Howard Simpson wrote:
Just to give you an indication of the difference between a faceplte filter and a plug in one. When I first got ADSL I could not get a sync at all using a standard plug in filters! By fitting the face plate to the master socket I now get 2.8M on a line with 57db attenuation. The interference was coming fom all the extension wires in the house, remember ADSL is effectivly a radio signal coming down your phone line. I recently plugged in a 1920 original candlestick phone, would you beliive it the ADSL down speed went up! Probably because the impedance is much lower than a modern phone so is damping the interference from the extention wiring.
I've just looked at my BT main socket. Plugged into the faceplate is my filter, and plugged into my filter is my phone wire (straight to the handset) and ADSL modem wire - thats it. In the house I also have a telephone extension upstairs that has a filter in the socket, but no phone. On the same extension cable is my 'alarm dialler' which is just wired into a connection box without a filter.
I cannot see where this extension from upstairs connects to the BT line because when I pull the main socket faceplate out there are only 2 wires connected. Does this mean my extension is connected into the main socket direct to BT's wire? Is this even allowed? Thanks
