At 02:58 PM 09/10/1999 +0200, you wrote:
>I'd like to know how much current can be legally drawn from the CO line by a
>line-powered device.
>
>Do you know of any line-powered circuit avaiable in the net ?
>
>Thank you
>
>Duilio Foschi
>
>

Maxim has an ap note on this and a special chip for extracting power.

It's at www.maxim-ic.com

Look for the ap note first and get the chip number from that .pdf document.

Art