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  2. Digital mobile radio - Wikipedia

    en.wikipedia.org/wiki/Digital_mobile_radio

    Digital mobile radio. Digital mobile radio (DMR) is a digital radio standard for voice and data transmission in non-public radio networks. It was created by the European Telecommunications Standards Institute (ETSI), [1] and is designed to be low-cost and easy to use. DMR, along with P25 phase II and NXDN are the main competitor technologies in ...

  3. Windows Media DRM - Wikipedia

    en.wikipedia.org/wiki/Windows_Media_DRM

    Windows Media DRM or WMDRM, is a Digital Rights Management service for the Windows Media platform. It is designed to provide delivery of audio or video content over an IP network to a PC or other playback device in such a way that the distributor can control how that content is used. WMDRM includes the following components: Windows Media Rights ...

  4. Trunked radio system - Wikipedia

    en.wikipedia.org/wiki/Trunked_radio_system

    A trunked radio system is a two-way radio system that uses a control channel to automatically assign frequency channels to groups of user radios. In a traditional half-duplex land mobile radio system a group of users (a talkgroup ) with mobile and portable two-way radios communicate over a single shared radio channel, with one user at a time ...

  5. Software-defined radio - Wikipedia

    en.wikipedia.org/wiki/Software-defined_radio

    Software-defined radio ( SDR) is a radio communication system where components that conventionally have been implemented in analog hardware (e.g. mixers, filters, amplifiers, modulators / demodulators, detectors, etc.) are instead implemented by means of software on a computer or embedded system. [1] While the concept of SDR is not new, the ...

  6. Digital private mobile radio - Wikipedia

    en.wikipedia.org/wiki/Digital_private_mobile_radio

    dPMR or digital private mobile radio, is a common air interface for digital mobile communications. dPMR is an open, non-proprietary standard that was developed by the European Telecommunications Standards Institute (ETSI) and published under the reference ETSI TS 102 658. A simplified version of the dPMR protocol intended for licence-free ...

  7. Windows Contacts - Wikipedia

    en.wikipedia.org/wiki/Windows_Contacts

    Windows Contacts. Windows Contacts is a contact manager that is included in Windows Vista, Windows 7, Windows 8, Windows 10, and Windows 11. It replaced but retains most of the functionality of Windows Address Book and worked with Windows Live Mail and the Vista version of Windows Mail . Windows Contacts uses an XML -based schema format.

  8. Microsoft Configuration Manager - Wikipedia

    en.wikipedia.org/.../Microsoft_Configuration_Manager

    Microsoft Configuration Manager. Microsoft Configuration Manager (ConfigMgr) is a systems management software product developed by Microsoft for managing large groups of computers providing remote control, patch management, software distribution, operating system deployment, and hardware and software inventory .

  9. Professional mobile radio - Wikipedia

    en.wikipedia.org/wiki/Professional_mobile_radio

    The simplest systems operate with all the radios on a frequency channel being able to hear all the calls being made. In some applications this may not be desirable and a system of selective calling may be required, in which two radios on a channel can have a private conversation which is not received by the others, or in which a specific radio can be promptly contacted and made to "ring ...

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