Recorder designed to measure traffic carried by apparatus in automatic exchanges and to analyze traffic flow over various individual gradings in order to allow of dispensing with analysis meters and frames and associated cabling; description of recorder; circuit operation; recorder for director exchanges; etc.
Automatic traffic recorder -- I
Post Office Elec Engrs' J
Post Office Electrical Engineers' Journal ; 28 , Part 1
1935
9 pages
Article (Journal)
English
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