AVR-Chat

At 08:49 AM 2/1/2005, Stefan Trethan wrote:

>On Tue, 01 Feb 2005 08:19:19 -0500, Dave VanHorn <dvanhorn@dvanhorn.org>
>wrote:
>
> >
> >> 
> <http://www.ee.washington.edu/circuit_archive/circuits/F_ASCII_Schem_Tel.html>
> > Plenty of sort-of-working schematics there.
>
>
>Well, i only mentioned it because i built the phone in use indicator,
>which worked ok.
>I guess it depends on the location if a "sort of" well designed circuit
>works or not (because the operating parameters of the line might differ).

I see a lot of that, especially with telco designs.
Telephone systems work on current, not voltage, and depend on keeping the 
line balanced, and properly impedance matched.
There are limits to how much current you can draw, and when, and what sort 
of levels you can send and receive.


>Thanks for the SLIC definition.

POTS is an acronym for "Plain Old Telephone Service", it's official. :)



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