. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . Sub-office Swg. Reps Sec■ Main LocalConnectorj, Repeaters O Fig. 34.—Sub-office with switching repeater, 10,000-line system switch on second digit. to the wipers and the local connector, so that the switches in the mainoffice release. The switching depends upon both of the first two digits. Either onebeing wrong will cause the repeater to fail to switch to local. The sub-office may be increased to 1000 lines, maximum. The same switching repeater may be used i
. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . Sub-office Swg. Reps Sec■ Main LocalConnectorj, Repeaters O Fig. 34.—Sub-office with switching repeater, 10,000-line system switch on second digit. to the wipers and the local connector, so that the switches in the mainoffice release. The switching depends upon both of the first two digits. Either onebeing wrong will cause the repeater to fail to switch to local. The sub-office may be increased to 1000 lines, maximum. The same switching repeater may be used in a 100,000-line exchange 3 34 AUTOMATIC TELEPHONY by inserting third selectors between the repeater banks and the localconnectors. The sub-office must be made up of one or more thousands,each thousand being completely set aside for this sub-office. But otherthousands in the same 10,000 may be used elsewhere. The trunkinglimit of the sub-office is 10,000 lines, but this is never reached, becauseit would long before that have become a main office itself, and need to beequipped with first selectors. In the 100,000-line system, sub-offices may have less than 1000 lineseach by us
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttelephone, bookyear19
