Data Communication Media Lesson I
By the end of this lesson you should be able to: To define data communication media Describe different types of bounded communication media
Data communication media refers to the pathway through which data signals are transferred from on place to another. Data Communication media are classified as:
Bounded Communication Media
In this type, data signals are relayed through cables. These media are again divided into :
Two wire open line cables
These are made up of two parallel copper wires separated by a plastic insulator. They are used to transmit voice signals over telecommunication networks. This type of bounded media suffer from EMI as the lines are parallel to each other.
Twisted Pair Cables
These are copper wires wound on each other. The winding/twisting reduces electromagnetic interference and crosstalk. They are divided into:
Unshielded Twisted Pair (UTP)
They are not shielded using braids of copper wire or aluminium foil. They suffer from electromagnetic interference. These interferences may come from lightning sparks, radio signals etc.
Advantages of TP cables
Disadvantages of TP cables
Shielded Twisted Pair (STP)
Here, shielding is done by use braided copper wires and aluminium foil to prevent electromagnetic interference