Impulse analysis and common control in an electronic telephone switching system

This paper discusses the conversion of telephone-line supervision signals into digital logic signals, and the subsequent storage and control of the dialed information, in a telephone switching system using time-division multiplex techniques. Emphasis is on the analyzed-signal timing tolerances and minimization of the logic control functions of the register. Reuse of storage elements for multiple functions on a time discrimination basis and the elimination of logic stages to reduce series delay are also discussed.