Abstract :
THE TECHNICAL ADVANCES in the art of telegraphy, resulting in the fully automatic selective-switching system in a modern telegraph office, have necessitated major improvements in the wire and cable network, particularly in the mechanized communication centers, to insure efficiency of operation and dependability of the complex electronic equipment in continuous operation over a wide range of frequencies and operating conditions. In each of these centers, the proper functioning of the high-speed equipment is dependent upon the performance of some 3,000 miles of high-grade wire conductors and more than 1,000,000 intricate wire connections.
