Hello, Operator

A telephone exchange of five rooms and a hallway, with wood panelling and warm lamps. Top left, an operator in a yellow top works a control desk while a woman in a green blazer with a clipboard stands under a training diagram and wiring charts. Beside it, three women take a tea break at a round table under flowered wallpaper, with a biscuit tin nearby. Downstairs on the left, operators plug cables into a switchboard under a coloured city map while two people in lab coats and jackets take notes. In the middle, a man checks cables on a tall metal rack as a woman reads a slip beside cabinets of drawers, and a woman at a slanted desk reads a card index. At right, a man uses a wall phone beside green, red and blue booths. Green, red and blue booths line up at the end like coloured keys, the brightest corner of the building.