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ITU-T Q.721

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ITU-T Q.721

Functional description of the signalling system no. 7 telephone user part (TUP)

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Author ITU
Editor ITU
Document type Standard
Format File
ICS 33.040.40 : Data communication networks
Number of pages 2
Year 1980
Document history
Country Switzerland
Keyword CCITT Q.721;ITU-T 721;721