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Unit 11: Wireless WAN

text message that contains the second page of the search result for the term “SMS text messaging” Notes
back to your mobile phone.
Many other two-way interactive text messaging applications can be built using a similar way. For
example, a company may want to build an SMS messaging application to enable its employees to
query the corporate database while they are working outdoors.

Task Critically examine the types of user devices are most common with wireless WANs.

Self-Assessment

Fill in the blanks:

11. SMS stands for Small Message Service. False
12. The GSM and SMS standards were originally developed by ETSI. True
13. SMS messages can carry binary data. True
14. A mobile phone is a device that is carried by its owner most of the time. True

15. SMS is a not suitable technology for delivering alerts and notifications. False



Case Study A Case Study in High-Speed Wireless WAN

ncreasingly, county governments need systems that allow all branches of public service
– from courthouses and police stations to public schools and emergency services –
Ito share information quickly and efficiently. This is particularly important for rural
counties, which have historically been extremely decentralized. With the help of Motorola’s
wireless solutions, Orange County, Virginia is on its way to providing services to all its
businesses and residents.
Orange County

Located 55 miles southwest of Washington, D.C. and 72 miles northwest of Richmond,
Virginia, historical Orange County is a rural community with rolling landscapes and
spectacular views of the Blue Ridge Mountains. Founded in 1734, the County’s diversified
economy and location make it ideal for business and industry, and its nearly 354 square
miles are home to more than 32,000 residents.

Advanced Network Systems
Advanced Network Systems, Inc., headquartered in Charlottesville, Virginia, was selected
to provide design and implementation services for the county-wide project. The Company
specializes in advanced wireless WANcommunication technologies and was responsible
for furnishing all systems consulting, engineering, procurement, deployment, systems
support and maintenance services.
Situation and Challenge
Faced with performance limitations and infrastructure inefficiencies, multiple Orange
County government agencies collaborated to create a high-speed wireless network that
would provide a county-wide Local Area Network (LAN), a Wide Area Network (WAN)
Contd...

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