Fig. 432. Main Distributing Frame, Lansing Office
[View full size illustration.]

Fig. 433. Line Switches
[View full size illustration.]

Fig. 434. Secondary Line Switches and First Selectors
[View full size illustration.]

Automatic Offices. There is no great difference in the amount of floor space required in central offices employing automatic and manual equipment. Whatever difference there is, is likely to be in favor of the automatic. The fact that no such rigid requirement exists in the arrangement of automatic apparatus, as that which makes it necessary to place the sections of a multiple board all in one row, makes it possible to utilize the available space more economically with automatic than with manual equipment.

Fig. 435. Second Selectors
[View full size illustration.]