Does ADSL use extra wires in the phone line, or does it use just the ormal ones?
The phone wires used by ADSL are exactly the same (two) wires used by your normal telephone handset. You do need to install a line filter. This filter (they also come in ‘central filter’ and ‘central splitter’ versions and we highly recommend you get one of these installed) separates the audio signals used by your phone (or fax, or modem, or answering machine) from the high frequency digital signals that ADSL uses. You need to ensure that every device in your home or office which shares the line with the ADSL device has a line filter fitted to it.
