February 19, 2019 Contact Us At (559) 733-1940       Login   

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 Technology with Integrity

By Tim Torian, Torian Group, Inc.


Bluetooth is a standard for connecting devices using wireless radio over very short range – within about 10 meters. It is used for wireless headsets, printers, keyboards, digital cameras, mobile phones and PDA's, and other devices. Each device contains a Bluetooth radio and can negotiate connections with other Bluetooth devices. It has been around for some time, and is now quite reliable. 

It is named after a 10th century Danish king who was successful in uniting warring factions in northern Europe. Development started in 1998.

Bluetooth operates in an unlicensed 2.4 GHz frequency band called ISM which is shared by garage door openers, regular 802.11 wireless networks, and microwave ovens. It hops between frequencies, which helps prevent interference and eavesdropping.  The data transmission is encrypted. A unique key is assigned to each device, so that only devices that are authorized can communicate.  Bluetooth standards assure that devices interoperate successfully. This was a big problem with early Bluetooth devices. A particular Bluetooth device supports one or more “services” – what types of applications the device is capable of.

Applications for Bluetooth fall into 3 main categories: Cable replacement, Peer to Peer networking, and data access. Here are a few applications that you may want to take advantage of:

  • Sync your PDA or phone with your computer automatically when you walk in to the room. 
  • Answer your phone using a wireless headset – some models work with multiple devices, so you can use it with your office phone, your cell phone, and your computer.  This combined with voice recognition for dialing can make driving a lot safer.
  • Have your laptop connect to your printer, wireless keyboard and mouse when you walk in to the office.  This combined with a wireless LAN card can eliminate the need for connecting any cables to your laptop while in the office.  I recommend using Bluetooth rather than infrared or other wireless technologies if you want a wireless keyboard and mouse.  Logitech makes a very nice one that doubles as a Bluetooth hub for your computer.  ( www.logitech.com )
  • Send information from one PDA to another, such as appointments or v-cards (electronic business cards, with your name and contact info).

For more information on Bluetooth, look at these web sites:

Tim Torian has taught computer networking at the College of Sequoias and Cal Poly Extension. He has a BS in Computer Science, and has been consulting on computer networks for the past 20 Years. His industry certifications include: Cisco CCNA and CCNI, Microsoft MCSE, and Novell CNE.  He is president of Torian Group, Inc. which provides a full range of Technology Consulting services to local business, including computer services, networking, and custom software development. They can be reached at (559) 733-1940 or on the web at http://www.toriangroup.com


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