Advanced Mobile Phone System

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Advanced Mobile Phone System inglizcha: Advanced Mobile Phone System 825 dan 890 MGts chastota oraligʻida analog mobil standarti. Rivojlangan mobil telefon xizmati (AMPS) Bell Labs tomonidan ishlab chiqilgan, bir yoʻnalishli analog uyali mobil telefon tizimi standart boʻlib, rasman 1983-yil 13-oktabr Shimoliy Amerika da joriy qilingan,[1][2][3].[4] 1987-yildan esa boshqa mamlakatlarda ishga tushgan. NMT-450 tarmogʻiga nisbatan sigʻimi nisbatan yuqori. Shovqin darajasining pastligi sababli Shimoliy Amerikada ishlatilgan.[4]

Manbalar[tahrir]

  1. AT&T Tech Channel (2011-06-13). AT&T Archives : Testing the First Public Cell Phone Network. Techchannel.att.com. 2013-09-28.
  2. Private LineArxivlandi 2012-06-10Wayback Machine saytida. Arxivlandi 2012-06-10Wayback Machine saytida..
  3. MilestonesPastArxivlandi 2011-10-06Wayback Machine saytida. Arxivlandi 2011-10-06Wayback Machine saytida..
  4. 4,0 4,1 Ten years of GSM in Australia. AMTA. Australian Mobile Telecommunications Association (2003). Asl nusxadan arxivlandi (2008-07-20). 2008-08-16. Cite error: Invalid <ref> tag; name "Australian Mobile Telecommunications Association" defined multiple times with different content