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Interesting Experiments with ADSL Splitter

12/17/2013 4:19 AM

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 seen in my attached screenshot


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

Is it working correctly?

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#1

Re: Interesting experiments with ADSL splitter

12/17/2013 4:27 AM

"Is it working correctly" No. To work correctly, connect input to incoming 'phone line (wall outlet), telephone to "'phone" output and modem/router to "internet" output, and don't bugger around with the wires.

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#2
In reply to #1

Re: Interesting experiments with ADSL splitter

12/17/2013 8:55 AM

Reminds me of a student I had in an 'Intro to Personal Computers & DOS' class I once taught, who said, "I like to pick files at random and delete them to see what happens. After a while my computer gives me errors and doesn't work any more. What should I do?" After the proverbial facepalm, all there was to say was, "Then STOP deleting files for no reason!"

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#7
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Re: Interesting experiments with ADSL splitter

12/17/2013 12:36 PM

Sorry I made you misunderstand my idea

When I said 'Is it working correctly', what I mean is that if the results of 2 experiments a and b is having anything abnormal or not, or it works as expected. Especially in a), why couldn't I heard the telephone tone

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#10
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Re: Interesting experiments with ADSL splitter

12/17/2013 1:16 PM

Er, because it has been buggered around with, perhaps?

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#3

Re: Interesting Experiments with ADSL Splitter

12/17/2013 9:18 AM

Stay away from anything that has higher voltage than a phone line.

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#4

Re: Interesting Experiments with ADSL Splitter

12/17/2013 10:58 AM

and after he gets done he eats a full bowl of Crunchy Cheetos (tm)

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#5

Re: Interesting Experiments with ADSL Splitter

12/17/2013 11:10 AM

If you hook up like b insinuates and you have internet connectivity, then you have achieved Internet over-unity...a network connection where one does not exist.

I, however, am perfectly satisfied with my Motorola* Surfboard Quantum ∞. My internet connection is always on, has always been on, and will always be on.

* I have no pecuniary interests in the Motorola Corporation or its agents

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#8
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Re: Interesting Experiments with ADSL Splitter

12/17/2013 12:38 PM

Yes, I really can access internet signal in b)

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#22
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Re: Interesting Experiments with ADSL Splitter

12/18/2013 10:30 AM

My smart-ass response was supposed to evoke the fact that you show no connection to any network...what...so...ever...

How, pray-tell, is the computer connected to the internet?

This isn't f@cking twenty questions.

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#23
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Re: Interesting Experiments with ADSL Splitter

12/22/2013 1:09 PM

How, pray-tell, is the computer connected to the internet?

It is connected through the wifi modem

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#6

Re: Interesting Experiments with ADSL Splitter

12/17/2013 11:43 AM

Have you tried this using 120V wall input?

Let us know how that works out for you.

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#11
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Re: Interesting Experiments with ADSL Splitter

12/17/2013 1:17 PM

How about 240VAC 50Hz after that, assuming survival and no fire?

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#13
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Re: Interesting Experiments with ADSL Splitter

12/17/2013 1:29 PM

Sounds good to me.

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#9

Re: Interesting Experiments with ADSL Splitter

12/17/2013 1:03 PM

No magic, the splitter has a high frequency cutoff filter that blocks anything over 3kHz from reaching the phone, everything gets passed to the net side.

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#12

Re: Interesting Experiments with ADSL Splitter

12/17/2013 1:20 PM

Given that these things "just work"

, why bugger around with them in the first place?

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#14

Re: Interesting Experiments with ADSL Splitter

12/17/2013 5:00 PM

Go on, little fella, I applaud your curiosity, while others of your age would be stealing dad's adult DVD collection or doing God knows what when home alone.

Just read up a little on telephony, data transmission lines and modems. And clean your Cheeto's mess when you're done.

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#15

Re: Interesting Experiments with ADSL Splitter

12/17/2013 8:29 PM

Interesting testing. Do you have to pay for the phone calls once it is connected the other way around? Free Internet?

Would be a crack of a thing and the thread should be deleted by Admin immediately!

Have fun!

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#16
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Re: Interesting Experiments with ADSL Splitter

12/17/2013 11:37 PM

The bill for phone and internet is paid monthly

Of course, it's the fee for experiment. But my expectation is the explanation for their results:

Why did I receive busy tone from fax machine in the first experiment

Is there any problem when I made the looping by cutting inside the wire like this. And in a), why didn't I heard the phone tone?

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#17
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Re: Interesting Experiments with ADSL Splitter

12/18/2013 6:16 AM

There's a possibility that the fax number you called was busy.

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#24
In reply to #17

Re: Interesting Experiments with ADSL Splitter

12/22/2013 1:13 PM

No,

In the first experiment, when I connect normally (Phone to phone, net to net), I heard the fax tone.

But when I swap the connection (phone to net, net to phone - as described in my post), the busy tone was heard.

This was replicated many times before I posted my article

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#18

Re: Interesting Experiments with ADSL Splitter

12/18/2013 8:58 AM

In the ADSL, the reason why your experiment with the phone splitter failed is because the Ring and Tip connections for the telephone lines are actually being reversed with respect to the internet modem line. This is done for them to work together using the regular twisted pair setup!! The telephone company normally will provide what they make you believe as a filter, but in reality they are just interchanging the connections inside the tiny module. If you have a telephone line tester available, all you need to do is plug it into each phone line, before and after this so called line filter..

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#19
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Re: Interesting Experiments with ADSL Splitter

12/18/2013 9:16 AM

Maybe sometimes, but definitely not always (and I suspect never in the UK):

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#20
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Re: Interesting Experiments with ADSL Splitter

12/18/2013 9:34 AM

I am referring to how AT&T wired my house 3 years ago when I have my ADSL services as provided by them here in U.S.

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#21

Re: Interesting Experiments with ADSL Splitter

12/18/2013 10:15 AM


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