Interesting experiments with ADSL splitter

[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

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

b) I loop the phone output to input, and connect net output to a modem, this time I can access internet normally

Could anybody tell me how to attach screenshot, so that I can show my schema here

[nicholasdark]

I must admit, I'm not sure what you are trying to achieve? Other than possibly experimenting lol.

I can't help you with the image upload, but I do know that ADSL splitters contain a low pass filter on the phone not. It's not just a simple wire split. So I'm not surprised that you experience unusual effects from swapping the ports over, cutting wires etc.

This might help: http://www.epanorama.net/documents/tele ... ilter.html

Kind regards
Nick

[thinhnghiem]

My schema for second experiment can be found in

http://www.flickr.com/photos/80780504@N07/

[thinhnghiem]

I must admit, I'm not sure what you are trying to achieve? Other than possibly experimenting lol.

I can't help you with the image upload, but I do know that ADSL splitters contain a low pass filter on the phone not. It's not just a simple wire split. So I'm not surprised that you experience unusual effects from swapping the ports over, cutting wires etc.

This might help: http://www.epanorama.net/documents/tele ... ilter.html

Kind regards
Nick

Actually I did these experiments at first just by curiosity

My posting of these experiments to forums is to get explanation of the result, are they leading to any new orientation of research?

[thinhnghiem]

Previously, I have done some experiments with the ADSL splitter.

I have been going ahead with more experiments, now I would like to post all of them here, including the old and the new ones.

Their schema can be found in

http://www.flickr.com/photos/80780504@N07/12291127016/

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