Questions about cordless phones

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Article #9179

#9179

From: Eric Olson
Date: Sat, 29 Dec 1990 16:43

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I've got a few simple questions about cordless phones:

1.  About 5 years ago, they started selling "new freqency" phones.
    What was new, compared to the old phones?

2.  What frequencies are used by modern ("new frequency") phones?
    AM or FM?  Sidebands?  Are they all exactly the same frequency,
    or do some have different or multiple frequencies?

3.  My roommate has an AT&T cordless phone with 3 "channels".  I
    guessed that they were upper SB, lower SB, and main band.  He
    claimed they were separate frequencies.  What's the scoop?

4.  (Not really a question)  I know there are security codes sent
    between base & handset, my questions don't pertain to those.

Thanks for any info you might have!

Cheers!  Happy New Year!

-Eric

-- 
Eric K. Olson, Editor, Prepare()       NOTE: olson@bootsie.uucp will not work!
Lexington Software Design              Internet: olson@endor.harvard.edu
72A Lowell St., Lexington, MA 02173    Usenet:   harvard!endor!olson
(617) 863-9624                         Bitnet:   OLSON@HARVARD

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!snorkelwacker.mit.edu!bloom-beacon!vaxeline!bootsie!olson
From: olson@bootsie.UUCP (Eric Olson)
Newsgroups: sci.electronics
Subject: Questions about cordless phones
Message-ID: <52@bootsie.UUCP>
Date: 29 Dec 90 16:43:37 GMT
Reply-To: olson@endor.harvard.edu (Eric Olson)
Organization: Lexington Software Design, Lexington, MA
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