. Bell telephone magazine . onnected to maximum require four switches andbe routed as follows: Toll Center to Primary Outletto Regional Center to RegionalCenter to Primary Outlet toToll Center Fewer switches would be required inpractically all cases because the eco- 114 Bell Telephone Magazine SUMMER nomical design of the toll plant has to such equipment. The remaining resulted in the establishment of direct toll centers may have step-by-step toll circuits between many points at great equipment or a simplified form of distances from each other and thereby crossbar toll equipment. provided more
. Bell telephone magazine . onnected to maximum require four switches andbe routed as follows: Toll Center to Primary Outletto Regional Center to RegionalCenter to Primary Outlet toToll Center Fewer switches would be required inpractically all cases because the eco- 114 Bell Telephone Magazine SUMMER nomical design of the toll plant has to such equipment. The remaining resulted in the establishment of direct toll centers may have step-by-step toll circuits between many points at great equipment or a simplified form of distances from each other and thereby crossbar toll equipment. provided more direct routes not requiring so many intermediate ^ ]^o,i,^ ^f^i^^ Ahead switches. The General Toll Switching Plan WniLK complicated central officeforms a firm foundation on which to mechanisms are required at controlbuild the extension of toll dialing, switching points to make operatorUsing this plan, with the major toll dialing possible on a country-switching points already established wide basis, it is apparent that from. Cordless positions for setting up calls from cities not yet arranged for toll dialing for manual operation, it appearspracticable to locate crossbar switch-ing systems providing the featuresnecessary for control switchingpoints at important switching cen-ters, including the present regionaltoll centers and most of the presentprimary toll outlets. Thus provisionof control switching equipment atnot more than 150 points will be ade-quate to give every outward operatorin the 2400 toll centers direct access the operating standpoint this methodof handling long distance calls is sim-ple in the extreme. Its advantageshave been implied throughout thisdiscussion; they may be summarizedbriefiy thus: I. By 1940, a\erage speed of serv-ice on all Bell System long distancecalls had been brought down to with an average of aboutthree minutes on multi-switch calls. 1945 Operator Toll Dialitig II; With toll dialing, the speed onniulti-switeh calls is expected to be
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