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SBC Telecom, Inc. d/b/a AT&T Small Business is a CLEC owned by AT&T that offers local telephone service outside the AT&T Bell Operating Company regions. [1] [better source needed] It was formed in 1999 following provisions that required SBC Communications to offer telephone service outside its boundaries in order to get approval to merge with Ameritech.
In many cases the SBC hides the network topology and protects the service provider or enterprise packet networks. The SBC terminates an inbound call and initiates the second call leg to the destination party. In technical terms, when used with the SIP protocol, this defines a back-to-back user agent (B2BUA). The effect of this behavior is that ...
SBC Southwestern Bell logo, 2001–2002. From late 2002 to 2005, Southwestern Bell conducted business under the following names: SBC Arkansas, SBC Kansas, SBC Missouri, SBC Oklahoma, SBC Southwest, and SBC Texas. Southwestern Bell payphone with new AT&T signage. SBC Communications bought AT&T Corp. on November 18, 2005, and changed its name to ...
Southwestern Bell Corporation, which changed its name to SBC Communications in 1995, acquired Pacific Telesis in 1997, SNET in 1998, and Ameritech in 1999. In February 2005, SBC announced its plans to acquire former parent company AT&T Corp. for over $16 billion. SBC took on the AT&T name upon merger closure on November 18, 2005.
Business management layer: performs functions related to business aspects, analyzes trends and quality issues, for example, or to provide a basis for billing and other financial reports. Service management layer: performs functions for the handling of services in the network: definition, administration and charging of services
SBC purchased Southern New England Telecommunications in 1998 for $5.01 billion, [13] and Ameritech in 1999 for $61 billion, creating the largest U.S. local phone company at the time. [14] AT&T Corporation , the original parent, was acquired effective November 18, 2005, by SBC, which renamed itself AT&T Inc. and began using the ticker symbol "T ...
SBC Long Distance LLC [1] [2] is a long-distance telephone company owned by AT&T that does business as AT&T Long Distance. SBC Long Distance competes with other long-distance providers who provide service within some of the Bell Operating Company service boundaries of AT&T .
In 2001, following Ameritech's acquisition by SBC Corporation, Wisconsin Bell began doing business as SBC Ameritech Wisconsin, which was shortened in 2002 to SBC Wisconsin. In 2005, it adopted the trade name AT&T Wisconsin after SBC acquired the original AT&T Corporation and took the AT&T name. The corporate name remains Wisconsin Bell.