DSL

w^rl0rdw^rl0rd Member Posts: 329
in Network+
How is DSL digital if it carries packets over a phone line?
Doesn't it use existing copper wires that could otherwise be used for voice?
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  • RussSRussS Member Posts: 2,068 ■■■□□□□□□□
    Why does using existing lines mean it can not be digital?

    Have a look http://computer.howstuffworks.com/dsl1.htm to understand better.
    www.supercross.com
    FIM website of the year 2007
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  • w^rl0rdw^rl0rd Member Posts: 329
    Thanks. In the article it says

    Modern equipment that sends digital rather than analog data can safely use much more of the telephone line's capacity. DSL does just that

    I knew DSL was digital, but for some reason I didn't think it used the same wires that were used by analog. Thanks for clearing this up.
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  • RussSRussS Member Posts: 2,068 ■■■□□□□□□□
    I always find that a little research tends to clear things up better than someone just giving you the answer. I guess you tend to see a few different ways of putting the same answer and one of them sticks icon_smile.gif
    www.supercross.com
    FIM website of the year 2007
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  • goldorakgoldorak Member Posts: 23 ■□□□□□□□□□
    icon_idea.gif
    1 - DSL is broadband
    2 - Broadband is analog
    3 - You have a modem that converts digital signals to analog signals
    4 - over
    Goldorak
    ~~~~~~~~~~~~~~~~~~~~~
    A little knowledge is dangerous...
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  • w^rl0rdw^rl0rd Member Posts: 329
    goldorak wrote:
    icon_idea.gif
    1 - DSL is broadband
    2 - Broadband is analog
    3 - You have a modem that converts digital signals to analog signals
    4 - over

    I don't think so. DSL stands for Digital Subscriber Line.
    This is why I asked the question. I know that it uses a phone line.
    Also, cable users use cable modems, but DSL users use DSL routers.
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  • janmikejanmike Member Posts: 3,076
    Bottom line, digital is digital.

    For an intro, go to http://computer.howstuffworks.com/dsl1.htm
    "It doesn't matter, it's in the past!"--Rafiki
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  • w^rl0rdw^rl0rd Member Posts: 329
    Ouch janmike.

    Lets go back to why I posted the question originally.
    First of all, I KNOW WHAT DIGITAL MEANS!
    I know the difference between digital and analog.
    I know that DSL is digital.
    I know what a modem does.

    I merely wanted to know how the technology was implemented; how digital and analog share the same medium. Is it the same kind of copper wire used in twisted pair?

    Thanks for all of the help anyway.
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  • janmikejanmike Member Posts: 3,076
    OOPS! Please excuse my overlook. String is long and forgot the previous content! I apolgize. Wasn't trying to be condescending.

    So yours was a media question? Yes, twisted pair--same stuff.
    "It doesn't matter, it's in the past!"--Rafiki
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  • mwgoodmwgood Member Posts: 293
    Hi,

    How DSL signal shares the same wires as the Analog signal is that the Analog is generally transmitted in a frequency range of below 4 KHz. The digital signal comes in at higher frequencies - so that a filter blocks out the DSL signal above 4 KHz.

    -Mike

    http://computer.howstuffworks.com/dsl4.htm
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