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The Telecom Digest for December 29, 2012
Volume 31 : Issue 303 : "text" Format
Messages in this Issue:
The End of the Public Phone Network (Colin)
Anatomy of a typical telephone conversation (Thad Floryan)

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

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Date: Fri, 28 Dec 2012 04:46:58 +0000 (UTC) From: Colin <colin_sutton@ieee.org> To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org. Subject: The End of the Public Phone Network Message-ID: <kbj882$49j$1@adenine.netfront.net> The End of the Public Phone Network More and more businesses and households are trading their traditional switched telephone service for voice over Internet Protocol, or VoIP, services. That's led to a paradoxical situation, where a huge number of phone calls start out as Internet packets and end up as Internet packets, but have to be switched to, and then from, a voice circuit on the old-school public switched telephone network. Universal Internet Protocol would allow telecom companies to meet the same demand with much less equipment. Seeing the possible financial benefits - including turning suddenly redundant real estate into cash - AT&T, the largest phone service provider in the world, called on the U.S. government to set a final date for the last plain old telephone call. "Techwise Conversations" host Steven Cherry talks with Daniel Berninger, founder of the Voice Communication Exchange Committee. This Washington, D.C.-based telecom advisory group has chosen the date for the completion of the transition to the Internet Protocol. http://spectrum.ieee.org/podcast/telecom/internet/the-end-of-the-public-phone-network -- Colin --- news://freenews.netfront.net/ - complaints: news@netfront.net ---
Date: Thu, 27 Dec 2012 23:29:14 -0800 From: Thad Floryan <thad@thadlabs.com> To: telecomdigestmoderator.remove-this@and-this-too.telecom-digest.org. Subject: Anatomy of a typical telephone conversation Message-ID: <50DD4A4A.2080209@thadlabs.com> AbstruseGoose and XKCD are weekly technical and often humorous websites. Today's AbstruseGoose entry is a fascinating diagram of the mechanics and physics of a telephone conversation. The following PNG is l-o-n-g at 558x5101=719kB and it displays fine with every browser on every system I have which includes *BSD, Linux, Solaris, and Windows (WinXP, Vista, Win7): http://abstrusegoose.com/strips/rube_goldberg.PNG Note the length of the PNG file: 5101 pixels vertically. Most good browsers will display a miniature version of that PNG to fit a browser's screen as if it were a thumbnail. You'll need to hover the mouse cursor over that "thumbnail" and the cursor should change to a magnifying glass with this (+) symbol which means simply to click the "thumbnail" and you'll then see the full-size PNG image -- works fine with Firefox, IE and Safari. If your browser doesn't permit magnifying the "thumbnail" then uninstall that browser and install and use Firefox, IE or Safari.
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