V.21 (Q3552865)
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ITU-T recommendation
Language | Label | Description | Also known as |
---|---|---|---|
English | V.21 |
ITU-T recommendation |
Statements
Identifiers
V.21
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Sitelinks
Wikipedia(3 entries)
- enwiki ITU-T V.21
- frwiki V.21
- plwiki V.21