. The Bell System technical journal . Fig. 18—Typical panel selector frame. Capacity 30 selectors in front and 30selectors in rear. Motor driving mechanism is at the bottom of frame and controllincapparatus at either side. TELEPHONE SYSTEM OF THE UNITED STATES 25. Fig. 19—Panel dial office sender frame showing the apparatus for five senders. 26 BELL SYSTEM TECHNICAL JOURNAL to the routings involved in order to trunk economically either largeor small volumes of trafific. The panel system was developed tomeet these requirements and is now installed in a number of suchmetropolitan centers, notabl
. The Bell System technical journal . Fig. 18—Typical panel selector frame. Capacity 30 selectors in front and 30selectors in rear. Motor driving mechanism is at the bottom of frame and controllincapparatus at either side. TELEPHONE SYSTEM OF THE UNITED STATES 25. Fig. 19—Panel dial office sender frame showing the apparatus for five senders. 26 BELL SYSTEM TECHNICAL JOURNAL to the routings involved in order to trunk economically either largeor small volumes of trafific. The panel system was developed tomeet these requirements and is now installed in a number of suchmetropolitan centers, notably, New York, Chicago, Philadelphia,Boston, Detroit, Cleveland, St. Louis, Pittsburgh, Baltimore, SanFrancisco, Buffalo, Kansas City, Seattle, Providence and equipment is in service in 128 offices to which are million stations.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
