Wireless and Wired Networks for Internet Access Blake Dumas Wireless Operations, Interlink Computer Connection Broadband Wireless and Home Networking

Part I: Broadband Wireless

Definitions LAN - Local Area Network The computers in your home/office WAN - Wide Area Network Your Internet connection and the people around you Downstream throughput The capacity of data you can receive Upstream throughput The capacity of data you can send

Internet Access Technologies Dialup/ISDN DSL Cable Wireless

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

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

Wireless Technologies GHz Cellular MHZ b/g GHZ a GHZ 6 No phone lines or cable television required Farther distances covered Rural areas are able to receive broadband Interference can pose a problem

Interlink Wireless Based on Motorola Canopy technology Operates at 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

Canopy Equipment Internet Access Point ClusterSubscriber Module

Technical Aspects Uses Motorola protocol rather than – 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

Interlink Wireless Coverage Peoria Itasca Abbott Hillsboro Milford Hubbard

Bandwidth Comparison 56K Dialup ISDN Dual ISDN Res. Wireless Bus. Wireless 500 Kbps Mbps Maximum Download Throughput

Canopy Security Uses proprietary protocol, unlike Fragments data into 64-byte packets and reorders Assembly, order, and disassembly of packets remains unpublished Motorola chip not available to the public 64-bit Data Encryption Standard (DES) encryption

Part II: Home Networking

Single Computer

Wired LAN

Wireless LAN

LAN Hardware Home 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+

LAN Hardware (cont.) Ethernet Adapters Wireless Adapters Netgear FA311Netgear FA511 DLink 520+ Netgear MA401

Residential Wireless Features Persistent “always on” connection 1500 Kbps downstream / 192 Kbps upstream 2 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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