Title :
Plug-in units for long lines circuits
Author_Institution :
Northern Electric Company, Ltd., Ottawa, Ont., Canada
Abstract :
The extension of dialing, ringing, and supervision ranges in a voice-frequency telephone circuit is achieved by a unit which requires no local ringing generator and has self-contained power supply. Two extension circuits and the necessary power supply, which has an alarm in case of failure, are mounted on a portable plug-in unit.
Keywords :
Capacitors; Central office; Circuit faults; Electric potential; Resistors; Transistors; Wiring;
Journal_Title :
American Institute of Electrical Engineers, Part I: Communication and Electronics, Transactions of the
DOI :
10.1109/TCE.1962.6373144
