NA 022
DKE German Commission for Electrical, Electronic & Information Technologies of DIN and VDE
Standards
[CURRENT]
DIN ETS 300056/A1
DIN ETS 300056/A1
Integrated Services Digital Network (ISDN) - Call Waiting (CW) supplementary service - Service description; English version ETS 300056:1991/A1:1996
Title (German)
ISDN - Dienstmerkmal Anklopfen - Dienstbeschreibung; Englische Fassung ETS 300056:1991/A1:1996