Integrated Services Digital Network (ISDN); 3,1 kHz telephony teleservice; attachment requirements for handset terminals
German title
ISDN; Teledienst Telefonie mit 3,1 kHz; Anschlußbedingungen für Handapparate
Publication date
1990-12
Original language
English
Pages
56
Publication date
1990-12
Original language
English
Pages
56
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