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Page 56 / 74 Scroll up to view Page 51 - 55
Chapter 2: WEB Configuration
51
54g
TM
Network Mode:
There are three modes for you to choose, please check the specification of your wireless card
and choose
a proper setting.
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.
Rate:
It decides the speed of 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.
Output Power:
This setting decides the output power of this device. You may use it to economize on electricity by
selecting lower percentage of power output.
Illustrations contained in this document are for representation only.
Page 57 / 74
Chapter 2: WEB Configuration
52
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 communications 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
z
Wireless Bridging:
Choose
Disabled
to shutdown this function; select
Enabled
to turn on the function of WDS.
z
Remote Bridges
:
Enter the MAC Addresses of the remote Bridges to relay the signals for each other.
z
Apply:
After proper configuration, click Apply to invoke the settings.
Illustrations contained in this document are for representation only.
Page 58 / 74
Chapter 2: WEB Configuration
53
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.
z
Enable WMM:
This field allows you to enable WMM to improve multimedia transmission.
z
Enable WMM No-Acknowledgement
:
This field allows you to enable WMM No-Ackonwledgement.
z
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 for a particular AC for generating a random number for the backoff.
Illustrations contained in this document are for representation only.
Page 59 / 74
Chapter 2: WEB Configuration
54
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.
Discard Oldest First
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)
Illustrations contained in this document are for representation only.
Page 60 / 74
Chapter 3: Networking
55
Illustrations contained in this document are for representation only.
Chapter 3: Networking
Communications
Data communication involves the flow of packets of data from one device to another. These devices
include personal computers, Ethernet, cable modems, digital routers and switches, and highly integrated
devices that combine functions, like the Wireless Cable Gateway.
The gateway integrates the functionality often found in two separate devices into one. It’s both a cable
modem and an intelligent wireless gateway networking device that can provide a host of networking
features, such as NAT and firewall. Figure 2 illustrates this concept, with the cable modem (CM)
functionality on the left, and networking functionality on the right. In this figure, the numbered arrows
represent communication based on source and destination, as follows:
Type of Communication
1.
Communication between the Internet and your PCs
Example: The packets created by your request for a page stored at a web site, and the contents of that
page sent to your PC.
2.
Communication between your cable company and the cable modem side
Example: When your cable modem starts up, it must initialize with the cable company, which requires
the cable company to communicate directly with the cable modem itself.
3.
Communication between your PCs and the networking side
Fig.46
Example: The Wireless Cable Gateway offers a number of built-in web pages which you can use to

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