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Chapter 2: WEB Configuration
Illustrations contained in this document are for representation only.
49
4. 802.11/ Advanced
This page allows you to configure some advanced settings. The factory default values should provide
good results in most cases
. We don’t recommend you change these settings unless you have technical
knowledge of 802.11b wireless technology.
For expert users, details of all settings on this web page are provided below.
Fig. 43
54g
TM
Mode:
There are four modes for you to choose, please check the specification of your wireless card
and choose
a proper setting.
Basic Rate Set:
Select
default
or
All
basic rate.
54g
TM
Protection:
Select
Auto
to turn on the 54g
TM
protection; select
Off
to turn down the protection.
Xpress
TM
Technology:
When Xpress is turned on, aggregate throughput (the sum of the individual throughput speeds of each
client on the network) can improve by
up to
27% in 802.11g-only networks, and
up to
75% in mixed
networks comprised of 802.11g and 802.11b standard equipment.
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Chapter 2: WEB Configuration
50
Illustrations contained in this document are for representation only.
Afterburner
TM
Technology:
Afterburner technology is an enhancement f
or the 54g™ platform,
It maximum performance
implementation of the IEEE 802.11g standard. Products with this new technology provide up to 40
percent greater throughput than typical standard 802.11g systems without impacting the performance of
neighboring wireless LANs.
Rate:
This determines the speed of the data transmission. There are several rates provided here for you to
choose. Choose any one of it according to your needs by using the drop-down menu.
Beacon Interval:
Set the period of beacon transmissions to allow mobile stations to locate and identify a BSS. The measure
unit is ―time units‖ (TU
) of 1024 microseconds. (Value range: 1~65535)
DTIM Interval:
The value you set here is used to inform mobile stations when multicast frames that have been buffered at
the Wireless Gateway will be delivered and how often that delivery occurs. (Value range: 1~255)
Fragmentation Threshold:
Set the number of the fragmenting frames to make the data to be delivered without errors induced by the
interference. Frames longer than the value you set here are fragmented before the initial transmission into
fragments no longer than the value of the threshold. (Value range: 256~ 2346)
RTS Threshold:
Set the value for sending a request to the destination. All the frames of a length greater than the threshold
that you set here will be sent with the four-way frame exchange. And, a length less than or equal to the
value that you set will not be proceeded by RTS. (Value range: 0~ 2347)
NPHY Rate:
This determines the speed of the data transmission. There are several rates provided here for you to
choose. Choose any one of it according to your needs by using the drop-down menu.
802.11n Protection:
Select
Auto
to turn on the 802.11n protection; select
Off
to turn down the protection.
Multicast Rate:
The Multicast Rate option sets the threshold throughput level a wireless client must obtain in order to be
"accepted" by the base station. The lower this value, theoretically, the greater number of clients that can
connect, especially those at greater distances from the base station. At the opposite end, the higher this
number, only those wireless clients that can achieve the higher throughput value will be able to connect.
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Page 58 / 76
Chapter 2: WEB Configuration
Illustrations contained in this document are for representation only.
51
5. Bridging
The Bridging page provides a location where settings can be adjusted related to the WDS (
Wireless
Distribution System)
feature.
WDS is a system that enables the interconnection of access points wirelessly. It may also be referred to as
repeater mode because it appears to bridge and accept wireless clients at the same time (unlike traditional
bridging).
The wireless gateway can be placed in a mode that allows the gateway to communicate with other
―extender‖ wireless access points either exclusively or mixed with communicat
ions to local PCs. Use this
page to designate the Remote Bridges the gateway is allowed to communicate with, and to select the
Wireless Bridging mode.
Fig. 44
Wireless Bridging:
Choose
Disabled
to shutdown this function; select
Enabled
to turn on the function of WDS.
Remote Bridges
:
Enter the MAC Addresses of the remote Bridges to relay the signals to each other.
Apply:
After proper configuration, click Apply to invoke the settings.
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Chapter 2: WEB Configuration
52
Illustrations contained in this document are for representation only.
6. 802.11 QoS (WMM) Settings
Wi-Fi Multimedia (WMM) is a component of the IEEE 802.11e wireless LAN standard for quality of
service (QoS). The QoS assigns priority to the selected network traffic and prevents packet collisions and
delays thus improving VoIP calls and watching video over WLANs.
WMM Support:
This field allows you to enable WMM to improve multimedia transmission.
No-Acknowledgement
:
This field allows you to enable WMM No-Acknowledgement.
Power Save Support:
This field allows you to enable WMM Power-Save-Support.
Fig. 45
EDCA AP Parameters:
The parameters for Access Point (AP) of EDCA (enhanced distributed channel access).
EDCA STA Parameters:
The parameters for WIFI station of EDCA.
CWmin:
This attribute shall specify the value of the minimum size of the window that shall be used by a QAP
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Chapter 2: WEB Configuration
Illustrations contained in this document are for representation only.
53
for a particular AC for generating a random number for the backoff.
CWmax:
This attribute shall specify the value of the maximum size of the window that shall be used by a
QAP for a particular AC for generating a random number for the backoff.
AIFSN:
This attribute shall specify the number of slots, after a SIFS duration, that the QAP, for a particular
AC, shall sense the medium idle either before transmitting or executing a backoff.
TXOP (b) Limit (usec)/ TXOP (a/g) Limit (usec):
This attribute shall specify the maximum number of microseconds of an EDCA TXOP for a given
AC at the QAP.
If buffer full and parameter is TRUE then discard oldest first.
4 AC’s (Access Category) are defined:
AC_BK (background)
AC_BE (best-effort)
AC_VI (Video)
AC_VO (Voice)
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