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Issuance of Bell System Practices within the Bell System started in the late 1920s, when they replaced a similar compendium, the AT&T Handbook Specifications.Initially, BSPs were identified by mixed alphanumeric sequence numbers designating a section and a specific document number within each section.
AT&T Internet provides internet access to computers connected on-premises via Ethernet cabling or Wi-Fi from the included residential gateway or DSL modem. AT&T Fiber, or as it is known AT&T Internet powered by Fiber, [2] provides fiber to the home (FTTH) service in select markets. Historically a form of AT&T Fiber Internet launched in the fall ...
AT&T Long Distance was the primary customer for the switch. Driving development from the customer's perspective was AT&T VP Billy Oliver. [4] Previous tandem switching systems, primarily the No. 4 Crossbar switch, used analog voice signaling. The decision to switch in a digital voice format was controversial at the time, both from a technical ...
AT&T Computer Systems (abbreviated AT&T-CS) was the home of the UNIX System V operating system, originally developed in the Bell Labs Research Division. The important System V Interface Definition (SVID) was written, attempting to standardize the various flavors of Unix , and define the official interfaces which made up a Unix operating system.
They run the AT&T UNIX operating system and were named after the successful 3B20D High Availability processor. In 1984, after regulatory constraints were lifted, AT&T introduced the 3B20D, 3B20S, 3B5, and 3B2 to the general computer market, [ 1 ] [ 5 ] a move that some commentators saw as an attempt to compete with IBM . [ 6 ]
L-carrier also carried the first television network connections, though the later microwave radio relay system soon became more important for this purpose. Type L-3 was used for a short time for coast-to-coast network television feeds, but the advent of NTSC color was the cause for the move to Type TD microwave radio.
AT&T (originally American Telephone & Telegraph Company), after divesting ownership of the Bell System, restructured its remaining companies into three core units. American Bell, Bell Labs and Western Electric were fully absorbed into AT&T, and divided up as an umbrella of several specifically focused companies held by AT&T Technologies, [1] including:
As a twenty-five percent owner, AT&T Information Systems utilized production of Olivetti to manufacture their AT&T PC 6300 series of computers. Along with the 3B series computers and the AT&T UNIX PC the PC 6300 series of computers represented a multi-faceted strategy of competing with IBM, who was the leading computer manufacturer of the time.
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