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The breakup of the Bell System resulted in the creation of seven independent companies that were formed from the original twenty-two AT&T-controlled members of the System. [5] On January 1, 1984, these companies and the local operating companies placed under them were: Ameritech. Illinois Bell; Indiana Bell; Michigan Bell; Ohio Bell; Wisconsin Bell
The Fall of the Bell System A Study in Prices and Politics (1987) Watzinger, Martin, and Monika Schnitzer. "The breakup of the Bell System and its impact on US innovation." (2022). online; White, Lawrence J. "US telephone deregulation: lessons to be learned, mistakes to be avoided." Japan and the World Economy 12.2 (2000): 173-183. online}
Western Electric Co., Inc. was an American electrical engineering and manufacturing company that operated from 1869 to 1996. A subsidiary of the AT&T Corporation for most of its lifespan, Western Electric was the primary manufacturer, supplier, and purchasing agent for all telephone equipment for the Bell System from 1881 until 1984, when the Bell System was dismantled.
C/MRI (Computer/Model Railroad Interface) is a set of electronic modules that allow a computer to monitor and control real world devices, including those used in conjunction with model railroads. C/MRI was first introduced by Bruce Chubb in the February 1985 issue of the Model Railroader magazine. It appeared again with a four-part series ...
The Model 35 interface will accept DC current (20 ma or 60 ma). An optional modem interface provides for operation over voice-grade channels. The modem transmits asynchronously in serial format, compatible with Bell System 101, 103 and 113 data sets or their equivalent. The Teletype Model 35 ASR is 38.5 inches high, 40 inches wide and 24 inches ...
A view of the HO scale model of the Green Building at the Tech Model Railroad Club in Cambridge, MA. The Tech Model Railroad Club (TMRC) is a student organization at the Massachusetts Institute of Technology (MIT). [1] Historically, it has been a wellspring of hacker culture and the oldest such hacking group in North America. [2]
This really was the first digital system [4] and as such was a forerunner to the Märklin Digital which appeared in the mid-1980s and the National Model Railroad Association (NMRA) Digital Command Control (DCC) system, which appeared around 1990 and was standardized internationally in the mid-1990s.
AT&T Communications was renamed AT&T Communications – East, Inc. and sold long-distance telephone service and operated as a CLEC outside of the borders of the Bell Operating Companies that AT&T owned. It has now been absorbed into AT&T Corp. and all but 4 of the original 22 subsidiaries that formed AT&T Communications continue to exist.