Title :
A carrier telegraph system for short-haul applications
Author :
Hysko, J. L. ; Rea, W. T. ; Roberts, L. C.
Author_Institution :
Bell Telephone Laboratories, Inc., New York, N. Y.
fDate :
7/1/1952 12:00:00 AM
Abstract :
This compact frequency-shift carrier telegraph system provides channels in and above the voice range. The channel terminal unit incorporates arrangements for handling Teletypewriter Exchange Service supervisory signals and employs no electromagnetic relays.
Keywords :
Central office; Electron tubes; Low pass filters; Oscillators; Radio spectrum management; Repeaters; Switches;
Journal_Title :
Electrical Engineering
DOI :
10.1109/EE.1952.6437588
