A million-cycle telephone system

ABOUT 2 years ago a new wideband system for multichannel telephone transmission over coaxial cables was described in an AIEE paper.1 An experimental system has now been installed between New York and Philadelphia. The various tests and trials which are planned for this system have not been carried far enough to justify a formal AIEE technical paper for presentation and discussion. Meanwhile, the considerable interest that has been aroused in the system has led to this brief statement of its principal features and its general technical performance as so far measured, which has been prepared by M. E. Strieby (M´22) carrier transmission research engineer of the Bell Telephone Laboratories, Inc., New York, N. Y.