An engineer studying a large circuit diagram of equipment in a Crossbar telephone exchange late at night on an emergency callout in 1980.

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Size: 3858px × 2577px
Photo credit: © Andrew Popkin / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1980, 1980s, archival, archive, callout, cicuit, crossbar, diagram, emergency, exchange, nighttime, telephone