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Description
ITU Recommendations (sometimes called ITU-T Standards) define specifications for telecommunications technologies.
Published
ITU-[Sector] [Series].[Number]With year
ITU-[Sector] [Series].[Number]-[Year]Examples 4
ITU-R 01-201
ITU-T G.992.1
ITU-R SA.1014-4
ITU-T E.164
Components Used
ITU Recommendation identifiers are composed of these elements:
Sector
EnumerationITU sector: R (Radiocommunication), T (Standardization), D (Development)
R (Radiocommunication)T (Standardization)D (Development)
Required. After hyphen following ITU.
e.g.
:sectorTSeries
EnumerationThe series letter (e.g., G, E, H, SA)
GEHIJLMN +9 more
Required. Follows sector, separated by dot.
e.g.
:seriesGNumber
StringThe recommendation number
Series-specific. Often includes dot-separated sub-numbers.
e.g.
992.1Year
YearPublication year
Optional. Preceded by hyphen.
e.g.
2019Algebraic Relations
Relations that can involve Recommendation identifiers:
| Relation | Description | Syntax | Example |
|---|---|---|---|
| Amendment | Modifies a Recommendation | ITU-[Sector] [Series].[Number]/Amd [N] | ITU-T G.992.1/Amd 1 |
| Corrigendum | Corrects errors | ITU-[Sector] [Series].[Number]/Cor [N] | ITU-T G.992.1/Cor 1 |
| Supplement | Additional content | ITU-[Sector] [Series].[Number] Suppl [N] | ITU-T G.992.1 Suppl 1 |