Electronics in Telephone Switching Systems
A. E. Joel · Bell System Technical Journal · 1956
In recent years a number of fundamentals has been discovered through research which place new tools at the disposal of the circuit and system designers. Examples of this “new art” are concepts such as information theory, dealing with the quantization and transmission of information, and solid state principles from which have developed the transitor and other devices. This paper surveys certain new art principles, techniques and devices as they apply to the design of new telephone switching systems.