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A vertical service code ( VSC) is a sequence of digits and the signals star (*) and pound/hash (#) dialed on a telephone keypad or rotary dial to access certain telephone service features. [ 1] Some vertical service codes require dialing of a telephone number after the code sequence. On a touch tone telephone, the codes are usually initiated ...
The Hayes command set (also known as the AT command set) is a specific command language originally developed by Dale Heatherington and Dennis Hayes [ 1][ 2] for the Hayes Smartmodem 300 baud modem in 1981. The command set consists of a series of short text strings which can be combined to produce commands for operations such as dialing, hanging ...
The No. 4 Electronic Switching System ( 4ESS) is a class 4 telephone electronic switching system that was the first digital electronic toll switch introduced by Western Electric for long-distance switching. It was introduced in Chicago in January 1976, to replace the 4A crossbar switch. [1] The last of the 145 systems in the AT&T network was ...
AT&T Merlin. AT&T Merlin is a corporate telephone system by American Telephone and Telegraph (AT&T) that was introduced in late 1983, when it was branded American Bell Merlin. After the breakup of AT&T in 1984, it was rebranded and later also supplied by Lucent and Avaya . The system was designed at the beginning of the 1980s prior to the Bell ...
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 ...
Adaptive cruise control by the Insurance Institute for Highway Safety (example video) Adaptive cruise control ( ACC) is a type of advanced driver-assistance system for road vehicles that automatically adjusts the vehicle speed to maintain a safe distance from vehicles ahead. As of 2019, it is also called by 20 unique names that describe that ...
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 .
AT&T Basking Ridge "Pagoda" campus renditions for office complex, 1972 AT&T 550 Madison Ave building no longer corporate headquarters after 1992 (pictured 2021) In 1978, AT&T commissioned a new building at 550 Madison Avenue. This new AT&T Building was designed by Philip Johnson and quickly became an icon of the new Postmodern architectural ...