A network of wide area that connects systems in a large geographic area (a country).
Published in Chapter:
Synchronous and Asynchronous Communication Systems
António D. Reis (Universidade da Beira Interior, Portugal, and Universidade de Aveiro, Portugal), José F. Rocha (Universidade de Aveiro, Portugal), Atilio S. Gameiro (Universidade de Aveiro, Portugal), and José P. Carvalho (Universidade da Beira Interior Covilhã, Portugal)
Copyright: © 2008
|Pages: 10
DOI: 10.4018/978-1-59904-885-7.ch210
Abstract
This article talks generically about telecommunication systems. A telecommunication system involves a transmitter, a transmission medium, and a receiver. The type of communication between the transmitter and the receiver can be the synchronous transmission mode or the asynchronous transmission mode. Synchronous communication is sending data with synchronization to an external clock. The most significant aspect of synchronous communication is that the transmitter and receiver clocks are dependent and synchronized. The synchronous communication is a transmission technique that is widely used in telecommunications. Asynchronous communication is sending data without synchronization to an external clock. The most significant aspect of asynchronous communication is that the transmitter and receiver clocks are independent and are not synchronized. The synchronous communication is a transmission technique, which is widely used in personal computers, providing connectivity to printers, modems, fax machines, and so forth.