Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)

LOOK UP ANOTHER TERM


UNII

See U-NII.



U-NII

(1) (UNique Ingredient Identifier) See healthcare IT.

(2) (Unlicensed-National Information Infrastructure) A part of the national spectrum sanctioned by the FCC in 1997 that does not require a license for short-range wireless use. One of the purposes for U-NII was to enable schools, libraries and healthcare organizations in rural areas to more easily connect to the Internet and private, high-speed networks.

Radar Has Priority
U-NII channels 52 through 140 (5.26-5.7 GHz) require transmitting devices to use dynamic frequency selection (DFS) to avoid conflicts with radar pulses. A DFS frequency must be clear of radar for one minute before using it, and if radar is detected on the current channel, the transmitter must switch to another channel, also free of radar for one minute. See ISM band and WiSA.


 U-NNI BANDS

               Indoor/  Max
 Frequency     Outdoor  Power
 Range (GHz)   Usage    (mW)  DFS?

 5.150-5.250   In       50    no

 5.250-5.350   In/Out  250    yes

 5.470-5.725   In/Out  250    yes

 5.725-5.825   Out    1000    no





Personal Use Only

Before/After Your Search Term
BeforeAfter
unified display interfaceUnimodem
unified messaginguninstall
Unified Modeling Languageuninstaller
unified storageUninterruptible Application Error
unified threat managementuninterruptible power supply
Uniform Resource Locatorunion
UniForumuniprocessor
UNIFY 2000unique visitors
Unify NXJunique visits
Unify VISIONUniSQL

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
Audio/VideoGraphics
MainframesSecurity
ProgrammingHealthcare IT
System design