Applications and infrastructure Definitions

  • D

    Digital Video Broadcasting (DVB)

    Digital Video Broadcasting (DVB) is a set of standards that define digital broadcasting using existing satellite, cable, and terrestrial infrastructures.

  • dipole antenna

    A dipole antenna is a straight electrical conductor measuring 1/2 wavelength from end to end and connected at the center to a radio-frequency (RF) feed line.

  • direct broadcast satellite (DBS)

    Direct broadcast satellite (DBS) refers to satellite television (TV) systems in which the subscribers, or end users, receive signals directly from geostationary satellites.

  • dish antenna

    A dish antenna, also known simply as a dish, is common in microwave systems.

  • distributed antenna system (DAS)

    A distributed antenna system (DAS) is a way to deal with isolated spots of poor coverage inside a large building by installing a network of relatively small antennas throughout the building to serve as repeaters.

  • downlink and uplink

    These terms should not be confused with downstream and upstream.

  • Dropbox

    Dropbox is a cloud storage provider (sometimes referred to as an online backup service) that is frequently used as a file-sharing service.

  • E

    EDGE (Enhanced Data GSM Environment)

    EDGE (Enhanced Data GSM Environment) is a faster version of GSM designed to deliver data at rates up to 384 Kbps and enable the delivery of multimedia and other broadband applications to mobile phone and computer users.

  • EFSS (Enterprise file sync-and-share)

    Enterprise file sync-and-share is a service that allows users to save files in cloud or on-premises storage and then access them on desktop and mobile devices.

  • electromagnetic interference (EMI)

    EMI (electromagnetic interference) is the disruption of operation of an electronic device when it is in the vicinity of an electromagnetic field (EM field) in the radio frequency (RF) spectrum that is caused by another electronic device.

  • end-user computing (EUC)

    End-user computing (EUC) refers to the devices, applications and data that workers need to perform their jobs, and the technologies used to deploy, manage and secure those resources.

  • Enhanced Messaging Service (EMS)

    Enhanced Messaging Service (EMS) is an adaptation of the Short Message Service (SMS) that allows users to send and receive ring tones and operator logos, as well as combinations of simple media to and from EMS-compliant handsets.

  • enterprise app store (enterprise application store)

    An enterprise app store is a web portal through which end users can access, download and install corporate-approved software applications.

  • enterprise-mobile integration (EMI)

    Enterprise-mobile integration (EMI) is a form of fixed-mobile convergence (FMC) that provides integration between communications carriers and enterprise networks... (Continued)

  • ESMR (Enhanced Specialized Mobile Radio)

    Also see Specialized Mobile Radio (SMR).

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