telecomunicação wikipedia - EAS
- 查看更多內容檢視所有 Wikipedia
According to Article 1.3 of the Radio Regulations (RR), telecommunication is defined as « Any transmission, emission or reception of signs, signals, writings, images and sounds or intelligence of any nature by wire, radio, optical, or other electromagnetic systems .». This definition is identical to those contained in … 查看更多內容
Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication … 查看更多內容
The word telecommunication is a compound of the Greek prefix tele- (τῆλε), meaning distant, far off, or afar, and the Latin … 查看更多內容
Modern telecommunication is founded on a series of key concepts that experienced progressive development and refinement in a period of well over a century:
Basic elements 查看更多內容Many countries have enacted legislation which conforms to the International Telecommunication Regulations established by … 查看更多內容
Beacons and pigeons
Homing pigeons have been used throughout history by different cultures. Pigeon post had Persian roots and was later used by the … 查看更多內容Telecommunication has a significant social, cultural and economic impact on modern society. In 2008, estimates placed the telecommunication industry's revenue at US$4.7 trillion … 查看更多內容
Worldwide equipment sales
According to data collected by Gartner and Ars Technica sales of main consumer's telecommunication equipment worldwide in millions of units was:
Telephone
In a telephone … 查看更多內容CC-BY-SA 授權下的維基百科文字 Telecomunicações – Wikipédia, a enciclopédia livre
- 查看更多內容
Telecomunicación - Wikipedia, la enciclopedia libre
Rede de telecomunicações – Wikipédia, a enciclopédia livre
Sistemas de telecomunicações – Wikipédia, a enciclopédia livre