From: then@snakemail.hut.fi (Tomi  H Engdahl)
Subject: Re: Telephone on hook/off hok ok circuit ~
Organization: Helsinki University of Technology, Finland
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In-reply-to: petert@zikzak.apana.org.au's message of 7 Apr 1993 05:26:18 GMT

In article <1ptolq$p7e@werple.apana.org.au> petert@zikzak.apana.org.au (Peter T.) writes:

>Since an on-hook line is aprox 48-50V, and off-hook it usually drops below 10V.
>How about an LED in series with a zener say around 30V.
>On-hook = LED on
>Off-hook = LED off.
>Would this work? If anyone tries/tried it, please let me know.

Not recommended. Your circuit would take too much current, when
telephone is on-hook. Telephone company does not like it.


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