Abstract
THE 45A 12-channel carrier system for open-wire lines is the first of a new line of carrier equipment known as the 45 class, developed for application on open-wire lines, paired and coaxial cable, and radio systems. Both electrical and mechanical design have been co-ordinated for each of the systems, and basic terminal equipment is identical for the various applications. Great stress has been placed on standardization, both to speed the development in the different areas of ultimate use, and also to increase the demand for specific items of manufacture.
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