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 410
roup of ten to be busy at a moment when in a neigh-boring group all or nearly all trunks are idle, and, five minutes later, tofind the conditions just reversed. The great variations in the traffic of small trunk groups as comparedwith larger groups is illustrated by the curves in Fig. 303 in which… … 8% 7*.oo 6S?£5%% £> J z>; Z i 3*1 J < MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY Fig. 303.—Curves showing ratios of trunks in use to subscriber lines during the busy hour of each day of a week. the subscribers lines in service at half-hour intervals during the busyperiod of each…
Telephone
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