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Filing date
Publication date
Application filedfiledCritical
Publication of BE712540ApublicationCriticalpatent/BE712540A/xx
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L12/00—Data switching networks
H04L12/02—Details
H04L12/06—Answer-back mechanisms or circuits
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
H04L17/02—Apparatus or circuits at the transmitting end
H04L17/04—Apparatus or circuits at the transmitting end with keyboard co-operating with code-bars