cable tester

A documentary on how Cornwall became a hub for the world's communications, from the first transatlantic radio signal to modern undersea fibre cables. It describes how cable landing stations and the systems are put together.

A 1984 AT&T film showing the live cutover of a Glendale, California central office from step-by-step switching to an electronic switching system. Installers prepare the site and then cut cables in a coordinated operation.