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  2. Mobile Telephone Switching Office - Wikipedia

    en.wikipedia.org/wiki/Mobile_Telephone_Switching...

    With the subscriber's VLR Profile the MSC can determine the last known LAC/CID for this subscriber and knows which BTS to use when it needs to ring/page that phone for an incoming call. When the MSC gets the call, it checks its database for the location of the phone. Then it picks a frequency pair the phone will use in that cell to take the call.

  3. Vertical Communications - Wikipedia

    en.wikipedia.org/wiki/Vertical_Communications

    Vertical Communications, Inc. is a corporation that specialized in premises-based private branch exchanges, i.e., business telephone systems.Vertical Communications changed its name on January 1, 2005 from Artisoft, Inc. after acquiring Vertical Networks in September 2004.

  4. Advanced Mobile Phone Service - Wikipedia

    en.wikipedia.org/wiki/Advanced_Mobile_Phone_Service

    Abbreviated AMPS, the company was created in 1978 to build and operate the new Advanced Mobile Phone System, also abbreviated AMPS. AMPS was developed by Bell Labs to replace older, severely limited radiophone services, such as IMTS. AMPS was one of the first modern cellular phone systems, which remained in operation until 2008.

  5. Software-defined mobile network - Wikipedia

    en.wikipedia.org/wiki/Software-defined_mobile...

    Software-defined mobile networking (SDMN) is an approach to the design of mobile networks where all protocol-specific features are implemented in software, maximizing the use of generic and commodity hardware and software in both the core network and radio access network (RAN).

  6. SDM - Wikipedia

    en.wikipedia.org/wiki/SDM

    Scarlet Devil Mansion, a location in the danmaku video-game series Touhou Project; Shared decision-making in medicine; Shoppers Drug Mart, a Canadian pharmacy chain; Slovenian Democratic Youth (Slovene: Slovenska demokratska mladina)

  7. Direct Stream Digital - Wikipedia

    en.wikipedia.org/wiki/Direct_Stream_Digital

    Direct Stream Digital (DSD) is a trademark used by Sony and Philips for their system for digitally encoding audio signals for the Super Audio CD (SACD).. DSD uses delta-sigma modulation, a form of pulse-density modulation encoding, a technique to represent audio signals in digital format, a sequence of single-bit values at a sampling rate of 2.8224 MHz.

  8. Torrent Systems - Wikipedia

    en.wikipedia.org/wiki/Torrent_Systems

    Torrent Systems, originally named Applied Parallel Technologies (APT), was a parallel computing software company founded in 1993 by Edward Zyszkowski, with the first employee being Rob Utzschneider. Torrent received initial funding from the NIST Advanced Technology Program.

  9. Cap Gemini SDM - Wikipedia

    en.wikipedia.org/wiki/Cap_Gemini_SDM

    SDM, SDM2, SDM/70, and Spectrum evolved into system development methodologies that were based on the works of Steven Ward, Tom Demarco, Larry Constantine, Ken Orr, Ed Yourdon, Michael A. Jackson and others, as well as data modeling techniques developed by Thomas Bachmann and Peter Chen. SDM is a top-down model. Starting from the system as a ...