Guardian Exchange
Encyclopedia
Telephone exchange
In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls...
built in Manchester
Manchester
Manchester is a city and metropolitan borough in Greater Manchester, England. According to the Office for National Statistics, the 2010 mid-year population estimate for Manchester was 498,800. Manchester lies within one of the UK's largest metropolitan areas, the metropolitan county of Greater...
in the 1950s. It was built together with the Anchor Exchange
Anchor Exchange
Anchor Exchange was an underground, hardened telephone exchange built in Birmingham, England in the 1950s. It is located nominally on Newhall St....
in Birmingham
Birmingham
Birmingham is a city and metropolitan borough in the West Midlands of England. It is the most populous British city outside the capital London, with a population of 1,036,900 , and lies at the heart of the West Midlands conurbation, the second most populous urban area in the United Kingdom with a...
and the Kingsway exchange
Kingsway telephone exchange
Kingsway telephone exchange was a Cold War-era hardened telephone exchange underneath High Holborn in London.-History:The Kingsway telephone exchange was built as a deep-level shelter underneath Chancery Lane tube station in the early 1940s...
in London
London
London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...
- all believed to provide hardened communications in the event of nuclear war. Today the underground site is used for telephone cabling.