Elements of Communication System

1.    Communications systems

Communications systems have four basic elements

a)    Sending and receiving devices

•  Often a computer or specialized communications device.

b)    Communication channel (aka transmission medium)

•   The actual connection that carries the message
•    Can be a physical wire, or a wireless connection

c)     Connection Device (aka communications device

•    Act as an interface between the sending and receiving devices.  They convert outgoing messages into a digital format, and back again at the receiving (incoming) end.

d)    Data transmission specifications

• The rules and procedures that coordinate the sending and receiving devices by precisely defining how the message will be sent across the communication channel.