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A local exchange back in the days of manual switching.
Memories
WeLL knoWn for support of the young scientist and Technology exhibition, BT itself has quite an impressive track record in research. For more than a century the company has been conducting research, and this year BT’s records of this work have been recognised by unesCo as having Memory of the World status. Many of the projects undertaken by BT have had an enormous impact on how we communicate. Among the firsts, was microwave radio relay transmission in the 1950s, the first television broadcast to cross the Atlantic in 1962, the first digital telephone exchange in 1968, and possibly the biggest impact of all came with the development of extremely pure glass fibre in the 1970s. Those who are old enough to remember life before the Internet might remember how Prestel, the firs ??????????????????????????????????????????????????????????????????Q???????????????????????????????????????????????????????????????????????????5?????????????? P??????????????????Q?????????????%??????????????????????????????????????????????????????????????????????????????%??????????????????????????????????????????????????????????????5???????????????????????????????????()?%????????????????????????????????????????????????????????????????????????????????????????????)??????????
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