I'm suprised that you even got your phone or your broadband to work at all with out one mate.
Why do we need the filter(s) at all?
Basically your telephone line was originally designed to carry "Commercial Speech" between your home and the telephone exchange. This uses a band of frequencies from 300 to 3000 hertz.
ADSL uses frequencies very much higher than this speech band so you now finish up with two different systems on the one line. In order to keep these systems apart and stop them interfering with each other it is necessary to separate the two components from the telephone line in your home. This is where the Filter / Splitter comes in. It is normally a small plastic box with a short lead that plugs into your phone socket and two outputs, one for your ADSL Modem and another for a telephone.
The filters select the band of frequencies for each of the outputs, phone or ADSL, and send just the correct band to the appropriate socket.
Why do we need the filter(s) at all?
Basically your telephone line was originally designed to carry "Commercial Speech" between your home and the telephone exchange. This uses a band of frequencies from 300 to 3000 hertz.
ADSL uses frequencies very much higher than this speech band so you now finish up with two different systems on the one line. In order to keep these systems apart and stop them interfering with each other it is necessary to separate the two components from the telephone line in your home. This is where the Filter / Splitter comes in. It is normally a small plastic box with a short lead that plugs into your phone socket and two outputs, one for your ADSL Modem and another for a telephone.
The filters select the band of frequencies for each of the outputs, phone or ADSL, and send just the correct band to the appropriate socket.
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