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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 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.
The Southwestern Bell brand vanished in late 2002 when SBC dropped the names of all its operating companies to use "SBC" as a national brand. Since d.b.a. names weren't approved before publishing deadlines for telephone directories distributed in December 2002 and January 2003, the Southwestern Bell Telephone Co. name remained on telephone ...
SBC Long Distance is a separate subsidiary than AT&T Communications, the incumbent long-distance carrier for most of the country acquired in the SBC merger with AT&T. SBC Long Distance started in 1996 as Southwestern Bell Communications Services, Inc. , created as a result of the Telecommunications Act of 1996 which allowed the Baby Bells to ...
SBC announced in October 2005 that it would shed the "SBC" brand and take the more recognizable AT&T brand, along with the old AT&T's "T" NYSE ticker symbol. Merger approval concluded on November 18, 2005; SBC Communications began rebranding the following Monday, November 21 as "the new AT&T" and began trading under the "T" symbol on December 1 ...
Malheur Bell, an autonomous local phone company owned by Qwest, used the Bell name and logo until its merger into Qwest in 2009. Apart from historical documents, AT&T does not presently make active use of the Bell marks. Its local exchange companies have retained the "Bell" names; however, they have been doing business under other names since 2002.
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In 2001, two years after Ameritech was acquired by SBC Communications, SBC rebranded all of its companies to include the SBC name, and Indiana Bell began doing business as SBC Ameritech Indiana. In 2002, SBC rebranded all of its companies simply as "SBC" for use as a national brand. Indiana Bell then started doing business as SBC Indiana.