Guidelines for trolley carrier phone systems was prepared and documented to enable operating personnel to improve and upgrade their carrier phone systems. These guidelines cover installation of equipment, conversion of a rail haulage trolley wire and feeder system into a functional carrier frequency transmission line, performance checkout of the trolley carrier phone system, and the development of practical portable test instrumentation. This report summarized the program that led to the development of the guidelines and recommends a program to test and improve their effectiveness.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB 273 479 Available for Reference At Bureau Libraries
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