A common directory code for digital and analog networks

Abstract

Free flow of traffic from Telegraphic Message Systems into and out of the switched voice network is now blocked by the lack of common directory codes and methods for direct easy translation from the message traffic codes (Baudot, Fieldata, etc.) into switching instructions for use by the line switching gear. This block may be removed by the choice of message directing codes usable by both systems without the necessity for intricate translating gear. There is inherent in most digital codes, a group of symbols that may be translated directly into digital directing codes usable by both the telephone switching gear and by telegraphic systems.