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ITU-T Q.709:1993-03

Signalling system no. 7 - Hypothetical signalling reference connection

German title
Zeichengabesystem Nr. 7 - Hypothetische Zeichengabebezugsverbindung
Publication date
1993-03
Original language
English
Pages
14
Publication date
1993-03
Original language
English
Pages
14

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