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  • Thinh

    Thinh

    MemberDec 26, 2013

    Interesting experiments with ADSL splitter

    Experiment 1

    As we know, the ADSL splitter box has 1 input and 2 outputs, one for phone signal line, and the other for internet signal line

    Plug the telecommunication line into the input. Then in the output lines, I make the swapping. I plug the phone line to the internet output, and the internet line to the phone output

    Then I dial the phone to call to a fax number

    Surprisingly, I heard the busy tone, instead of fax tone.

    Note: When I connect in normal way, plug the phone line to the phone output, and internet line to the internet output, this effect does not happen. That means I heard the fax tone as usual

    Experiment 2

    I make the looping back from the output to the input. To do this, I cut into the cable and heal the wire inside

    Then I make the looping as below


    In a), I loop the net output to input, and connect phone output to a telephone machine. No signal at all

    In b), I loop the phone output to input, and connect net output to a modem, this time I can access internet normally
    Schema for second experiment can be found at

    thinhnghiem | Flickr

    Is it working correctly?
    Replies
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Replies
  • yogi.bharadwaj

    MemberDec 31, 2013

    thinhnghiem
    Experiment 1

    As we know, the ADSL splitter box has 1 input and 2 outputs, one for phone signal line, and the other for internet signal line

    Plug the telecommunication line into the input. Then in the output lines, I make the swapping. I plug the phone line to the internet output, and the internet line to the phone output

    Then I dial the phone to call to a fax number

    Surprisingly, I heard the busy tone, instead of fax tone.

    Note: When I connect in normal way, plug the phone line to the phone output, and internet line to the internet output, this effect does not happen. That means I heard the fax tone as usual

    Experiment 2

    I make the looping back from the output to the input. To do this, I cut into the cable and heal the wire inside

    Then I make the looping as below


    In a), I loop the net output to input, and connect phone output to a telephone machine. No signal at all

    In b), I loop the phone output to input, and connect net output to a modem, this time I can access internet normally
    Schema for second experiment can be found at

    <a href="https://www.flickr.com/photos/80780504@N07/" target="_blank" rel="nofollow noopener noreferrer">thinhnghiem | Flickr</a>

    Is it working correctly?
    i think when we connect the modam pin or internet pin it is already sorted to astablish a internet connection. i think the internet connection should be astablish by twao ways first by dialup an 2nd is adsl nodem in dial up[ connection we do not require a modem and the usage charges are as per the calls and the speed is slow in other way modem is used which generates a ip address and communicate and we get high speed internet access.
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  • Thinh Nghiem

    MemberJan 1, 2014

    yogi.bharadwaj
    i think when we connect the modam pin or internet pin it is already sorted to astablish a internet connection. i think the internet connection should be astablish by twao ways first by dialup an 2nd is adsl nodem in dial up[ connection we do not require a modem and the usage charges are as per the calls and the speed is slow in other way modem is used which generates a ip address and communicate and we get high speed internet access.
    So, why the fax tone is busy in the first experiment, and phone tone is corrupt in 2 a)
    Are you sure? This action cannot be undone.
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