Yes, the circuit and explanation is shown @
http://209.1.238.246/1st_pages/A1208.htm

The chip is a max638 and it looks like 50 ma @ 5v regulated can be drawn
from the line when the phone is not in use.

Regards,

Art




At 06:47 PM 09/10/1999 +0200, you wrote:
>Art,
>
>I visited the site but had no luck in finding the part.
>
>Do you have the chip number at hand ?
>
>Thank you
>
>Duilio
>
>
>At 10.26 10/09/99 -0400, you wrote:
>>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
>>
>
>