SS1 Third Term Computer Studies Lesson Note – Communication Systems

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WEEK 3

TOPIC:  COMMUNICATION SYSTEMS

CONTENT: 

1. Telecommunications
2. Types of Telecommunication

SUBTOPIC 1: TELECOMMUNICATIONS

Telecommunications is the exchange of information over significant distances using electronic medium such as telephones, cables, telegraph, etc. it is any system that is used for communicating over distances.

A basic telecommunication system consists of three primary units that are always present in some form:

• A transmitter that takes information and convert it to a signal
• A transmission medium, also called the ‘physical channel’, that carries the signal
• A receiver that takes the signal from the channel and converts it back into usable information.

TYPES OF TELECOMMUNICATION SYSTEMS

• Public Switched Telephone Network (PSTN) (Landline)
• Mobile Phone System (GSM)
• Circuit Switched Packet Telephone Systems (CSPT)
• Satellite Telephone System
• Fixed Wireless Telephone System

EVALUATION

1. What is Telecommunication?
2. Highlight the types of telecommunication systems

Sub-Topic 2: PUBLIC SWITCHED TELEPHONE NETWORK (LANDLINE)

PSTN is the network which allows any telephone in the world to communicate. It consists of telephone lines, fibre optic cables, microwave transmission links, cellular networks and any other.

Mobile Phone System (GSM)

This is also known as Global System for Mobile communications (GSM). GSM is a digital cellular phone technology based on time division multiple access (TDMA). GSM digitizes and compresses

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