Publications

A Review of the Principal Types and the Properties Desired of These Springs This article describes the types of springs employed in telephone a p p a r a t u s a n d enumerates the engineering requ

Telephone Communication System of the United States1 By BANCROFT GHERARDI and F. B.

A description of the production, properties and testing of condensers with wax-impregnated paper and electrodes of metal foil or metallised paper (Mansbridge type) which are used in large numbers i

Some of the important developments contemplated in the a p p a r a t u s and equipment for long toll cable circuits are described.

This paper describes the telephonic arrangements at the Gare St. Lazare, at Paris, for linking up the various sections of the State Railway system.

A unique, low-power, dc-to-dc switching converter has been developed to provide dc power for analog telephone lines.

Optical Calling Plans (OCPs) such as AT&T's Reach Out (R), offer discounts on toll calls in exchange for the payments of a monthly fee, OCP tariffs consist of this flat monthly charge, and usag

On January 1, 1931, the local operating company in the International and Telephone Telegraph group of companies took over the operation of the local and toll telephone network.

The Public Switched Telephone Network (PSTN) was designed for high reliability and availability and has achieved an impressive record of service over its history.

Various papers, some of them listed in the references, have presented material on two interrelated subjects: (1) automatic data processing as applied to machine switching in the Bell System, and (2