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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.
SIP is distinguished by its proponents for having roots in the Internet community rather than in the telecommunications industry. SIP has been standardized primarily by the Internet Engineering Task Force (IETF), while other protocols, such as H.323, have traditionally been associated with the International Telecommunication Union (ITU).
Acronym Name Notes 1ESS: Number 1 Electronic Switching System (Alcatel-Lucent) US 1FR: Flat rate service: US 2G: second-generation mobile telephone 2.5G: Enhanced 2G mobile telephone 3G: third-generation mobile telephone 4ESS Number 4 Electronic Switching System (Alcatel-Lucent) 4WTS: Four-wire termination set: US 5ESS
SBC Cinemas, cinema chain in Taiwan, now part of Vue International; SBC Telecom, a US telecom corporation; Seattle's Best Coffee, American coffee retailer; Security Bank Corporation, Philippines; Service Bureau Corporation, former IBM subsidiary divested in 1973; South Bay Conservatory, a performing arts company, Los Angeles, California, US
DDL—Data Definition Language; DDoS—Distributed Denial of Service; DDR—Double Data Rate; DEC—Digital Equipment Corporation; DES—Data Encryption Standard; dev—development; DFA—Deterministic Finite Automaton; DFD—Data Flow Diagram; DFS—Depth-First Search; DFS—Distributed File System; DGD—Dworkin's Game Driver
Telecom Telecom Glossary: POST: Power-on self test Hardware Cisco Catalyst 2800 User Guide, for example POTS: Plain old telephone service Telecom Telecom Glossary: PPP: Point-to-point Protocol Telecom RFC 1661 PPTP: Point-to-Point Tunneling Protocol Telecom RFC 2637 PTT: Public Telephone and Telegraph Telecom Telecom Glossary or Free Dictionary ...
SBC Communications announced its plans for a fiber-optic network and Internet Protocol television (IPTV) deployment in 2004 and unveiled the name "U-verse" (formerly "Project Lightspeed" [23]) for the suite of network services in 2005. SBC eventually became AT&T in late 2005, and the AT&T name was applied for the service.