Technology Notes from Kintronics
Providing Information Technology Since 1977 ---- Contact us: 1-800-431-1658 or 914-944-3425 or by email infohome at kintronics.com

Thursday, February 2, 2012 Issue 59   VOLUME 11 ISSUE 59  
In this issue...
How Surge Protectors Work
Door Access Control Review
And now the Jokes

How Surge Protectors Work
Ligtning's Thief
http://www.kintronics.com/neteye/neteye.html
by Virginia Fair


Once upon a time a major university installed IP cameras throughout its campus in reaction to a wave of violence perpetrated against female students. All went well until a passing thunderstorm brought a lightning strike which just happened to hit an IP camera mounted on the parapet of a dorm. Of course the camera was destroyed, but have you ever heard the phrase “greased lightning”? It’s a very descriptive term for within seconds, the surge created by the lightning traveled through the network destroying both the server and the switch, creating havoc right down to the network cards in students’ laptops at the end of the cable runs.


[FULL STORY]
 
Door Access Control Review
Comparision of Costs
http://www.kintronics.com/IPaccesscontrolsystems.h...
by Bob Mesnik

Door access control systems have been around for many years. The early units used centralized control panels with simple card readers at the doors. To install these systems the readers were wired to a controller and then back to a central control panel. They also required power to be wired to each of the locks usually from a separate control panel.

Over the years more intelligent devices were developed, and now most of the intelligence is located at the reader near the door. The latest IP door readers make use of the Ethernet PoE network and are very easy to install. This article reviews the pros and cons of both systems and compares the cost of installation.

[FULL STORY]
 
And now the Jokes
I know you have been waiting for these

A philosophical question for today:

[FULL STORY]
 
ARCHIVE
Issue 58
December 14, 2011
Vol. 10 Issue 58
Issue 57
October 3, 2011
Vol. 10 Issue 57
Issue 56
May 3, 2011
Vol. 10 Issue 56
Issue 55
February 9, 2011
Vol. 10 Issue 55
Issue 54
October 6, 2010
Vol. 9 Issue 54

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Published by Bob Mesnik
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For more information, please contact us 1-800-431-1658 or 914-944-3425 (outside the USA) or by email infohome at kintronics.com
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