Communication Systems

• Telecommunication is the processof transmitting or receiving information over a distance by any electrical or electromagnetic medium.
• Information may take the form of voice, video or data.
• The transmission medium carried the signal. For example telephone wire carries a voice signal.
• Synchronous transmission is messages using synchronization bytes instead of start/stop bits to control the transmission.
• Voice and phone communications are example of synchronous communication.
• Asynchronous transmission method is where messages are transmitted in unequal time intervals.
• Transmission is controlled by start and stop bits on each character, rather than by clocking as in synchronous transmission,
• Email is an example of asynchronous transmission.
• Telecommunication medium is anything that carries signals between a sending and receiving device,
• A computer network is a set of computers that are connected and able to exchange data.