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From: davet@tsdiag.ccur.com (Dave Tiller N2KAU)
Newsgroups: sci.electronics
Subject: Re: I listen to cellular traffic on my VCR !
Message-ID: <1496@tsdiag.ccur.com>
Date: 27 Mar 91 17:45:32 GMT
References: <77415@bu.edu.bu.edu> <1840041@hpsad.HP.COM>
Organization: Concurrent Computer Corp. Oceanport NJ
Lines: 16

In article <1840041@hpsad.HP.COM> frankb@hpsad.HP.COM (Frank Ball) writes:
-Cellular radio is what used to be UHF channels 70 thru 81 or 83 (whatever
-it went up to).  These were re-allocated for cellular radio.  
-You can only get 1/2 of the conversation, since they transmit and receive
-on different frequencies.

One can get the whole conversation, so I'm told, by listening to the 
output of the cell site, not the mobile phone itself. The mobile phone
and cell site transmit in two different bands, affording full duplex.
The cell site 'repeats' what it hears from the mobile phone, along with
the incoming phoneline audio.
-- 
David E. Tiller         davet@tsdiag.ccur.com  | Concurrent Computer Corp.
FAX:  201-870-5952      Ph: (201) 870-4119 (w) | 2 Crescent Place, M/S 117
UUCP: ucbvax!rutgers!petsd!tsdiag!davet        | Oceanport NJ, 07757
ICBM: 40 16' 52" N      73 59' 00" W           | N2KAU @ NN2Z