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CWSP RELEASE DATE 2/08/2010
  • CWSP Certified Wireless Security Professional Official Study Guide: Exam PW0-204
    CWSP Certified Wireless Security Professional Official Study Guide: Exam PW0-204
    by David D. Coleman, David A. Westcott, Bryan E. Harkins, Shawn M. Jackman

    Shawn Jackman (Jack) CWNE#54 is a personal friend and has been a mentor to me for many years.  I've had the pleasure and opportunity to work with Jack for 4 years. Jack is a great teacher who takes complex 802.11 standards and breaks them down so almost anyone can understand the concept at hand. I'm excited for you brother. Great job and job well done! Put another notch in the belt!

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Tuesday
Mar302010

ISM Band Frequency  Refresher

 

 

I worked with a customer recently who was convinced the ISM band was only for 2.4 GHz band. Which is 100% incorrect! Here is a refresher … 

The ISM  (In the ISM Band) stands for "industrial, scientific and medical" radio bands. The ISM includes the following frequencies:

902 - 928 MHz                    (26 MHz in width)

2.400 - 2.4835 GHz           (83.5 MHz in Width)

5.725 - 5.875 GHz              (150 MHz in Width) ** Note 5.8 GHz ONLY**

This ISM bands were defined by the ITU Telecommunication Standardization Sector

http://www.itu.int/ITU-R/terrestrial/faq/index.html#g013

The ISM bands are governed by the FCC here in the United States and they are unlicensed.  This is found under title 47, part 18.

http://www.access.gpo.gov/nara/cfr/waisidx_07/47cfr18_07.html

Although the band is labeled as “industrial, scientific and medical” bands -- you will find almost everything and anything under the sun that is unlicensed in these frequencies. You name it, it rides these waves.  WiFi, cordless phones, Mircowave ovens, Bluetooth, toys, baby monitors, wireless cameras, etc !

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Reader Comments (1)

Thanks for sharing the little 'fresher' on frequencies. I'll send this link to my students.

Keith

March 30, 2010 | Unregistered CommenterKeith Parsons

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