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From: jgpo@iham1.UUCP (John, KA9MNK)
Newsgroups: net.ham-radio
Subject: Re: Cellular phones and confidentiality
Message-ID: <372@iham1.UUCP>
Date: Thu, 13-Jun-85 13:33:22 EDT
Article-I.D.: iham1.372
Posted: Thu Jun 13 13:33:22 1985
Date-Received: Fri, 14-Jun-85 04:45:37 EDT
References: <17783@mgweed.UUCP>
Organization: AT&T Bell Laboratories
Lines: 19

> 
> One correction to that article on cellular is that you can hear both sides
> of the conversation on one frequency. There is sidetone in the system and
> if you monitor the cell xmit frequency, you will hear both sides.
> 
> Bob K9EUI

Actually, the sidetone is generated in the mobile unit.  You might be able
to hear the mobile-originated side of the conversation by listening in on
the cell site, but that would be due to crosstalk in the switch and would
probably be at least 10 dB down.


				John Opalko
				Autoplex (TM) 1000 Development Group
				(the cellular people)
				AT&T Bell Labs
				Naperville, IL
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