. American telephone practice . te-blue. The method of forming the end of a cable so as to facilitatethe soldering of its component wires is shown in Fig. 476. Thisfigure applies to machine cables, that is, to cables made up by machin- 656 AMERICAN TELEPHONE PRACTICE. ery in continuous lengths, and afterward cut to length before form-ing. Each cable is stripped at its end, and butted with tape at thepoint where the covering of the cable ends. The wires leading fromthe cable are then formed and laced in the manner shown in , the various pairs being led out at intervals corresponding toth
. American telephone practice . te-blue. The method of forming the end of a cable so as to facilitatethe soldering of its component wires is shown in Fig. 476. Thisfigure applies to machine cables, that is, to cables made up by machin- 656 AMERICAN TELEPHONE PRACTICE. ery in continuous lengths, and afterward cut to length before form-ing. Each cable is stripped at its end, and butted with tape at thepoint where the covering of the cable ends. The wires leading fromthe cable are then formed and laced in the manner shown in , the various pairs being led out at intervals corresponding tothe intervals between the terminals in the strip to which they areto be attached. The method of wiring the multiple cables is shown in Fig. 477,which shows a single strip of jacks with the ends of the cablesleading to the two adjacent sections soldered to it. A two-pointjack only is shown in the figure. The lay-out of a telephone exchange building involves not onlythe floor plan of the operating room, of the terminal room, and of. FIG. 477.—MULTIPLE JACK WIRING. rooms occupied by other portions of the equipment, but in modernpractice the primary design of the building itself. It is a matterfor which few general rules may be laid down, it being necessaryto solve the various problems arising, in view of the conditions ineach case. It may be said, however, in general, that except incomparatively rare cases, the space available for an operating roomusually makes it desirable to arrange the board in horseshoe form,the various sections being arranged in a line facing inward aroundthe operating room. The reasons for facing the boards inwardinstead of outward are several. The direct light from the windowsdoes not then fall on the face of the board, which might preventthe lamp signals from being distinctly seen by the operator whenlighted. Moreover, the light from the windows in the walls of the CENTRAL OFFICE EQUIPMENTS. 657 room may shine behind the board, which is an advantage from t
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