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 exchange. 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 [Moderator Note: Threads Merged since they are the same topic, there doesn't need to be two threads - Stryder]
Messing round with things like this on phone lines may be illegal. So you should be careful what your doing if your going down that road. Just a heads up, you may think its ok, but you can be sure in some places its illegal to mess round like that. I am just telling you just in case you did not know.
the purpose of the DSL splitter is to filter the internet component from your phone. reversing the output connections will do nothing more than degrade YOUR phone service. it will not allow you to obtain illegal or free services. i used to have DSL and the filters are required on each of your phones to reduce interference. for some reason i couldn't get DSL if i had a phone based alarm. even if voice somehow triggered the FAX it couldn't do anything because you would have to transmit the control codes AND the item to be faxed.
Interesting experiment with ADSL splitter - 2 View attachment 6718 I have been considering what happens if I make the feedback from out put to input of a ADSL splitter, as well as change input to output and vice versa Below are my steps: - Take the first splitter, plug the phone line to the Net output (NOT the input) of it - Plug the input of the first splitter to the input of the second splitter - Plug the Phone output of the second splitter to the phone output of the first one - Plug the Net output of the second splitter to Modem, and connect to laptop See diagram in my attached screenshot Here I made some abnormal things: - Telephone signal transmits into the output, not the input of the splitter The output of second splitter is connected back to the first one Surprisingly, my laptop can access internet normally. Nothing wrong happens Why my extraordinary actions do not affect the operation of the splitters?
You should really look at the Wikipedia page. play close attention to the diagram of the Frequencies used on ADSL. 0-4kHz = Phone 25.875kHz -138kHz = Upstream Data (Out) 138kHz - 1104kHz = Downstream Data (In) You usually have two components a Splitter (That split's the phone connection to POTS rather than placing it into the Data stream) and a Filter that keeps the phone in the correct frequency range. You should perhaps have a look at a Splitter wiring diagram to understand how it works as a connector and what happens when you use it inversely. I'm pretty sure the Data input bridges to the Voice (POTS) connection, however that's as far as my knowledge goes. (a bit silly since I'm neighbours with a small telecom's firm)
View attachment 6759 I have improve the second experiment into the third one As you see in my attached screenshot, this time I cut into the cable and connect the wire inside, green to green, and red to red. So, this is real looping. In a), I loop the net output back to input, and connect the phone output to a telephone machine, and no signal at all In b), I loop the phone output back to input, and connect the net output to a modem. This time I can access internet normally
