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6
Wireless Basics
D-Link
wireless products are based on industry standards to provide easy-to-use and
compatible high-speed wireless connectivity within your home, business or public access
wireless networks. D-Link wireless products will allow you access to the data you want,
when and where you want it. You will be able to enjoy the freedom that wireless networking
brings.
A WLAN is a computer network that transmits and receives data with radio signals
instead of wires. WLANs are used increasingly in both home and office environments,
and public areas such as airports, coffee shops and universities. Innovative ways to
utilize WLAN technology are helping people to work and communicate more efficiently.
Increased mobility and the absence of cabling and other fixed infrastructure have proven
to be beneficial for many users.
Wireless users can use the same applications they use on a wired network. Wireless
adapter cards used on laptop and desktop systems support the same protocols as
Ethernet adapter cards.
People use WLAN technology for many different purposes:
Mobility
-
Productivity increases when people have access to data in any location
within the operating range of the WLAN. Management decisions based on real-time
information can significantly improve worker efficiency.
Low Implementation Costs
–
WLANs are easy to set up, manage, change and
relocate. Networks that frequently change can benefit from WLANs ease of implementation.
WLANs can operate in locations where installation of wiring may be impractical.
Installation and Network Expansion
-
Installing a WLAN system can be fast and
easy and can eliminate the need to pull cable through walls and ceilings. Wireless
technology allows the network to go where wires cannot go - even outside the home or
office.
With the DWL-G810 you can provide instant wireless access to the LAN (Local Area
Network) for Ethernet-enabled devices. With an Ethernet (CAT5) cable simply connect
the DWL-G810 to the Ethernet port of a network device (such as a printer or web camera)
to establish a wireless connection with another device equipped with a wireless network
adapter set to Ad-Hoc mode.
If you are planning a larger wireless network, D-Link offers a wide array of products for
most of your wireless local area network (WLAN) needs. In this section, we discuss
typical WLANs and their components. Much of the advice given here may be helpful in
setting up the DWL-G810. It may also give you some ideas, if you plan to expand your
wireless network.
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7
The DWL-G810 is compatible with 802.11g and 802.11b wireless products, which include
:
D-Link
Air
DWL-650,D-Link
Air
Plus DWL-650+,
D-Link
Air
Plus
Xtreme G
DWL-G650
2.4GHz Wireless Cardbus Adapters used with laptop computers
D-Link
Air
Plus
Xtreme G
DWL-G520, D-Link
Air
DWL-520, D-Link
Air
Plus
DWL-520+
2.4GHz Wireless PCI cards used with desktop computers
D-Link
Air
Plus DWL-900AP+, D-Link
Air
Plus
Xtreme G
DWL-2000AP
2.4GHz Wireless Access Points
D-Link
Air
Plus DI-614+, DI-714P+, D-Link
Air
Plus
Xtreme G
DI-624 and
D-Link
Air
Xpert
DI-774
Wireless Broadband Routers
Standards-Based Technology
The DWL-G810 High-Speed Ethernet Wireless Bridge utilizes the
802.11b
and the
802.11g
standard. The IEEE
802.11g
standard is an extension of the 802.11b standard.
It achieves
a maximum wireless signal rate of up to 54Mbps*
within the 2.4GHz band, utilizing
OFDM technology.
This means that in most environments, within the specified range of this device, you will
be able to transfer large files quickly or even watch a movie in MPEG format over your
network without noticeable delays. This technology works by transmitting high-speed
digital data over a radio wave utilizing
OFDM
(
O
rthogonal
F
requency
D
ivision
M
ultiplexing)
technology.
OFDM
works by splitting the radio signal into multiple smaller sub-signals
that are then transmitted simultaneously at different frequencies to the receiver.
OFDM
reduces the amount of
crosstalk
(interference) in signal transmissions. The D-Link DWL-
G810 will automatically sense the best possible connection speed to ensure the greatest
speed and range possible.
The DWL-G810 is backwards compatible with 802.11b devices. This means that if you
have an existing 802.11b network, the devices in that network will be compatible with
802.11g devices at speeds up to 11Mbps in the 2.4GHz range.
Wireless Basics (continued)
Scalability
–
WLANs can be configured in a variety of ways to meet the needs of
specific applications and installations. Configurations are easily changed and range
from Peer-to-Peer networks suitable for a small number of users to larger infrastructure
networks to accommodate hundreds or thousands of users, depending on the number of
wireless devices deployed.
Inexpensive Solution
-
Wireless network devices are as competitively priced as
conventional Ethernet network devices.
±
±
±
±
TM
TM
TM
TM
TM
*Maximum wireless signal rate derived from IEEE Standard 802.11g specifications. Actual data throughput
will vary. Network conditions and environmental factors lower actual data throughput rate.
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8
Installation Considerations
The D-Link
Air
Plus Xtreme G
DWL-G810
lets you access your network using a
wireless connection from virtually anywhere within its operating range. Keep in mind,
however, that the number, thickness and location of walls, ceilings, or other objects that
the wireless signals must pass through, may limit the range. Typical ranges vary depending
on the types of materials and background RF (radio frequency) noise in your home or
business. The key to maximizing wireless range is to follow these basic guidelines:
Keep your product away (at least 3-6 feet or 1-2 meters) from electrical
devices or appliances that generate RF noise.
4
Keep the number of walls and ceilings between the DWL-G810 and other network
devices to a minimum - each wall or ceiling can reduce your DWL-G810’s range
from 3-90 feet (1-30 meters.) Position your devices so that the number of walls
or ceilings is minimized.
1
Be aware of the direct line between network devices. A wall that is 1.5 feet thick
(.5 meters), at a 45-degree angle appears to be almost 3 feet (1 meter) thick. At
a 2-degree angle it looks over 42 feet (14 meters) thick!
Position devices so
that the signal will travel straight through a wall or ceiling (instead of at an
angle) for better reception.
2
Building materials can impede the wireless signal - a solid metal door or aluminum
studs may have a negative effect on range. Try to position wireless devices and
computers with wireless adapters so that the signal passes
through drywall or
open doorways and not other materials.
3
Wireless Basics (continued)
TM
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9
Getting Started
With its default settings, the DWL-G810, when activated, will connect
with other D-Link
Air
Plus Xtreme G
products, right out of the box.
There are basically two modes of networking:
Infrastructure
– using an access point or router
Ad-Hoc
– directly connecting to another computer, for Peer-to-
Peer communication, using wireless network adapters on
each computer, such as two or more DWL-G520 Wireless
Network
Adapters
±
±
TM
This example illustrates an
Ad-Hoc
setup. Simply connect the DWL-G810 (
refer to the
Quick Installation Guide
) to your Ethernet-capable network device and you will be able
to connect wirelessly with other devices also connected to DWL-G810’s.
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10
Getting Started (continued)
This example illustrates an
Infrastructure
setup. To connect the DWL-G810
to a wireless
network with a wireless router or access point, please refer to the printed Quick Installation
Guide included with the product. Web configuration is required to connect the DWL-G810.
Infrastructure Mode

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