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ITU-T U.21

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ITU-T U.21

Operator recall on a telex call set up on a radiotelegraph circuit

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Author ITU
Editor ITU
Document type Standard
Format File
ICS 33.020 : Telecommunications in general
Number of pages 1
Year 1980
Document history
Country Switzerland
Keyword CCITT U.21;ITU-T 21;21