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Types of Broadband - PowerPoint PPT Presentation

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Types of Broadband. Wired: Digital Subscriber Lines (DSL) Cable Modem Leased Lines (T1) Fiber Optic Cable Broadband Over Powerline (BPL). Wireless : Satellite Fixed Wireless Wi-Fi WiMAX. Broadband Flavors. Digital Subscriber Line (DSL). Uses plain old phone lines (POTS)

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Types of Broadband

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broadband flavors

Digital Subscriber Lines (DSL)

Cable Modem

Leased Lines (T1)

Fiber Optic Cable

Broadband Over Powerline (BPL)



Fixed Wireless



Broadband Flavors
digital subscriber line dsl
Digital Subscriber Line (DSL)
  • Uses plain old phone lines (POTS)
  • Voice and data over the same line
  • Speed 1.5-8 Mbps
  • Requires location near central phone office or switch (18,000 feet)
  • Phone lines are everywhere but not all of them are able to support DSL
  • Direct one-on-one connection; bandwidth is not shared with neighbors
cable modem
Cable Modem
  • Faster than DSL
  • Uses the same cable television lines that deliver pictures and sound to your TV set
  • Shared connection; speeds can slow down when many people in the same neighborhood are online
  • Easy to install
broadband over powerline bpl
Broadband Over Powerline (BPL)
  • Delivered through power lines
  • Almost all homes and businesses are connected to the power grid
  • Still in early stages of development
  • Potential interference with ham radio signals
  • Speeds similar to DSL and cable
  • Available most places including hard-to-reach rural areas
  • Slower than cable or DSL. WildBlue download speeds up to 1.5 Mbps and upload speeds up to 256Kbps.
  • Trees and heavy rain affects signal
  • Need unobstructed view of southern sky

Graphic from WildBlue.com

fiber optic cable
Fiber Optic Cable
  • Delivered over fiber optic cables
  • Very high bandwidth
  • High cost to build fiber network
  • Low maintenance
wireless broadband
Wireless Broadband
  • Fast relatively inexpensive deployment
  • DSL and cable speeds
  • Many varieties
    • Point-to-Point
    • Point-Multipoint
    • Mesh
    • Hot zones
    • Hot spots
point to point fixed wireless
Point-to-Point Fixed Wireless
  • Uses part of the radio spectrum to send and receive signals. Typically made up of on-the-ground antenna-to-antenna systems.
  • Requires indoor or outdoor antenna
  • Coverage about 5 miles transmitter or access point
  • High bandwidth
  • Usually licensed
  • Backbone or transport layer
  • Line of site
fixed wireless
Fixed Wireless


point to multipoint fixed wireless
Point-to-Multipoint Fixed Wireless
  • Broadband delivery to premise
  • Consumer or business grade
  • One antenna to many sites
  • Line-of-sight
  • Large coverage area
  • Licensed or unlicensed
mesh network wireless
Mesh Network Wireless
  • Nodes (radios)
    • Connect to user
    • Transmit to aggregation point
  • Typically unlicensed
  • Favor urban areas or hot zones



mobile wi fi
Mobile Wi-Fi
  • Wireless fidelity
  • Wi-Fi access points found at cafés, homes, campuses, businesses.
  • Access is limited to 50-300 feet
  • Coverage limited by location and number of transmitters
  • Relatively cheap for providers to set-up
  • End-user equipment cheap and easy to install
where to wi fi
Where to Wi-Fi
  • Hotels, motels, inns, and resorts
  • Airports
  • Public libraries
  • Cybercafes and fast food restaurants
  • Courthouses
  • City parks like NYC's Central Park
  • Public recreation areas and rest stops
  • Truck stops
  • RV parks
  • Wi-Fi on steroids
  • Can cover a large area – 30 miles
  • Still in early stages of development
  • Can support ultra-broadband - a really big pipe with lots of bandwidth and speed. Just what you would need to run your own real-time online video channel.
how much broadband costs depends on
How Much Broadband Costs Depends on…
  • How fast you want to go
  • Residential or business use
  • Pricing of the provider