- •U n I t 1 telecommunications
- •1 Read and memorize the following words and word-combinations:
- •2 Translate the following word-combinations into English:
- •Telecommunication
- •1 Find in the text English equivalents to the following Russian words and word combinations:
- •6 Fill the blanks using the words below:
- •Telephone
- •1 Using the text give derivatives from the following words and translate them into Russian:
- •2 Fill the blanks using the words below:
- •3 Answer the following questions:
- •4 Translate the following sentences from English into Russian:
- •5 Read the text, describe the principal of telephone communication
- •Radio communications
- •1 Answer the following questions:
- •3 Choose from part II the appropriate continuation of the sentences.
- •4 Translate without using a dictionary.
- •5 Look at the following short descriptions of processes:
- •1 Using the information from the first three texts translate the following one from Russian into English.
- •U n I t 2 modulation
- •1 Read and memorize the following words and word-combinations:
- •2 Translate the following word-combinations into English:
- •Modulation
- •1 Answer the following questions:
- •2 Reply to the following sentences with a suitable question:
- •3 Translate the following fragment into English using the information from the text.
- •4 Make up a summary of the text using the cliché:
- •Digital and analog modulation methods
- •1 What do the following abbreviations stand for?
- •2 Translate the following sentences into English:
- •3 Choose from part II the appropriate continuation of the sentences.
- •4 Read the following paragraph. Fill in each blank with a suitable word given below.
- •5 Translate without using a dictionary
- •6 Make a brief summary of the text.
- •Modulator and demodulator
- •1 Translate the following word-combinations into Russian:
- •2 Answer the following questions:
- •3 Read the following paragraph. Fill in each blank with a suitable word given below.
- •4 Translate without using a dictionary.
- •1 Using the information from the first three texts translate the following one from Russian into English.
- •Модуляция и помехоустойчивое кодирование
- •U n I t 3
- •1 Read and memorize the following words and word-combinations:
- •2 Translate the following word-combinations into English:
- •Transmission systems
- •1 Answer the following questions:
- •2 Complete the following simple process description of the function of a terminal repeater station:
- •3 Complete the following tree diagram:
- •4 Read the following paragraph. Fill in each blank with a suitable word given below.
- •Why optical fibers are useful and how they work
- •1 Below are the advantages of optical fibers. Match them with an appropriate explanation:
- •2 Discuss the importance of the above advantages in using optical fiber in public telephone networks. Try to rank the above advantages in order of importance.
- •3 Complete the following tables:
- •4 Read the following paragraph. Fill in each blank with a suitable word given below.
- •5 Reply to the following sentences with a suitable question:
- •6 Make a brief summary of the text.
- •1 Answer the following questions:
- •2 Read the following paragraph. Fill in each blank with a suitable word given below.
- •3 Translate the following sentences into English:
- •1 Using the information from the first three texts translate the following one from Russian into English.
- •Оптоволокно
- •U n I t 4
- •1 Read and memorize the following words and word-combinations:
- •2 Translate the following word-combinations into English:
- •Telephone exchanges
- •1 Answer the following questions:
- •2 Complete the following table: Main characteristics of the systems
- •3 Choose from part II the appropriate continuation of the sentences.
- •4 Put the verb in brackets into the correct tense.
- •5 Read the following paragraph. Fill in each blank with a suitable word given below.
- •6 Make up a summary of the text using the cliché:
- •Switching technologies
- •1 Integrated Digital Transmission and Switching
- •1 Complete the following table:
- •3 What are the advantages of using (large-scale) integrated circuits in an exchange?
- •4 Match the following terms with a suitable explanation:
- •5 Translate the following sentences into Russian:
- •Public Data Networks
- •1 Answer the following questions:
- •2 Match the facilities with the appropriate description:
- •3 Discuss in what situations and for which user groups the above facilities would be useful.
- •1 Using the information from the first three texts translate the following one from English into Russian.
- •Digital switches
- •Оглавление
- •Английский язык
- •246653, Г. Гомель, ул. Кирова, 34.
- •Английский язык
- •246653, Г. Гомель, ул. Кирова, 34.
