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  2. 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.

  3. List of telephone switches - Wikipedia

    en.wikipedia.org/wiki/List_of_telephone_switches

    The system never achieved the reputation of the CX product due to problems with poor contact pressure in the interconnection relays. Despite its much lower cost of production and installation, the level of maintenance required to keep these systems on good order doomed this variation of the CX design.

  4. 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.

  5. 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.

  6. Peer-to-peer file sharing - Wikipedia

    en.wikipedia.org/wiki/Peer-to-peer_file_sharing

    Peer-to-peer file sharing is the distribution and sharing of digital media using peer-to-peer (P2P) networking technology. P2P file sharing allows users to access media files such as books, music, movies, and games using a P2P software program that searches for other connected computers on a P2P network to locate the desired content. [1]

  7. 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.

  8. 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 ...