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How ADSL works

ADSL is a technology that allows you to use your current phone connection for the transfer of data while still leaving enough bandwidth to let you use your telephone at the same time. In pictures it works something similar to this.

Fig 1

The picture shows the telephone wire inside the cable that connects to your phone. For the sake of the demonstration it has been blown up. What I am referring to is the actual copper wire inside the plastic. This is like a pipe to the data

Fig 2

Now we just blow it up a bit more and you can see what your phone conversation looks like running along the wire.

Now you see how much of the wire or pipe is taken up by the voice signal, not very much. This means that we can send other signals through the same wire and use up the rest of the space.

Fig 3

Now you can see where the ADSL comes in. We have introduced a splitter to split the signal and take one signal to the phone and the other to the PC.

Then we install a modem the change the signal into a format that the PC can understand. That is all there is to it, we are ready to go.