Excerpt from Telephony, Vol. 5 of 6: A Manual of the Design, Construction, and Operation of Telephone Exchanges; The Substation
The sub-station appeals to the public. It is the machinery that the subscriber sees, feels, uses and is to him a reality. That a central office exists he is dimly aware but chiefly as an object of anathematization, and as for the wire plant, few even know that there is such a thing. Therefore, aside from all technical consideration it is the most important portion of the telephone exchange. Substations are distributed over an immense field, both geographically and psychologically. They extend from the pole and equator, from the desk of the magnate and the palace on Fifth avenue to a shelf in the Chinese laundry and the walls of an East-side tenement. To meet conditions so utterly diverse requires a display of the most profound ingenuity; a skill that is technical to enable the apparatus to successfully cope with the most heterogeneous physical conditions; and a skill that is psychologic to enable it to satisfy conditions that are equally diverse mentally. There is little danger that the telephone engineer will forget the central office or wire plant, for these are ever present to his eyes, but owing to its distribution the sub-station i 3 less conspicuous. Naturally the sub-station has been a favorite topic of many writers, so little that is novel can be claimed for the present presentation.
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