Digital Subscriber Line Definition

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					Digital Subscriber Line
       Sean Moran
       Tony Nowak
    Drew Van Norman
        Ed Wilbert
                   Agenda
Definition
How Does it work
Advantages
Disadvantage
Comparisons
Decision
Conclusion
              Digital Subscriber Line
                      Definition
Digital Subscriber Line (DSL) technology is a
  modem technology that uses existing twisted-
  pair telephone lines to transport high-bandwidth
  data, such as multimedia and video, to service
  subscribers.



  Source: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/dsl.htm
                  How does it work?
Uses available capacity (bandwidth) of twisted wire
  copper phone lines
     Voice: less than 4000 Hz
     Data: higher than 4000 Hz
     DSL: 25 kHz – 1100 kHz
Customer: DSL Transceiver (DSL modem)
Provider: DSL Access Multiplexer (DSLAM)


 Source:   http://www.dsllife.com/dsltut.htm
           http://computer.howstuffworks.com/dsl3.htm
                          Advantages
Uses existing twisted pair copper wire for
  transmission
Always on
High bandwidth with small changes to existing
  telecommunications infrastructure
Allows simultaneous use of telephone
      Not the same as voice over IP



 Source:   http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/dsl.htm
           http://www.dsllife.com/dsltut.htm
                            Limitations
Length of the copper line between customer and
  central office
    18,000 feet maximum

Not compatible with fiber optic cables
Not compatible with loading coils




 Source:   http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/dsl.htm
           http://computer.howstuffworks.com/dsl3.htm
                        Comparison - 1
Provider of high speed internet service independent
  of phone service.
Features: Downstream speed: Up to 1.5Mbps*
          Upstream speed: Up to 128kbps*
          8 personal email addresses
          10 MB of personal Web space per address
Price: Monthly Rate - $49.95
       Standard activation fee - $99.00
Web site: Black text on white background
           Large amount of descriptive information
           Limited time offers and free for XX days
    Source: http://www.earthlink.net
                      Comparison - 2
Provider of high speed internet service in-connection
  with phone service.
Features: 256kbps or 768kps access plans*
           4 personal email addresses
           5 MB of personal web space per address
           200 local calls with 60 minutes long distance
Price: Monthly Rate - $53.00 (24 month)
       Standard activation fee - Free
Web site: White text on bold solid colored background
          Controlled amount of descriptive information
          Straight forward pricing , two options available

    Source: http://www.tdsmetro.com
                     Comparison - 3
Provider of high speed internet service independent of
   phone service.
Features: 128Kbps - 768Kbps access speeds
           9 personal e-mail addresses
           10 MB of personal web space per address
           30 day money back guarantee
Price: Monthly Rate - $29.95 (6 month online promotion)
       Standard activation fee - ??
Web site: Black text on white background
          Relatively easy to navigate
          Cannot find standard monthly cost of service

   Source: http://www22.verizon.com
                     Comparison - 4
Provider of high speed internet service independent of
   phone service.
Features: 348kbps, 768kps,or 1.5Mbps access plans*
           10 personal e-mail addresses
           10 MB of personal web space per address
           Yahoo Classifieds, Auctions,Consumer Reports
Price: Rate - $39.95 (12 month)
       Standard activation fee - ??
Web site: White text on bold solid colored background
          Informative and relative easy to navigate
          Extra steps to get package pricing

   Source: http://www.sbc.com
                   Decision
TDS Metrocom               SBC
  Factors:                  Factors:
  Price                     Price
  Voice & data service      Yahoo! DSL browser
  Regional provider         Several Plans
  Web site                  Web site
      (straight forward)     (informative &
                                   navigational)
                  Conclusion
Viable option for high speed internet access
     Uses existing phone lines
     Requires DSL modem
     Limited by physical location
Multiple providers available on market
     Phone service option
     Varied plans and options
     Competitively priced

				
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posted:9/22/2011
language:English
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