Women at work at London telephone exchange.
The Queen makes Trunk phone call from the exchange in Bristol to Lord Provost of Edinburgh.
A man dials 'TIM' then we hear and see the workings of the speaking clock.
Various shots of women and men working on small telephone switchboard / exchange.
Girls roller skating around a telephone exchange in Los Angeles.
Fascinating glimpse inside London's Overseas Telephone Exchange - we get to eavesdrop on a few calls to foreign lands.
A look around trunk telephone exchange in disused Underground tunnels beneath Holborn.