File:Bell telephone magazine (1922) (14775949803).jpg

Identifier: belltelephonemag4344amerrich (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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e new L-4 route in Ohio. appears likely that PCM will permit theconstruction of cable routes with greatercapacity than anything now possible. Communication systems using hollowwave guides and laser beams are alsobeing investigated. This follows the BellSystem policy that its communicationfacilities should take diverse forms. All in all, the entire span of coaxial cablehistory has been marked by continuedand successful efforts to improve and toincrease the capacity of this importantcommunication medium. These accom-plishments point to an increased role forcoaxial cable in the Bell System networkof the future. MILESTONES IN THE DEVELOPMENT OFBROADBAND CABLE SYSTEMS CableCoaxials Carrier Circuits Year Bandwidth Rept. Spacing^ Per Route 1936 2 (.270) IMc 10 Miles 224 1940 4 (.270) 3Mc 5 Miles 600 1945 6 (.270) 3Mc 5 Miles 1200 1947 8 (.375) 3Mc 8 Miles 1800 1953 8 (.375) 8Mc 4 Miles 5580 1962 12 (.375) BMc 4 Miles 9300 1965 20 (.375) 8Mc 4 Miles 16740 1967 20 (.375) 18 Mc 2 Miles 32400 27
Text Appearing After Image:
Telephone and city officials in New York at the opening ceremonies of the first trans-continental telephone line. At center is Alexander Graham Bell, who made the first call. At the San Francisco end for the historic occasion was Thomas A. Watson, shown thirdfrom the left at the table, who was Bells assistant when the telephone was invented. •»;*?. f» J». *\ ^ Fifty years ago this January the telephone first spanned the continent— II a singular, astoundingaccomplishment H Hoy! Hoy! Mr. Watson! Are youthere? Do you hear me? Yes, Dr. Bell, I hear you perfectly.Do you hear me well? Yes, your voice is perfectly distinct.It is as clear as if you were here in NewYork instead of being more than 3,000miles away . . . . Thus did the inventor of the telephone,Alexander Graham Bell, and his formerassistant, Thomas A. Watson, officiallyinaugurate the opening of the first trans-continental telephone line 50 years ago.Bell talked from A.T.&T. headquartersin New York and Watson from theof

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