{"id":2976,"date":"2018-07-22T16:03:19","date_gmt":"2018-07-22T13:03:19","guid":{"rendered":"http:\/\/alshareefgroup.com\/?p=2976"},"modified":"2019-02-02T21:55:27","modified_gmt":"2019-02-02T18:55:27","slug":"dmr-digital","status":"publish","type":"post","link":"https:\/\/alshareefgroup.com\/sa\/dmr-digital\/","title":{"rendered":"Digital Mobile Radio Association"},"content":{"rendered":"

DMR Digital Mobile Radio<\/p>\n

Digital Mobile Radio (DMR) is an international digital radio standard developed by the European Telecommunications Standards Institute (ETSI), and first ratified in 2005. More than a decade ago, vendors and users of radio systems recognized that the existing analog trunking standards required updates with modern techniques to provide:<\/p>\n

    \n
  1. Improved voice quality<\/li>\n
  2. Improved functionality such as Location information)<\/li>\n
  3. Improved security (i.e. Authentication and Encryption)<\/li>\n
  4. Improved channel efficiency (2 slot TDMA)<\/li>\n<\/ol>\n

    As a result, today, we have a complete set of standards which cover voice, data services, and conformance testing.
    \nDMR aims to provide an affordable, low-complexity digital standard to replace analog radio.<\/p>\n

    The ETSI DMR Standard defines three different tiers :<\/p>\n

      \n
    • Tier I<\/strong>(unlicensed): DMR equipment works in Direct Mode (unit-to-unit) on public frequencies. Tier 1 DMR devices are best for individuals, recreation, small retail, or other situations that do not require wide area coverage.<\/li>\n
    • Tier II<\/strong>(licensed conventional): This Tier is aimed to be a direct replacement for the analog conventional radio system. These DMR systems operate under individual licenses working in Direct Mode (unit-to-unit) or using a Base Station (BS) for repeating. It has a degree of wide-area coverage and is targeted at users \u201cwho need spectral efficiency, advanced voice features and integrated IP data services in licensed bands for high-power communications.\u201d<\/li>\n
    • Tier III<\/strong>(licensed trunked): DMR trunking systems operate under individual licenses with a controller function that automatically regulates the communications. It also supports packet data services in a variety of formats, including support for IPv4 and IPv6. It is ideal for organizations looking to migrate from MPT-1327\/EADS\/LTR (logic trunked radio) systems or who want the full benefits of managed trunking, voice and data solution.<\/li>\n<\/ul>\n

      \"\" \"\"<\/p>\n

      \"\"<\/p>\n

      We supply DMR technology from the leading global manufacturers like:<\/p>\n

      HYTERA ,\u00a0Motorola ,Tait ,Sepura<\/p>\n<\/div>

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