On Thu, 10 Sep 1998, David VanHorn wrote:

> >Add a 12 V battery or wall wart in series with the 2 modems and issue ATO
> >and ATA respectively at each end. Ring won't work.
>
> Limit the battery current to <=100mA with a light bulb or some such, and
> toss a large-ish electrolytic across that mess to keep the AC impedance
> down. I made boxes like that for our products using three 9V batteries.

Ahh, the ASCII art schematic that I have posted on USENET months ago uses
a bulb too, and a cap ;) Small world I guess.

Anyway I've noticed that the 'leased line' option is missing from most
off-the-shelf modems.

Peter