File:Bell telephone magazine (1922) (14569641020).jpg

Identifier: belltelephone7273mag00amerrich (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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-gram in terms of reduced turnoverand training, because it is impossi-ble to say whether or not a givenemployee would have left the com-pany if Illinois Bells Day Care staffhad not helped solve her child careproblems. However, the company isaware that some employees had al-ready quit or were working their lastweek when the company found ar-rangements for them. After comparing the cost of oper-ating the day care home with thecost of training new employees, Illi-nois Bell concluded that if the pro-gram has prevented even half of the359 employees assisted from leav-ing, it is more than paying for itself. Ultimately, AT&T must decidewhether it favors community-basedcenters or foster homes, a combina-tion of the two, an entirely differentapproach or none at all. Meanwhile,the experiment is under way, thedetermining data are coming in,and enthusiasm and expectationsare high. After a year of trial, daycare in the Bell System has bothproblems and great promise. .* ** S .>. ■r. ■ 14
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OPTICAL FIBERS CABLE FORTHE LASER Light, as seen here transmitted through tinyfibers of glass, may one day carry Bell Systemvoice and data communications. Such glass fiberpaths might be used on routes ranging from afew hundred feet to thousands of miles. Theseglass-coated glass fibers are only a few thou-sandths of an inch in diameter, yet they offer thepotential advantage of vastly higher capacitythan conventional cables. Ancient glassblowers may have been the firstto notice the ability of glass to conduct light alonga straight or curved path. This principle, knownas multiple internal reflection, was demonstratedin 1870 by the British physicist John Tyndall,who made light take a curved path by use of astream of water. Early in the 20th century, scientists consideredthe possibility of conducting light by means offibers of optical materials, such as uncoated andplastic-coated glass and quartz. Laser light loss-es, through absorption by the fiber itself andthrough light escaping through

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