File:Bell telephone magazine (1922) (14569867870).jpg

Identifier: belltelephonemag22amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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ffic than to handle traffic movingwithout delay. This principle can be visualized byfollowing through the train of eventswhen a surge of recording signalsoccurs at a toll board. Toll operators normally answer 86 Bell Telephone Magazine JUNE recording trunk signals within loseconds. Perhaps 5 to 6 percent ofthe answers may exceed this. If thispercentage inches up to 8, 9, or even10, some drag on the service occurs,but it is not serious. If it gets muchabove that, however, trouble startsto accumulate. The signals become too numerousfor operators to answer in order oftheir appearance on the switchboard, long distance operators in answeringmore than once on the same call. At about this point it becomesnecessary for operators to stop com-pleting calls in order to concentrateon recording the calls. This in turnnecessitates releasing the callingparty after he has given his call, eventhough a circuit may be available atthe time. When this happens, someof the circuits are left idle, thus wast-
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This is but one—and by no means the largest—of the Bell Systems longdistance switchboards through which the nations war calls are pulsing in ever increasing volume and thus some are answered verypromptly while others may go un-answered for long intervals. As this occurs, the calling partieshave a tendency to hang up and callagain—starting a new train of sig-nals. PBX operators are likely to call ontwo or more trunks simultaneously,causing more signals, further conges-tion, and unnecessary work by the ing circuit time. When the recording signals areunder control, the operators thenundertake to complete the calls whichhave accumulated. First, the callingpartys line is obtained over a switch-ing trunk. The plant is designed foronly a limited amount of calling backfor the originating line, and thusswitching trunks are not ordinarilyadequate for a large accumulation of 1943 The Impact of War on Long Distance Service 87 backed up calls. The recording orrecording-completing trunks on w

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