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AT&T Computer Systems is the generic name for American Telephone & Telegraph 's unsuccessful attempt to compete in the computer business. In return for divesting the local Bell Operating Companies ( Baby Bells ), AT&T was allowed to have an unregulated division to sell computer hardware and software. The company made the 3B series computers .
Input. Keyboard, 3-button Mouse. Connectivity. RS-232 port, Parallel port, 3 phone jacks. Mass. 40 lb (18 kg) The AT&T UNIX PC is a Unix desktop computer originally developed by Convergent Technologies [2] (later acquired by Unisys ), [5] [1] and marketed by AT&T Information Systems in the mid- to late-1980s. The system was codenamed "Safari 4 ...
The Bluetooth protocol RFCOMM is a simple set of transport protocols, made on top of the L2CAP protocol, providing emulated RS-232 serial ports (up to sixty simultaneous connections to a Bluetooth device at a time). The protocol is based on the ETSI standard TS 07.10. RFCOMM is sometimes called serial port emulation.
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History of AT&T. The history of AT&T dates back to the invention of the telephone. The Bell Telephone Company was established in 1877 by Alexander Graham Bell, who obtained the first US patent for the telephone, and his father-in-law, Gardiner Greene Hubbard. Bell and Hubbard also established American Telephone and Telegraph Company in 1885 ...
The AT&T Madison Complex Tandem Office is a 17-story, 79 m (259 ft) building in Los Angeles, California, completed in 1961. With its microwave tower, used through 1993, bringing the overall height to 137 m (449 ft), it is the 29th tallest building in Los Angeles. The building serves 1.3 million phone lines in area code 213, and other Los ...
United States. Products. Long distance. Parent. AT&T Corporation (1984–2005) AT&T Inc. (2005–2010) Website. www .att .com. AT&T Communications, Inc., doing business as AT&T Communications, was a division of the AT&T Corporation that, through 23 subsidiaries, provided interexchange carrier and long-distance telephone services.
AT&T Cybersecurity. Website. www .att .com. AT&T Communications is a division of AT&T that focuses on mobile phone, broadband, fixed line telephone, home security, network security, and business services. The division houses AT&T Mobility, AT&T Internet, AT&T Phone, AT&T Long Distance, AT&T Labs, AT&T Digital Life, and AT&T Cybersecurity .