ETS 300057:1992-05

Integrated Services Digital Network (ISDN); Call Waiting (CW) supplementary service; functional capabilities and information flows

German title: Diensteintegrierendes digitales Fernmeldenetz (ISDN); Anklopf- (CW-) Zusatzdienst; Funktionelle Möglichkeiten und Informationsflüsse
Publication date: 1992-05
Original language: English
Pages: 23

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