Hi, Bob,
Thank you for replying.
What I meant to say was that I could connect a capacitor(say 47u/17V)
between
the lines when it is off-hook. The actual location can be after the
switching
circuit inside the telephone set. I just want to know the simplest way
to mute
signals form the line while the DC connection is still active. In my
projet I
have to switch the earphone to monitor another signal.
Best reguards!
> From: Bob Carter <spam_OUTwolftechTakeThisOuT
MIDWEST.NET>
> Subject: Re: How to filter out signals from Telephone lines
> Mime-Version: 1.0
> Content-Type: text/plain; charset="US-ASCII"
>
> A 16V cap across the phone lines?? The DC voltage is roughly 50V, and
an
> AC ring siganl can be over 100 volts. Can you place an approx. 20mA
load
> (to simulate off-hook condition) across your lines and then switch
in/out
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