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 43
Y offices may be located anywhere, the question being one of local condi-tions. They may be in one of the two offices, as illustrated. They maybe in a third office. (Fig. 23.) In this case the traffic from the fouroffices at the left divides at office A for the 42-43 thousand office and the45^48… … Fig. 23.—Traffic divided atintermediate office. Fig. 24.—Traffic divided at two intermediate offices. he pulls any digit from 5 to 8 inclusive, that selector will trunkthe call to the upper office. Again, the traffic may be divided at two intermediate offices. (Fig.24.) In this case the traffic…
Telephone
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-363-229.webp)
