Bell telephone magazine (1922) (14569803029)

Identifier: belltelephonemag09amerrich (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

Text Appearing Before Image:

es: 1. Ten trunks splitting. The incoming trunks are arranged in groups of ten so thatby means of splitting keys the B operators set maybe associated with any consecutive multiple of tentrunks. Thus she may handle 20, 30, 40, etc., trunksdepending on the number of calls. This flexibility per-mits force adjustment in close relation to the actualtraffic. 2. Release key. A release key permits the B operator to release thetrunk and thus be in a position to receive a new call,while she is establishing connection on a trunk just re-leased. This makes possible an overlap of work whichtends to decrease the B operators work time. Incase the B operator fails to operate the release keythe insertion of the trunk plug in the jack of the calledline or in a busy-back jack will also release the B operators set. 3. Pilot lamps. A pilot lamp associated with each ten trunk unit facilitatesthe location of a trunk that has been automatically con-nected with the B operators set. 31 BELL TELEPHONE QUARTERLY

Text Appearing After Image:

Q On ff STRAIGHTFORWARD TRUNKING METHOD 4. Locking disconnect and reselection while the trunk is in the subscribers multiple.If a trunk has been disconnected at the A end and thenreselected before the B operator has taken down theconnection, the disconnect signal remains lighted at the B board. If this trunk comes within the sequenceof selection at the B positions before disconnectiontakes place, the signal then flashes and the B oper-ators telephone set is associated with the trunk in theusual manner. 5. Automatic peg count. A peg count register for each B position is operated bythe depression of the release key or by the insertion ofa plug into a jack thus automatically giving a numericalrecord of the calls handled. 6. All trunks busy registers. A register is associated with each incoming trunk groupwhich indicates each time that all of the trunks arebusy. Information obtained from these registers isused in engineering the trunk plant. 7. Emergency listening jacks. Listening jack ci

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1922

Prelinger Library

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public domain