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Wireless and Wired Networks for Internet Access
Blake DumasWireless Operations,
Interlink Computer Connection
Broadband Wireless and Home Networking
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Part I:Broadband Wireless
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Definitions
• LAN - Local Area NetworkThe computers in your home/office
• WAN - Wide Area NetworkYour Internet connection and the people
around you
• Downstream throughputThe capacity of data you can receive
• Upstream throughputThe capacity of data you can send
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Internet Access Technologies
• Dialup/ISDN
• DSL
• Cable
• Wireless
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Low-Speed Technologies
Dial-Up• Requires analog phone line to dial provider• < 56 Kbps maximum downstream• Ties up the phone line
ISDN• Requires digital phone line to dial provider• 64/128 Kbps flavors
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Traditional Broadband
DSL• Uses phone lines to deliver high-frequency
signal separate from phone conversations• Usually 768 kbps – 1.5 Mbps downstream• Only reaches 2-3 miles from Central Office
Cable• Uses cable television infrastructure to deliver
broadband• Typical 1.5 – 2 Mbps downstream• Bandwidth shared among users
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Wireless Technologies
0 1 2 3 4 5 GHz
Cellular700-900MHZ
802.11b/g2.4-2.48GHZ
802.11a5.7-5.8GHZ
6
• No phone lines or cable television required• Farther distances covered• Rural areas are able to receive broadband• Interference can pose a problem
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Interlink Wireless
• Based on Motorola Canopy technology• Operates at 5.7-5.8 GHz• Does not require phone lines or cable• Persistent connection, no waiting to dial• Stationary customer antennas are aimed at
access point clusters• Limited by line-of-sight
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Canopy Equipment
Internet
Access Point Cluster Subscriber Module
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Technical Aspects
• Uses Motorola protocol rather than 802.11• 5.7 – 5.8 GHz frequency range• Dynamic Time Synchronization Spreading
(DTSS) and Frequency Shift Keying (FSK)• Access Points coordinate times each sender can
send• Transceiver and antenna integrated into a single
module• Power and Ethernet delivered on one cable
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Interlink Wireless Coverage
Peoria
Itasca
Abbott
Hillsboro
Milford
Hubbard
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Bandwidth Comparison
56K Dialup
ISDN
Dual ISDN
Res. Wireless
Bus. Wireless
500 Kbps 1.0 1.5 2 Mbps
Maximum Download Throughput
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Canopy Security
• Uses proprietary protocol, unlike 802.11• Fragments data into 64-byte packets and
reorders• Assembly, order, and disassembly of packets
remains unpublished• Motorola chip not available to the public• 64-bit Data Encryption Standard (DES)
encryption
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Part II:Home Networking
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Single Computer
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Wired LAN
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Wireless LAN
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LAN HardwareHome Router• Shares Internet connection among multiple
computers• Hides your internal network from the world• Assigns addresses to computers on the network• Can serve as a wireless access point and print
server
Dlink 714+
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LAN Hardware (cont.)Ethernet Adapters
802.11 Wireless Adapters
Netgear FA311 Netgear FA511
DLink 520+ Netgear MA401
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Residential Wireless Features
• Persistent “always on” connection• 1500 Kbps downstream / 192 Kbps upstream• 2 email accounts• 10 Mb web storage space• Local service and support• Equipment lease included in cost• Less than the cost of an extra phone
line + dialup
$39.95 / mo.$99 one-time installation
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Questions?
Also, visit our website for more information about wireless and other services we provide
www.hillsboro.net