Remote Beepers info needed
>What I'd like to do is set up a
>computer to automatically answer a phone and if it hears a remote beeper
>(like those telephone answering machine beepers),perform some preset
>actions. The things I need to know are:
>1. Would it be possible to use an existing answering machine to do the job.
>2. What frequencies do those beepers operate at (just a general idea).
Not sure, but they're easy to imitate. Security can be a problem.
>3. Has anyone already tried it?
I haven't personally, but I have heard of people hooking up touch-tone decoder
chips and having the computer respond to a "secret code." This would reduce
or eliminate the security problem because the code can be as many digits as
needed. Two other advantages: no beeper required, multiple codes for multiple
actions. Two disadvantages: rotary phones (requiring a handheld touch-tone
"beeper"), forgetting the code. Radio Shack has a touch-tone decoder chip that
would probably work.
Bill McFadden Tektronix, Inc. P.O. Box 500 MS 58-639 Beaverton, OR 97077
GTE: (503) 627-6920 "The biggest difference between developing a missle
component and a toy is the 'cost constraint.'" -- John Anderson, Engineer, TI