. American telephone practice . evedto be the largest multiple board (present equipment linos).in the United States, and that there is but one other board havingthe same ultimate capacity (18,000 lines). This board and theentire central office equipment was installed by the Kellogg Switch-Board and Supply Company. The building was erected specially forthe purpose, and is used by the telephone company exclusively. Ttis a three-story structure, fire-proof throughout. 684 AMERICAN TELEPHOXE PRACTICE. The basement of the building contains a large room for storagebesides the usual heating and
. American telephone practice . evedto be the largest multiple board (present equipment linos).in the United States, and that there is but one other board havingthe same ultimate capacity (18,000 lines). This board and theentire central office equipment was installed by the Kellogg Switch-Board and Supply Company. The building was erected specially forthe purpose, and is used by the telephone company exclusively. Ttis a three-story structure, fire-proof throughout. 684 AMERICAN TELEPHOXE PRACTICE. The basement of the building contains a large room for storagebesides the usual heating and ventilating apparatus and other equip-ment found in a modern building of this size. The first floor isdevoted entirely to the general offices and reception rooms of thecompany, and nothing has been spared to enhance its architecturalbeauty. In Fig. 492 is shown a view of the foyer on the main floor,showing the windows leading to the cashiers office on the righthand, and the main stairwav on the second floor to the left. In one. FIG. 497. -GENERAL VIEW OF TERMINAL AND POWER ROOM—LOSANGELES OFFICE. corner of this room is placed a row of long-distance booths servingas a public long-distance station. In Fig. 493 is shown the cable vault by means of which all theunderground cables enter the exchange. This picture was takenbefore all the cables were drawn in. This vault is under the side-walk in front of the building, and communicates directly with themain cable run leading to the second floor. Fig. 494 shows a view of the cable run at a point where thecables turn from a horizontal to a vertical direction, after whichthey extend through a narrow cable shaft to the second floor, this CENTRAL OFFICE EQUIPMENTS. 685 shaft being approximately 20 feet long by 8 inches wide. Therewere at the time this view was taken thirty-two 300-pair cables inthis run, thus giving a cable capacity of 9,600 lines. The floor plan of the terminal room is shown in Fig. 495, andfrom this it will be seen th
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Keywords: ., boo, bookcentury1900, bookdecade1900, bookidamericantelepho00mill
