Editing Strowger switch (section)

===British deployment===
[[File:Strowger switch Milton Keynes Museum.jpg|thumb|British SXS two-motion contact bank]]
From 1912, the British [[General Post Office]], which also operated the British telephone system, installed several automatic telephone exchanges from several vendors in trials at Darlington on 10 October 1914 and Dudley on 9 September 1916 ([[rotary system]]), Fleetwood (relay exchange from Sweden), Grimsby (Siemens), Hereford (Lorimer) and Leeds (Strowger).<ref>[http://www.btplc.com/Thegroup/BTsHistory/1912to1968/1927.htm Events in Telecommunications History – 1927] {{Webarchive|url=https://web.archive.org/web/20160622215413/http://btplc.com/Thegroup/BTsHistory/1912to1968/1927.htm |date=2016-06-22 }} BT Archives</ref> The GPO selected the Strowger switches for small and medium-sized cities and towns. The selection of switching systems for [[London]] and other large cities was not decided until the 1920s, when the [[Director telephone system]] was adopted. The Director systems used SXS switches for destination routing and number translation facilities similar to the register used in common-control exchanges. Using similar equipment as in the rest of the network was deemed beneficial and the equipment could be manufactured in Britain.