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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. Automatic call distributor - Wikipedia

    en.wikipedia.org/wiki/Automatic_call_distributor

    An automated call distribution system, commonly known as automatic call distributor or automatic call dispatcher (ACD), is a telephony device that answers and distributes incoming calls to a specific group of terminals or agents within an organization. ACDs direct calls based on parameters that may include the caller's telephone number, the ...

  5. VoIP phone - Wikipedia

    en.wikipedia.org/wiki/VoIP_phone

    Accounts are usually set and memorized on the phone itself. A more sophisticated feature is dynamic download of account settings, also known as "extension mobility". This feature allows settings stored on a server to be downloaded to the phone, based on user login. The user logs into the phone and that phone becomes the user's extension.

  6. Spatial multiplexing - Wikipedia

    en.wikipedia.org/wiki/Spatial_multiplexing

    Spatial multiplexing or space-division multiplexing (SM, SDM or SMX) is a multiplexing technique in MIMO wireless communication, fiber-optic communication and other communications technologies used to transmit independent channels separated in space.

  7. Voice over IP - Wikipedia

    en.wikipedia.org/wiki/Voice_over_IP

    The susceptibility of phone service to power failures is a common problem even with traditional analog service where customers purchase telephone units that operate with wireless handsets to a base station, or that have other modern phone features, such as built-in voicemail or phone book features.

  8. 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)

  9. Telecommunications device for the deaf - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_device...

    In certain countries, there are systems in place so that a deaf person can communicate with a hearing person on an ordinary voice phone using a human relay operator. There are also "carry-over" services, enabling people who can hear but cannot speak ("hearing carry-over," a.k.a. "HCO"), or people who cannot hear but are able to speak ("voice ...