Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 132
This is a very interesting and valuable partfor by means of it all the trunking flexibilities are worked out, and a studyof it will unlock the plan by which any office or exchange is linkedtogether. The other end of the selector board (Fig. 99) contains a doorwayto give access to the interior of… … Fig. 98.-—Selectors installed. proximity to the ends of the terminal assembly. The strips in thelatter are numbered from left to right. Hence, one bay adjoins the lownumbered end of all strips, while the other is near the high numberedends. It is now customary to number all the bays or frames in a…
Telephone
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