Stevens point-minneapolis coaxial cable

THE first commercial installation of coaxial cable in the Bell System now is being completed between Stevens Point, Wis., and Minneapolis, Minn., a distance of approximately 200 miles. As may be seen from the accompanying illustrations, the cable contains four coaxial units in the center and an outer layer of 18 19-gauge quads. In the central space formed by the coaxial units are two 22-gauge pairs, and in each interstice between coaxial units is a hybrid quad made up of one pair of 19- gauge and one pair of 22-gauge wires; these are required for auxiliary service. The experimental cable installed several years ago between New York, N. Y., and Philadelphia, Pa. (EE Jan. ´57, p. 4–7) contained two coaxial units and four pairs of 19-gauge wires.