31 Years of the Digest ... founded August 21, 1981

Add this Digest to your personal   or  

The Telecom Digest for May 3, 2013
Volume 32 : Issue 94 : "text" Format
Messages in this Issue:
Re: Why Don't Cell Phones have Dial Tones? (bernieS)

====== 31 years of TELECOM Digest -- Founded August 21, 1981 ======

Telecom and VOIP (Voice over Internet Protocol) Digest for the Internet. All contents here are copyrighted by Bill Horne and the individual writers/correspondents. Articles may be used in other journals or newsgroups, provided the writer's name and the Digest are included in the fair use quote. By using any name or email address included herein for any reason other than responding to an article herein, you agree to pay a hundred dollars to that person, or email address owner.
Addresses herein are not to be added to any mailing list, nor to be sold or given away without the explicit written consent of the owner of that address. Chain letters, viruses, porn, spam, and miscellaneous junk are definitely unwelcome.

We must fight spam for the same reason we fight crime: not because we are naive enough to believe that we will ever stamp it out, but because we do not want the kind of world that results when no one stands against crime.  - Geoffrey Welsh

See the bottom of this issue for subscription and archive details and the name of our lawyer, and other stuff of interest.

Date: Wed, 01 May 2013 00:14:06 -0400 From: bernieS <bernies@netaxs.com> To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org. Subject: Re: Why Don't Cell Phones have Dial Tones? Message-ID: <20130501042057.59134.qmail@leila.iecc.com> In 1986 Western Union introduced a cellular car phone designed for executives, to emulate a familiar office phone (cellular car phones were a new concept then.) It had a landline-style handset and a traditional-looking DTMF pad in the center console. When you took the phone off-hook, and it detected network availability, it played a realistic-sounding dial tone! That phone was manufactured by E.F. Johnson, which at the time was partly owned by Western Union. It's trunk-mounted transceiver had two TNC antenna connections for the Diversity Receiver inside. I never saw another cellphone with that feature, which greatly reduced signal drop-outs by constantly 'voting' on which antenna/receiver had the best signal. Fading at 800 MHz was a common problem. Audio quality was superb full-duplex FM with negligible latency--much better and natural-sounding than today's mobile phones.
TELECOM Digest is an electronic journal devoted mostly to telecom- munications topics. It is circulated anywhere there is email, in addition to Usenet, where it appears as the moderated newsgroup 'comp.dcom.telecom'. TELECOM Digest is a not-for-profit, mostly non-commercial educational service offered to the Internet by Bill Horne. All the contents of the Digest are compilation-copyrighted. You may reprint articles in some other media on an occasional basis, but please attribute my work and that of the original author. The Telecom Digest is moderated by Bill Horne.
Contact information: Bill Horne
Telecom Digest
43 Deerfield Road
Sharon MA 02067-2301
bill at horne dot net
Subscribe: telecom-request@telecom-digest.org?body=subscribe telecom
Unsubscribe: telecom-request@telecom-digest.org?body=unsubscribe telecom
This Digest is the oldest continuing e-journal about telecomm-
unications on the Internet, having been founded in August, 1981 and
published continuously since then.  Our archives are available for
your review/research. We believe we are the oldest e-zine/mailing list
on the internet in any category!

URL information: http://telecom-digest.org

Copyright (C) 2013 TELECOM Digest. All rights reserved.
Our attorney is Bill Levant, of Blue Bell, PA.

Finally, the Digest is funded by gifts from generous readers such as yourself who provide funding in amounts deemed appropriate. Your help is important and appreciated. A suggested donation of fifty dollars per year per reader is considered appropriate. See our address above. Please make at least a single donation to cover the cost of processing your name to the mailing list. All opinions expressed herein are deemed to be those of the author. Any organizations listed are for identification purposes only and messages should not be considered any official expression by the organization.

End of The Telecom Digest (1 message)

Return to Archives ** Older Issues