Well it does travel along upto 4 kilometers of copper ewire before it gets to the pc so another few metres wont make any difference. One thing though, you do need decent cable from socket to pc. So long as the extention socket is fitted onto decent sized cable then I don't see a problem.
I don't trust AOL one iota and wouldn't have their software within a mile of my pc.
pj123 That depends on the installation setup. I have only one filter that sorts all. The line comes into the house direct to a dedicated box that has both adsl conection and phone conection. Main phone and extention phone come from that box as does my adsl line, I gave away the filters that came with the modem.
The setup does need an engineer install but is well worth it as everything is neat and tidy and you know everything works before the engineer leaves. A case of one box does all.
However I still disagree with what the AOL engineer stated about a 10 metre cable being the maximum as mine is 20 ish.
Mine is set up in the bedroom and the extension goes right way around the house,must be 60/70 feet of cable and it work fine,but i do have filters on the boxes,extension and main box,so i dont think it matters how long the cable is.