Glossary:

ATIS Telecom Glossary

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Description

IF

Abbreviation for intermediate frequency.

IF1 (interface 1)

An interface suitable for star concentration. [T1.201-1987] [T1.204-1988]

IF2 (interface 2)

An interface suitable for communication between a network element (NE) location and operations systems (OSs) over packet switched networks, dedicated lines, or circuit switched connections. [T1.201-1987] [T1.204-1988]

IF4 (interface 4)

An interface suitable for multipoint concentration by polling. [T1.201-1987] [T1.204-1988]

IF6 (interface 6)

An interface between a network element (NE) to one or more network elements (NEs) in other locations using star configuration embedded operations channel (EOCs) or conventional communications services. [T1.204-1992]

IFF

Abbreviation for identification, friend or foe.

IFRB

Abbreviation for International Frequency Registration Board.

IFS

Abbreviation for ionospheric forward scatter. See ionospheric scatter.

IGD

Internet Gateway Device

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