The numerical-graphical method in the design of multiterminal switching circuits

Up to the present time there has been no satisfactory direct method for designing multiterminal switching circuits. A common approach is to consider each output individually and derive a 2-terminal network for it. An attempt is then made to change the form of the individual 2-terminal networks, if possible, so that combinations between paths may be facilitated. This may be done, for example, by algebraic manipulation of the switching functions describing the 2-terminal networks. Extreme care must be taken in any case so that the individual outputs remain disjunctive.