Interesting experiments with ADSL splitter

Replies

• 

  yogi.bharadwaj

  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
  
  thinhnghiem | Flickr
  
  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.
• 

  Thinh Nghiem

  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)