. American telephone practice . FIG- A. SCHEMATIC TALKING CIRCUIT OF A COMPLETED ^SELECTOR - Z*£SELECTOR CONNECTOR. IV SELECTOR SUBSTATION CALLING TRUNKING VL. vr: 1 CALLEP _VL I rrJ RrJ . K P»R L 1 ^JJiJ .VR rv; FIG. 613.—SCHEMATIC REPRESENTATION OF THE VARIOUS STEPS IN A CONNECTION. the two left-hand contacts of the side-switch lovers, 1 and 2, arc con-nected by wires designated respectively as rotary normal and 712 AMERICAN TELEPHONE PRACTICE. vertical normal, to the multiple bank contacts of the group of con-nector switches, serving the group of subscribers t
. American telephone practice . FIG- A. SCHEMATIC TALKING CIRCUIT OF A COMPLETED ^SELECTOR - Z*£SELECTOR CONNECTOR. IV SELECTOR SUBSTATION CALLING TRUNKING VL. vr: 1 CALLEP _VL I rrJ RrJ . K P»R L 1 ^JJiJ .VR rv; FIG. 613.—SCHEMATIC REPRESENTATION OF THE VARIOUS STEPS IN A CONNECTION. the two left-hand contacts of the side-switch lovers, 1 and 2, arc con-nected by wires designated respectively as rotary normal and 712 AMERICAN TELEPHONE PRACTICE. vertical normal, to the multiple bank contacts of the group of con-nector switches, serving the group of subscribers to which thisparticular first selector belongs. The lever, 3, of the side switch ispermanently connected by the private normal wire to the privatebank contacts on the same connector switches. These normal wiresform the path for the incoming calls to the line of this first selector,and it will be noticed that the contacts between the vertical androtary line wires, V and R, and the corresponding vertical and rotarynormal wires is severed as soon as the side switch of this firstselector is moved out of its normal position. At the lower portion of Fig. 512 are shown the wipers carried
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Keywords: ., boo, bookcentury1900, bookdecade1900, bookidamericantelepho00mill
