The wiring may be 30 years old. However it seems to have been bodged because four extensions are connected to the incoming BT wires all within a JB just inside the house.[/i]
BUT 4 extensions can also attenuate higher frequency components in the ADSL particularly if 4 extensions implies big rooms = " long extensions" .
There isn't a master socket anywhere! Turns out what I thought was a master socket is just an extension socket.
As there is no master socket, I believe I need to correct this wiring. Is this true?[/i]
It would be useful to know exactly what the wiring is, which suggests replace it with a normal set up ! I would avoid the Mk2 filtered faceplate (includes an RF3) for the moment, as there are indications of a manufacturing bug. Mk1 is OK.
Either can be set up with a "microfilter" inside the master socket so you have phone only extensions and one central modem socket. This avoids damage to dangly microfilters from pets/children/vacuum cleaners, and prevents the effect of N extensions.
I think it could be wired for N phone extensions with 1 modem extensions.
The acid test is how well do your speed, S/N and attenuation compare with an estimate based on the distance from exchange*1.4 ( to allow for not taking the direct route). see:=
http://www.broadbandspeedchecker.co.uk/guides/adsl_and_distance.aspxPostcode estimates can be conservative to put it mildly !