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The Unlicensed National Information Infrastructure radio band is part of the radio spectrum used by IEEE-802.11a devices and by many wireless ISPs. It operates over three ranges:

UNII 1: 5.15-5.25 GHz. Sometimes referred to as UNII Indoor. Regulations require use of an integrated antenna.
UNII 2: 5.25-5.35 GHz. Sometimes referred to as UNII Low. Regulations allow for a user-installable antenna.
UNII 3: 5.725 to 5.825 GHz. Sometimes referred to as UNII / ISM. Regulations allow for a user-installable antenna.

Wireless ISPs generally uses 5.15-5.25 GHz and 5.725-5.825.

UNII is an FCC regulatory domain for 5-GHz wireless devices.

UNII power limits are defined by the United States 47 CFR 15.407 regulations. Individual countries' use of the bands designated in these sections may differ due to variations in national radio regulations.

The European HiperLAN standard operates in the UNII band.

External links

In the USA, CFR Title 47 Part 15 (revised in 2004) describes the regulation of the U-NII bands.

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-The '''Unlicensed National Information Infrastructure''' [[radio band]] is part of the radio spectrum used by [[802.11a|IEEE-802.11a]] devices and by many wireless ISPs. It operates over two ranges:
+The '''Unlicensed National Information Infrastructure''' [[radio band]] is part of the radio spectrum used by [[802.11a|IEEE-802.11a]] devices and by many wireless ISPs. It operates over three ranges:
+*UNII 1: 5.15-5.25 GHz. Sometimes referred to as ''UNII Indoor''. Regulations require use of an integrated antenna.
-*U-NII Indoor: 5.15-5.35 GHz
+*UNII 2: 5.25-5.35 GHz. Sometimes referred to as ''UNII Low''. Regulations allow for a user-installable antenna.
-*U-NII Low: 5.725-5.825 GHz
+*UNII 3: 5.725 to 5.825 GHz. Sometimes referred to as ''UNII / ISM''. Regulations allow for a user-installable antenna.
+Wireless ISPs generally uses 5.15-5.25 GHz and 5.725-5.825.
-U-NII is an [[Federal_Communications_Commission|FCC]] regulatory domain for 5-GHz wireless devices.
+UNII is an [[Federal_Communications_Commission|FCC]] regulatory domain for 5-GHz wireless devices.
-U-NII power limits are defined by the United States 47 [[Code_of_Federal_Regulations|CFR]] 15.407 regulations. Individual countries' use of the bands designated in these sections may differ due to variations in national radio regulations.
+UNII power limits are defined by the United States 47 [[Code_of_Federal_Regulations|CFR]] 15.407 regulations. Individual countries' use of the bands designated in these sections may differ due to variations in national radio regulations.
-The European [[HIPERLAN|HiperLAN]] standard operates in the U-NII band.
+The European [[HIPERLAN|HiperLAN]] standard operates in the UNII band.
 ==External links==