ETS 300358:1995-09

Integrated Services Digital Network (ISDN) - Completion of Calls to Busy Subscriber (CCBS) supplementary service - Functional capabilities and information flows

German title: ISDN - Dienstmerkmal "Rückruf bei Besetzt" - Funktionsverteilung und Informationsaustausch (CCBS)
Publication date: 1995-09
Original language: English
Pages: 64

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