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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.
Although "Southwestern Bell" generally referred to the operations of the entire Baby Bell, in 1995, SBC decided to change its corporate name to SBC Communications in order to reposition itself as a national telecommunications company. Southwestern Bell Telephone underwent a branding overhaul and adopted the slogan, "Your friendly neighborhood ...
NAT traversal with SBC during user registration. Similar to the registration case, the SBC will also include itself in the path of INVITE and other request messages. When receiving an INVITE from a user agent behind a NAT, the SBC will include a via header with its own address, replace the information in the contact header with its own address and also replace the address information in the ...
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 ...
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.
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 ...
The acquisition complemented their existing SBC line with the NET UX series for SIP Trunking and SIP-based UC. [ 38 ] On December 13, 2013, Sonus agreed to acquire Performance Technologies Inc entered into a definitive merger agreement, under which Sonus will acquire PT for $3.75 per share in cash, or approximately $30 million.[6]