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ETS 300050:1991-10

Integrated Services Digital Network (ISDN); Multiple Subscriber Number (MSN) supplementary service; service description

German title
ISDN; Dienstmerkmal Mehrfachrufnummer; Dienstbeschreibung
Publication date
1991-10
Original language
English
Pages
17
Publication date
1991-10
Original language
English
Pages
17

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