Wire and cable in the telegraph industry

THE TECHNOLOGICAL advances in the art of telegraphy, starting with the original simple Morse key, sounder, and relay, and progressing to the semiautomatic, and then the fully automatic selective-switching system in a modern telegraph office of today, have justified the modernization of the wire and cable network, insuring efficiency of operation and dependability of the complex electronic equipment, which is in continuous operation over a wide range of frequencies and operating conditions. An extremely essential component of this network is the wire plant concentrated in each of the mechanized communication centers where the proper functioning of the automatic 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.