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6
Features
TM
!
Connects multiple computers to a Broadband (Cable or DSL) modem to
share the Internet connection
!
IP Filtering
!
Advanced Firewall features
!
DHCP server supported enables all networked computers to automatically
receive IP addresses
!
Web-based interface for Managing and Configuring
Access Control to manage users on the network
!
!
Supports special applications that require multiple connections
!
Equipped with 4 10/100 Ethernet ports, 1 WAN port, Auto MDI/MDIX
!
URL Filtering
!
Domain Blocking
!
Scheduling
!
Supports NAT with VPN pass-through, providing added security
!
MAC Filtering
Operates in the 2.4GHz and 5GHz frequency ranges
!
!
User-friendly configuration and diagnostic utilities
!
Utilizes
OFDM
technology (
O
rthogonal
F
requency
D
ivision
M
ultiplexing) to
ensure strong wireless signals for both 802.11g and 802.11a
802.1x
Authentication
in conjunction with the RADIUS server verifies the
identity of would be clients
!
WPA
(Wi Fi Protected Access
) authorizes and identifies users based on a
secret key that changes automatically at a regular interval, for example:
!
Backwards compatible with the 802.11b standard to provide a wireless data
rate of up to 11Mbps
!
Fully compatible with the 802.11a and 802.11g standards to provide a wire-
less data rate of up to 54Mbps
!
!
!
TKIP
(Temporal Key Integrity Protocol), in conjunction with a RADIUS
server, changes the temporal key every 10,000 packets, ensuring greater
security
Pre-Shared Key
mode means that the home user, without a RADIUS
server, will obtain a new security key every time the he or she connects
to the network, vastly improving the safety of communications on the
network.
Page 7 / 98
7
LEDs
- Front Panel of Unit
LED
stands for
L
ight-
E
mitting
D
iode.
The
DI-774
has the following LEDs:
WLAN LEDs
for
11a
and
11g
wireless net-
work segments.
A solid light indi-
cates that the
wireless segment is
ready. The LEDs
blink during wireless
data transmission
WAN LED
A solid light
indicates connec-
tion on the WAN
port. This LED
blinks during data
transmission
Local
Network LEDs
A solid light indicates
a connection to an
Ethernet-enabled
computer on ports 1-
4. The LEDs blink
during data transmis-
sion
Status
A blinking light
indicates that the
DI-774 is ready
Power
A solid light
indicates a proper
connection to the
power supply
Page 8 / 98
8
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 cellular 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 wireless LAN technology for many different purposes:
Mobility
-
P
roductivity 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.
Scalability
–
WLANs can be configured in a variety of topologies 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.
Page 9 / 98
9
Standards-Based Technology
The
DI-774 Wireless Broadband Router utilizes the new
802.11g
standard, in addition
to the 802.11a and 802.11b standards.
The IEEE
802.11g
standard is an extension of the 802.11b standard.
It increases the
data rate up to 54 Mbps 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.
.
Wireless Basics
(continued)
Installation Considerations
The D-Link
Air
Xpert DI-774 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 the number of walls and ceilings between the DI-774 and other network
devices
to a minimum - each wall or ceiling can reduce your D-Link wireless
product’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
Keep your product away (at least 3-6 feet or 1-2 meters) from electrical
devices or appliances that generate extreme RF noise.
4
Page 10 / 98
10
Getting Started
Setting up a
Wireless
Infrastructure
Network
You will need broadband Internet access (a Cable or DSL-subscriber line into
your home or office)
Consult with your Cable or DSL provider for proper installation of the modem
Connect the Cable or DSL modem to the DI-774 Wireless Router (
see the
printed Quick Installation Guide included with your router.
)
If you are connecting a desktop computer to your network, install the D-Link
Air
Xpert
DWL-AG520 wireless PCI adapter into an available PCI slot on your
desktop computer.
(See the printed Quick Installation Guide included with the network adapter.)
Install the D-Link DWL-AG650 wireless Cardbus adapter into a laptop computer.
(
See the printed Quick Installation Guide included with the DWL-AG650.
)
Install the D-Link DFE-530TX+ wireless Cardbus adapter into a desktop com-
puter. The four Ethernet LAN ports of the DI-774 are Auto MDI/MDIX and will
work with both Straight-through and Crossover cable.
(
See the printed Quick Installation Guide included with the DFE-530TX+.
)
For a typical wireless setup at home (as shown above),
please do the following:
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