Bell telephone magazine (1922) (14756454475)

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

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he tandem board is also re-flected in the A operators work time since she is waitingon the connection to pass the order to the B operator, andthis in turn is reflected in the service by speeding up the con-nection to some extent. An interesting development growingout of the introduction of the straightforward method has beenthe extension of the tandem areas by routing the traffic be-tween more distant points through tandem boards as comparedwith the more expensive and somewhat slower toll board op-erating method. In closing this article a word as to the extent of straightfor- 36 STRAIGHTFORWARD TRUNKING METHOD ward operation may be of interest. This method is now in useat approximately 7,000 B positions in thirty of the largercities. Ten former call circuit tandem switchboards with about450 positions have been converted to straightforward opera-tion, and eight new straightforward tandem boards have beeninstalled with 70 positions. F. S. James,W. E. Farnham. 37 BELL TELEPHONE QUARTERLY

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Communications for Aviation Present Status of Aviation in the United States THE past year has witnessed important developments invirtually every phase of civil aeronautics. Spectacularachievements have combined with regularly scheduled opera-tions to popularize air transportation. It has been estimatedthat more than half a billion dollars is now invested in the air-plane industry in the United States. During 1928, 35 companies operated over civil airways 50scheduled air lines and flew a total distance of 10,673,450 miles.These operators transported 49,713 passengers, 1,848,156pounds of express, and 4,063,173 pounds of mail. There are now 29,227 miles of established airways in theUnited States. More than 10,000 miles of these airways arelighted for night flying and 2,065 miles are in process of beinglighted. The accompanying map shows the airways through-out the country as of September 1, 1929. On November 1st the Department of Commerce reportedthat 82,816 plane-miles are flown daily o

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1930 maps of the united states bell telephone magazine 1930 bell telephone magazine maps maps of air routes maps bell telephone company telephone american telephone and telegraph company history of technology flight aeronautics high resolution

1922

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