On Fri, 14 Jul 2000 07:56:03 -000, Mike Millen wrote:
> Hi Pete,
> All phone lines, from all parts of the world, including the USA,
> should be treated as fully-floating. In virtually all cases they are,
> although in some cases the DC offset may be small. The AC impedance
> to ground from either leg is very high.
> All modems are designed to maintain the balanced and floating conditions.
> Try touching an earth to one of your phone lines during a conversation
> and see what happens.
> Mike
> (Telephone equipment designer. :)
Hi Mike, thanks for the info.
Now, I wonder, might it help remove noise from the 'phone line to add
a shunt to earth/mains-neutral through a suitable capacitor or inductor?
Sort of an RFI shunt or block as the case may be...or even an 80cycle
to 6kC bandpass?
---- Pete Randolph ----
---- Morristown Corners, Vermont ----
