Communication system on the Pennsylvania railroad

COMMUNICATION services required for operation of the Pennsylvania Railroad and for the convenience of its patrons are described in this paper, including a description of the company-owned outside plant required to provide these services, as well as tabulations showing the magnitude of some classes of business handled and plant involved. The Pennsylvania Railroad owns, maintains, and operates its pole lines, conduit lines, and cable system, and where wires or cables of commercial telegraph or telephone companies are on the railroad right-of-way, they are on a rental basis