In this work, not only the principles by which manual and automatic systems function are distinguished, but also the background to the invention is given. This is done from the perspective of an unbiased international observer.To sura up, apart from a few smaller companies operating strictly at the national level, 1) there were by 1920 four major poles of switchgear (manual and automatic exchange) manufacture at the international level: aWestern Electric, with itsanbsp;...
|Title||:||100 Years of Telephone Switching|
|Author||:||Robert J. Chapuis, Amos E. Joel|
|Publisher||:||IOS Press - 2003-01-01|