On 21-Aug-2007,
(E-Mail Removed) wrote:
> If I connect directly to the master socket - and importantly
> disconnect the extension - I get 480k. Otherwise, I get ~30k at
> extension 2 and ~80k at extension 1. Throughout voice has been
> fine.
> Is there something I am missing??
Yours is not an ideal configuration. Best seems to be an ADSL
filter at the master socket, where the incoming line terminates
at the BT provided termination unit. Then the phone extensions
run from the phone socket, and a separate line goes to the
ADSL socket. The ADSL socket can be a BT style one with
a BT plug to RJ11 lead to feed the modem/router.
I use a short RJ11 to BT plug which plugs into a BT style
slave box adjacent to the incoming BT box. At the modem
end another BT slave (no capacitor) box, and a BT plug to
RJ11 lead.
That way any impedance changes on the phone side should
be fairly isolated from the ADSL side by the ADSL filter. With
nothing in shunt, only a direct electrical connection from the
filters ADSL RJ11 to the modems RJ11.
A note on wiring if needs be you can use one wire as a draw
wire for two more, one for phones, one for ADSL, thus keeping
the circuits separate. For the ADSL use twisted pair such
as CAT5. Less satisfactory is phones and ADSL in the same
cable on separate pairs.