Looks like it but:-

a) You may want to add the parallel resistor (180, 220 etc) connected
in by the relay in order to use a smaller transformer & not have to
worry about the magnetising effect of the DC current.

b) if there is likely to be a connection to an ADSL enabled line, you
could add a low-pass filter at the input & save on an external filter.

RP

On 19/11/2007, Jinx <joecolquitt@clear.net.nz> wrote:
> > DC blocking capacitor
>
> Richard/John, thanks
>
> So -
>
> Series DC-blocking cap (I see values 0.47u - 1u used) with a
> relay pole to short that on connection, the impedance of the Tx
> signalling off-hook to the exchange
>
>
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist