Interesting experiments with ADSL splitter

Discussion in 'Internet & Networking' started by thinhnghiem, Feb 8, 2014.

  1. thinhnghiem

    thinhnghiem Newbie

    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
    I have executed many experiments with this device, and some give out interesting results. I list here 5 of them. Their schema can be found in the URL below

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    Experiment a)
    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 b)
    I make the looping back from the net output to the input. To do this, I cut into the cable and heal the wire inside, with the same color correspondingly (green to green, red to red)
    Then, I connect phone output to a telephone machine.
    Result: No tone heard when I picked up the phone machine

    Experiment c)
    I make the connection between phone output and net output, by cutting into the cable and healing the wire inside, with the same color correspondingly (green to green, red to red), similarity as I did in experiment b)
    Then, I connect phone output to a telephone machine.
    Result: No tone heard when I picked up the phone machine

    Experiment d)
    Wall line is plugged into the net output (Not the input). Then, I make the looping back from the phone output to the input. To do this, I cut into the cable and heal the wire inside, with the reverse color correspondingly (green to red, red to green)
    Then, I connect input line to a telephone machine.
    Result: No tone heard when I picked up the phone machine
    Note: If I repeat the same experiment by healing the wire with the same color correspondingly (green to green, red to red), no issue happens. The tone can be heard from the phone machine
    Experiment e)
    Wall line is plugged into the phone output (Not the input). Then, I make the looping back from the net output to the input. To do this, I cut into the cable and heal the wire inside, with the same color correspondingly (green to green, red to red)
    Then, I connect input line to a modem to emit Internet signal
    Result: No internet signal is created
     
    Last edited by a moderator: Feb 9, 2014
  2. Adrian Wong

    Adrian Wong Da Boss Staff Member

    That's interesting... but what were you hoping to achieve?
     
  3. thinhnghiem

    thinhnghiem Newbie

    I cannot predict what will happen, and that is the interesting effect of these experiment

    The reason I posted here is I cannot give out the explanation of result, and I wonder if they can be helpful in opening new discovery
     

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