multiplexer 135 is used to provide one low out of sixteen data distributions the selected pin goes low and all the other pins remain high the binary coded decimal is converted to a pin position by keeping the selected pin low and making all the other pins high another modification of the present invention is the application of signals from the multiplexer 135 to initiate a telephonic communication in this embodiment the change of potentials in the 1 to 16 multiplexer 135 can be used to signal a telephone circuit such as illustrated in fig1 referring first to fig1 the multiplexer 135 has pin positions 0 to 15 pin 138 is the 0 pin and pin 139 is the 15 pin these pins of multiplexer 135 are connectible with transistors 151 in fig1 these transistors 151 function as telephone switches the pulses from the multiplexer 135 cause selected transistors 151 to conduct and thus dial a selected telephone number in accordance with the selection of the transistors 151 this results in a convential processing of signals in the automative telephone dialer system 155 as illustrated in fig1 this embodiment of fig1 is another specific application of the use of the multiplexer to scan to ascertain the status of conditions or to initiate ancillary functions the advantages provided by the ability to introduce a measurable and variable delay includes providing.