Make tools, fittings, and small metal pieces used in other products.
Locates malfunctions in telephone or telegraph lines, using switchboard composed of electrical testing instruments, and coordinates maintenance crew’s work to remove malfunction: Tests lines to find cause and location of malfunction, using switchboard equipped with audible and visual alarms and electrical testing devices, such as voltmeter and resistance meter. Reports nature of trouble to inside and outside maintenance crews and directs and coordinates trouble-clearing activities. May dispatch maintenance crews to malfunctioning area. May contact subscribers to investigate reported trouble.