about association and authentication.
Confidential and Proprietary Information of ZTE CORPORATION
169

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