Dial TWX station facilities

Dial teletypewriter exchange (TWX) stations utilize a data set for converting d-c telegraph pulses to a-c signals suitable for the telephone network. This discussion of the dial-operated TWX station highlights four separate areas of interest concerning this data set and the over-all station design: (1) how the frequency-shift-keyed (FSK) circuitry operates to convert d-c to a-c signals; (2) how the station control circuitry performs within the system; (3) experimental data-transmission test results; and (4) packaging and equipping the complete unit.