Remote Beepers info needed 
Author Message
 Remote Beepers info needed

I'm looking for some technical info for a project I'm working on (or
thinking about working on anyway). 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).
3. Has anyone already tried it?


Thu, 17 Dec 1992 04:05:00 GMT
 Remote Beepers info needed

Quote:

>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.

Sounds reasonable.

Quote:
>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.

Quote:
>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


Thu, 17 Dec 1992 19:56:00 GMT
 
 [ 2 post ] 

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