BT Openreach engineer working on a telephone exchange box in north London, England Stock Photo - Alamy
Inside a BT Exchange - Telephones UK
Bob Deering on Twitter: "Very privileged to represent @hertscc today at an @WeAreOpenreach visit to what we used to call a telephone exchange. Wow ! Squillions of miles of copper (below) making
Life On The Exchange - Stories From The Hello Girls - Science Museum Blog
Kitz - Inside the telephone exchange .::
BT Frame room telephone exchange inside Bentwaters Cold War museum, Suffolk, England, UK Stock Photo - Alamy