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The Bell System was a system of telecommunication companies, led by the Bell Telephone Company and later by the American Telephone and Telegraph Company (AT&T), that dominated the telephone services industry in North America for over 100 years from its creation in 1877 until its antitrust breakup in 1983.
Airfix Railway System Multiple Train Control (MTC) was an analog system introduced in 1979 and used 20 V sinusoidal alternating current on the track with a superimposed control signal. It can control up to 16 locomotives, which a maximum of 4 at a time be controlled simultaneously.
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
Digital Command Control (DCC) is a standard for a system for the digital operation of model railways that permits locomotives on the same electrical section of track to be independently controlled. The DCC protocol is defined by the Digital Command Control Working group of the US National Model Railroad Association (NMRA).
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 ...
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.
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]