Company Profile

1
DIGITAL TRENDS, INC.

• OUR PARTNER (D-Link International Pte. Ltd.)
• - Multinational communications networking
  company
• - Based in Singapore
• - Manufacturing offices are in California,
  USA, Taiwan,
• Hin-Chu, Dong Guan Province, China
  Verna, India
• - Asias largest and leading manufacturer
  of networking
• connectivity and communications products
• - Acknowledged as the ideal provider of
  networking
• solutions and services worldwide

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Wireless LAN
Bong A. Balanquit Regie P. Ebalobor
3
What is Wireless LAN?

• A flexible data communication system implemented
  as an extension to, or an alternative for, a
  wired LAN
• Use radio frequency (RF) technology to transmit
  and receive data over the air, with minimum need
  for wired connections

4
Agenda - Wireless LAN

• Advantages of Wireless LAN.
• Wireless LAN Evolution.
• Frequency Ranges.
• Two Kinds of Wireless Networks.
• What is Roaming?
• Security Issue.
• Design and Implementation Wireless LAN

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Advantages of Wireless LAN
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Advantages of Wireless LAN
Mobility / Flexibility
Why go wireless?
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Advantages of Wireless LAN
Simplicity
Why go wireless?

• Installation Speed
• and Simplicity

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Advantages of Wireless LAN
Scalability
Why go wireless?
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Wireless LAN Technologies
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Wireless LAN Technologies
Note 802.11b and 802.11g are proprietary
technology on D-Link Wireless Plus Products
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Frequency Ranges
The Electromagnetic Spectrum
Visible Light
Ultra Violet
Extremely Low
Infrared
Frequency Waves
X-Rays
Microwave
Radio
Systems
802.11b WLANs _at_ 2.4 GHz
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Two Kinds of Wireless Networks
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• Ad-Hoc Mode (also known as peer-to-peer mode)

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• Infrastructure Mode

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Four Operating Modes (Access Point)

• Access Point Mode
• Standard Operating Mode

File Server
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Four Operating Modes (Access Point)

• Wireless Bridge (Point-to-Point)
• Proprietary operating mode

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Four Operating Modes (Access Point)

• Wireless Bridge Point-to-MultiPoint
• Proprietary operating mode

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Four Operating Modes (Access Point)

• Wireless LAN Client
• Proprietary operating mode

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Roaming

• Client machines moves from the coverage area of
  one access point to another
• Roaming allows the connection to be handed off to
  the new AP

Wired File Server
Wired Computer
Wired Ethernet Network
Access Point
Access Point
AREA 1
AREA 2
Roaming Network
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Security Issue

• Data Privacy (Wired Equivalent Privacy - WEP)
• Protect the data while it is transferred from one
  station to another
• Rely on a secret key that is shared between the
  client machines and the access points
• The secret key (64/128/256-bit) is used to
  encrypt packets before transmitted

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Design and Implement Wireless LAN
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• Keep the no. of walls to a minimum
• Direct line between the APs and client machines

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• Building materials make a difference
• Solid metal door will degrade the distance
• Position the APs and client machines so the the
  signal passes through open doorways or doors with
  other materials
• Keep the wireless products away from electrical
  devices that generate radio frequency
• Eg. microwave ovens, etc...

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• Make sure that the antenna is positioned for the
  best reception
• The best reception of different types of antenna
  varies
• The original antenna from D-Link is
  Omni-Directional
• You must understand the antenna

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Antenna Accessories

• ANT24-Series
• RP-SMA Connectors
• Various Strength
• 4, 5, 8, 12, 14, 18, 21 dBi
• Various Types
• Omni-direction, Panel, Yagi
• Indoor Outdoor Models
• Surge Protectors Available

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Outdoor Wireless Solution
DWL-1750 Outdoor 11Mbps wireless bridge
DWL-1700AP Outdoor 11Mbps wireless AP
DWL-2700AP Outdoor 54Mbps wireless AP/Bridge
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THE END
Thank You! GOD BLESS
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Position of Antenna

• Omni-Directional Antenna

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Position of Antenna

• Patch or Panel Antenna

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Position of Antenna

• Ceiling-Mount Antenna

Horizontal Coverage
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Position of Antenna

• Yagi Antenna

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D-Link AirPlus Series

• Support data transfer rates at up to 22Mbps
• Wi-Fi certification compatibility
• IEEE 802.11b wireless LAN industry compliance
• Support 256-bit industry-standard WEP encryption
  protocol

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Wireless Ethernet Compatibility Alliance (WECA)

• http//www.wi-fi.org/certified_products.asp

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Wireless Ethernet Compatibility Alliance
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DWL-900AP (Access Point)

• 10/100Mbps auto-sensing port to bridge wireless
  to wired network
• Four operating modes
• Detachable SMA reverse dipole antenna
• Manage via web browser
• Built-in DHCP Server

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DWL-650 (Cardbus Adapter)

• 32-bit Cardbus
• PC Card Type II
• User Friendly Utility Program for easy setup
• Support Windows 98, 2000, ME XP

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DWL-520 (PCI Adapter)

• 32-bit Bus Master PCI adapter
• Detactable SMA reverse dipole antenna
• User Friendly Utility Program for easy setup
• Support Windows 98, 2000, ME XP

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Indoor Wireless Solution Wireless Client
Adapters
DWL-520 PCI 11 / 44 Mbps wireless card
DWL-G520 PCI 54 / 88 Mbps wireless card
DWL-650 PCMCIA 11 / 44 Mbps wireless card
DWL-G650 PCMCIA 54 / 88 Mbps wireless card
DWL-120 USB 11 / 44 Mbps wireless card
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Indoor Wireless Solution Wireless Access Point
(AP)
DWL-900AP Indoor 11 / 44 Mbps wireless AP
DWL-2000AP Indoor 54 / 88 Mbps wireless AP
DWL-1000AP Indoor 11 / 44 Mbps Enterprise
wireless AP
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Indoor Wireless Solution Wireless Print Server
DP-313 11Mbps Wireless 3 Parallel Port Print
Server
DP-311U/ 311P 11 Mbps wireless Print Server
for USB or Parallel printer
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Outdoor Wireless Solution
DWL-1750 Outdoor 11Mbps wireless bridge
DWL-1700AP Outdoor 11Mbps wireless AP
Upcoming..
DWL-2700AP Outdoor 54Mbps wireless AP/Bridge
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Design and Implement Wireless LAN
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Channels for deployment

• 3 non-overlapping channels (1, 6, 11)
• Min. interference

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Channels for deployment
The nearer your wireless client is towards the
wireless access point, the better speed and
reliability you will get
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Wireless Design 1

• Cabling available only inside the walls
• Patch antenna for access points that are located
  at corners
• Access point located in the centre will be using
  dipole antenna

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Wireless Design 2

• Cabling available in the ceiling
• More complete wireless coverage
• All access point are using using
  omni-directional antennas

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Wireless Design 3

• Cabling only on one side of the wall
• Yagi antenna will beaming the long range signal
• Dipole antenna to cover the right side of the
  room

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Design and Implement Wireless LAN

• Low Density
• Provide large coverage with minimum of APs

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Design and Implement Wireless LAN

• Medium Density
• Provide good coverage and throughput with approx.
  20 overlap in AP coverage

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Design and Implement Wireless LAN

• High Density
• Provide maximum throughput with approx. 50
  overlap in AP coverage and use of multiple
  channels