An additional equipment for submission of submission. (Machine-translation by Google Translate, not legally binding)

摘要

An additional equipment for subscriber substation or similar, for the transmission of data through telephone lines characterized in that it comprises pushbuttons (3) acting on audio oscillators and a housing (4) for the microphone (5) of the handle of micro (6) of the telephone substation, as well as a switching device that is operated by the insertion of the micro handle (6). (Machine-translation by Google Translate, not legally binding)