中文  |  English  |  Español  |  Français  |  Русский
 
خريطة الموقع اتصل بنا صيغة للطباعة
ITU الاتحاد الدولي للاتصالات
صفحة الاستقبال : قطاع الاتصالات الراديوية : معلومات : [1906 - ITU-R Almanac for 100 Years of ITU Radio Regulations]  
  قطاع الاتصالات الراديوية (ITU-R)
[1906 - ITU-R Almanac for 100 Years of ITU Radio Regulations]

[The first International Radiotelegraph Conference held in 1906 in Berlin signed the first International Radiotelegraph Convention, and the annex to this Convention contained the first regulations governing wireless telegraphy. These regulations, which have since been expanded and revised by numerous radio conferences, are now known as the Radio Regulations]

[The Radio Regulations apply to frequencies ranging from 9 kHz to 400 GHz, and now incorporate over 1 000 pages of information describing how the spectrum may be used and shared around the globe. In an increasingly 'unwired' world, some 40 different radio services now compete for spectrum allocations to provide the bandwidth needed to extend services or support larger numbers of users.]

[The 1906 International Radiotelegraph Conference was preceded in 1903 by a radio conference to study the question of international regulations for radiotelegraph communications.]

[Context (1906):]
[Worldwide adoption of the SOS emergency distress signal.
First trials of broadcasting (voice and music) using radiotelephony.]

[

]


 

  للرجوع إلى أعلى الصفحة -  تعليقات - اتصل بنا -  © ITU 2014 حقوق الطبع جميع الحقوق محفوظة
للاتصال بالمسؤول عن هذه الصفحةمنسق الموقع الإلكتروني لقطاع الاتصالات الراديوية
آخر تجديد: 2010-08-23