Radio communications
Communicating by radio is a method of sending sounds, pictures and data through the air by means of electrical waves.
We use the airwaves for many purposes: broadcasting most of our local and national radio and TV stations, in our mobile radio and telephone services, and to communicate on a global scale through distant satellites,, which act as a kind of reflector in the sky, redirecting the information we send up to them.
Another important use of this means of communicating is in shipping. A ship that is in difficulty can call the nearest coast station, giving details of its situation and, if necessary, ask for help. We call this ‘ship-to-shore’ radio. Radio can ensure greater safety in navigation (for example, to warn of bad weather or of hazards in the shipping lanes) and it enables large amount of information to be sent over land or water without the support of several hundred kilometers of wires and cables. Radio networks can, therefore, be cheaper to install but often have fewer circuits than cable links. Radar systems also enable air-traffic controllers to follow and guide the flight paths of planes from take-off to landing.
Radio-paging systems enable us to be contacted even though we do not have a telephone within easy reach. It is a way of letting us know that something important has just happened and that we must act quickly. The system works through a pager or ‘bleeper’, a small receiver about the size of a packet of cigarettes, which you can keep in your pocket. When people want to contact you, they simply pick up the nearest telephone; dial your personal paging number free of charge, and wherever you are in the coverage area, your pager bleep. (You must, however, be above, not below, ground level; for the signal will not get through if you are underground.) The bleeper informs you that someone is calling you. You can identify up to four callers on some types of equipment. The most modern type of radio-pager displays the number of the telephone the caller is ringing from. The main advantage of radio-paging is that you can be contacted wherever you are, even though you may be a long way from a telephone set.
Many companies which have personnel on business trips have found that radio-paging improves their competitive position and allows them to be more responsive to a lot of their customers’ needs. It also increases company efficiency by cutting out many unnecessary and expensive journeys that are sometimes made by salesmen. This saves time and fuel costs. Doctors can be contacted immediately and return to their surgery or hospital, thus possibly saving the life of a very sick patient.
1 Answer the following questions:
1 How does the text define radio communications?
2 What examples does the text give of radio communications?
3 Why can radio networks be cheaper to install?
4 What equipment does the radio-paging user need?
5 Where does the user keep this equipment?
6 Where must you not go if you wish to be contacted by radio-paging?
7 How can companies benefit from radio-paging?
8 Why do many doctors carry a bleeper?
2 Read the following dialogue and put in suitable questions. The information after each blank will help you decide what the question should be. In the dialogue, Chris Bradley (CB) is talking on the phone to Tom Davies (TD) about Bradfield Electronics’ radio-paging system.
CB: Good morning. Bradfield Electronics. Research Division.
TD: 1 …
CB: Chris Bradley speaking.
TD: Hello Chris. It’s Tom Davies from Swanford Tools here.
CB: 2
TD: I’m very well, thanks. I’m phoning about your latest radio-paging system. I’d like a bit more information.
CB: 3 …
TD: there’s quite a lot. I’d like to know, actually.
CB: OK, off you go!
TD: 4…
CB: No, very little. Just a small device called ‘a pager’ or ‘bleeper’.
TD: 5 …
CB: In his pocket, because it’s very small.
TD: 6 …
CB: Oh, about the size of a packet of cigarettes.
TD: 7 …
CB: He’s simply telephoned in the normal way and the pager bleeps.
TD: 8 …
CB: Nothing. It’s free of charge.
TD: 9 …
CB: No, it doesn’t. The user must remain at or above ground level.
TD: 10 …
CB: Not at all. The quarterly rental’s only about £ 30.
TD: 11 …
CB: No problem at all. We’ve got a large amount in stock.
TD: 12 …
CB: No, fine. We could organize a demonstration next week. Would next Thursday at 2 p.m. be alright for you?
TD: 13 …
CB: Good.
14 …?
TD: No, there’ll be several other people with me, mainly from the Sales Department.
CB: 15 …
TD: Of course. It’s 53260. Extension 208.
CB: Good. I look forward to seeing you next Thursday at 2 p.m.
TD: 16 …
CB: Yes. Come straight up. My office is on the second floor.
TD: Fine. Goodbye Chris.
CB: Bye Tom.