Telecommunication Equipment

As one of the first Chinese telecoms equipment provider to pursue business in overseas markets, ZTE now has about 50,000 employees and 8,000 of them are working in about 100 representative offices around the world. Since 1996, the company has provided products and services to 135 countries and regions, serving major telecoms operators in Asia Pacific, South Asia, North America, Europe, Latin America, Africa and the Commonwealth of Independent States. Through a combination of strategic marketing, product differentiation, cost advantage improvement, human resources optimization and intellectual property management, ZTE has established firm commercial partnerships with over 500 operators around the world.

Data transmission is the physical transfer of data over a point-to-point or point-to-multipoint communication channel. Examples of such channels are copper wires, optical fibers, wireless communication channels, and storage media. The data is often represented as an electro-magnetic signal, such an electrical voltage signal, a radiowave or microwave signal or an infra-red signal. Data transmitted may be a digital bit stream originating from a data source, for example a computer or a keyboard. It may also be an analog signal such as a phone call or a video signal, digitized into a bit-stream for example using pulse-code modulation (PCM) or more advanced source coding (data compression) schemes. This source coding and decoding is carried out by codec equipment.

Data (mainly but not exclusively informational) has been sent via non-electronic (e.g. optical, acoustic, mechanical) means since the advent of communication. Analog signal data has been sent electronically since the advent of the telephone. However, the first data electromagnetic transmission applications in modern time were telegraphy (1809) and teletypewriters (1906), which are both digital signals. The fundamental theoretical work in data transmission and information theory by Harry Nyquist, Ralph Hartley, Claude Shannon and others during the early 20th century, was done with these applications in mind.

Data transmission is utilized in computers in computer buses and for communication with peripheral equipment via parallel ports and serial ports such us RS-232 (1969), Firewire (1995) and USB (1996). The principles of data transmission is also utilized in storage media for Error detection and correction since 1951. Data transmission is utilized in computer networking equipment such as modems (1940), local area networks (LAN) adapters (1964), repeaters, hubs, microwave links, wireless network access points (1997), etc.