Tài liệu Introduction to Telecommunications

This course introduces students to modern data communications, including standards, techniques, applications and devices involved in interconnecting computers in both local and wide area networks.
Reference:
Business Data Communications and Networking, 6[SUP]th[/SUP] Edition, by- Fitzgerald and Dennis.

Data Communications:
Data Communications is the movement of computer information (digitized information) from one point to another by means of electrical, electromagnetic or optical transmission systems.
Data communications usually includes only data.

Telecommunications:
Telecommunications is a broader term which includes the transmission of voice, graphics, images and video as well as data.
Dictionary Meaning of the Word Telecommunication:
Tele means distance
Telecommunication means distant communication

Telecommunications refers to long-distance communication (the Greek tele means far off). At present, such communication is carried out with the aid of electronic equipment such as the Radio, Telegraph, Telephone, and Television. In earlier times, however, smoke signals, drums, light beacons, and various forms of semaphore were used for the same purpose. The information that is transmitted can be in the form of voice, symbols, pictures, or data, or a combination of these. The physical equipment for a telecommunications system includes a transmitter, one or more receivers, and a channel or means of communication such as the air, water, wire, cable, communications satellite, or some combination of these.