Тема 27 Комунікаційні системи. - Part 15

1 Прочитайте та перекладіть текст (усно). Напишіть до нього шість запитань (письмово).

ICT systems: components and functions

ICT systems are much more than computers. An ICT system involves the use of computers or other types of hardware to meet a specific need. A LAN, local area network, can be an example of an ICT system, but interactive television and the database of a library are types of systems too. ICT systems have these components: software - instructions and data; hardware - computers and other devices; personnel - people who use, design, control or benefit from the system. The components perform these basic functions: input - the data is collected and entered; processing - data is changed or manipulated; output - the results are shown; communication and feedback - the results are sent out and new data is collected and entered in the system; memory or storage of data.

ICT systems are classified according to their aim:

'In our hospital we have set up an information system to manage data and information about our patients.'

'My house is an example of a control system. Its main aim is to control the different devices, e.g. switches that turn lights on and off as a security measure, sensors that detect smoke and set off the alarms, etc.'

'The Internet is a good example of a communication system; other examples are a mobile phone network or digital television. This type of system is designed for sending data between different devices.'

At present most of the devices used in ICT systems are multi-purpose: mobile phones can be used as digital cameras or agendas, printers are also scanners and faxes. Not only is there media integration in the hardware, but also in the services offered by these telecommunication systems.

Call centres are one example of computer telephony integration where companies use databases and telephones for telemarketing.

Digital television uses digital technology to increase the number of channels and their quality of image. It also enables viewers to interact with the content and provide feedback to the programmer via telephone line, cable or satellite.

Teletext is a text-based information service provided by television companies. It uses part of the TV signal and is visible on sets with suitable decoders.

Faxes or telefaxes use telecommunication technology to send copies of documents through telephone lines.

Radio has also adopted the digital technology DAB, Digital Audio Broadcasting. Most digital radio stations are broadcast together with television signals.

The Internet, a global network of computers, enables users to exchange files, send emails and surf the Web to find information, take part in e-commerce, etc.

2 Підберіть визначення для наступних комунікаційних систем (письмово).

1. the registration system of a university; 2. a robot at a car assembly line; 3. an unmanned spaceship; 4. a radio network; 5. the CIA World Factbook; 6. a video conferencing system;

3 Заповніть пропуски, використовуючи інформацію із вправи 1. (письмово)

1. A new radio communication system. - … . 2. A system that integrates telephones and computer is a … centre. 3. A global system of networks of integrated services. - … . 4. A device used to send and receive exact copies of documents. - … . 5. Similar to interactive TV. - … . 6. Written information you get on your TV screen. - …

4 З’єднайте терміни та їхні визначення (письмово)

1 Fibre-optic cable	a the process of sending a high frequency signal known as a microwave;
2 Earth-satellite transmission	b a cable made from strands of glass that is used for carrying information signals on a beam of light;
3 Video conference	c the process of sending a signal to, or receiving a signal from, a satellite orbiting the Earth;
4 Microwave transmission	d sending public radio and TV signals from one part of the Earth to another, using a communications satellite;
5 Satellite broadcasting	e a meeting between people that are a long distance apart using cameras and display screens connected to a network to allow the people to see and hear each other;

5 З’єднайте проблеми (1 – 9) та поради щодо їх вирішення (a – i) (письмово)

1. 'My printer is producing fuzzy, not clear, printouts.' 2. 'I get a lot of error messages. Some of my files won't open. They're corrupted, damaged.' 3. 'The monitor flickers, the image is unsteady.' 4. 'My optical drive fails: it won't read or write discs.' 5. 'My machine is running very slowly and it shows low memory error messages.' 6. 'My computer is behaving strangely. I think it's got a virus.' 7. 'I get a 401 message: I'm unauthorized, not allowed to enter that website.' 8. 'I've tried to access a website but I get a 404 Not Found message, as if it didn't exist.' 9. 'I try to connect but I get this message: Network connection refused by server.'

a. Haven't you got any antivirus software installed? If I were you, I'd try a free online scan. b. Why don't you reset the refresh rate of your monitor? c. You may have made a mistake while typing your password. You can't access a website if you aren't recognized as a guest. Try typing it again. d. The computer may be overheating. Check there's nothing blocking the flow of air. You should also use a recovery tool to retrieve your files. e. Your system must be running short of memory. You'd better add some more RAM. f. That message shows the web server is busy. Why don't you wait and try again later? g. Your discs or perhaps your lens might be dirty. Use some special disc polish. h. It might mean that the page is no longer on the Internet. Check the URL again. If that doesn't work, you could use a search engine to find similar pages. i. The print heads of your printer must be clogged, obstructed with ink. Run the clean cartridge routine or wipe them with a cloth and distilled water.