1) To comprise2) To carry out3) To type4) To make possible5) To permit6) To go  Упражнение 4. Письменно озаглавьте 1-7 абзацы текста.

1. 
   Telephone Network
   
2. 
   Video conference
   
3. 
   The telex system
   
4. 
   Teletext
   
5. 
   FAX
   
6. 
   A radio paging service
   
7. 
   E-MAIL
   

Упражнение 5. Напишите пересказ этого текста по схеме:  The text is headlined “COMMUNICATIONS SERVICES”.The main idea of the text is to telephone communication technology is used in various spheres of life.The text is divided into 7 logical parts. The first part deals with telephone communication technologies used for two-way transmission of speech.In this part the author states that the signals are switched from one line to another at switched centers known as telephone exchangesThe second part focuses on telephone communication technologies used in video communication.In this part the reader is informed about modern digital telephone networks which can use videophones to transmit video images as well as speech.The third part is centered around the telex system. Упражнение 6. Say whether the statement is true or fa lse: 1. Telephones connected by a network of cables, are commonly used for the two-way transmission of speech. (TRUE)2. The signals are switched from one line to another at switched centers known as base stations. (FALSE)3. Modern digital telephone networks can use videophones to transmit video images as well as speech. (TRUE)4. Public telephone networks aren’t used by many other data communications services. (FALSE)5. Telex can only transmit simple text containing capital letters and punctuation marks. (TRUE)6. High quality formats can be used and it is much faster than telex, operating at speeds up to 1,600 words per minute. (FALSE) Упражнение 7. Read the text again and answer the questions: 1. What for are telephones connected by a network of cables used?  Telephones connected by a network of cables, are commonly used for the two-way transmission of speech.2. What is a public Switching Telephone Network? Telephones connected by a network of cables, are commonly used for the two-way transmission of speech. The signals are switched from one line to another at switched centers known as telephone exchanges. Lines in a small area are switched by local exchanges, local exchanges are connected through trunk exchanges, and trunk exchanges are connected to other countries by international exchanges. Such a system is called a public Switching Telephone Network.3. Is the telex system one of the oldest? Public telephone networks are used by many other data communications services. One of the oldest is the telex system.4. How does the teletext work? This uses VDU terminals to transmit a variety of text and graphics characters.5. Does a facsimile (FAX) system allow the transmission of text, graphics and photographic images? A facsimile (FAX) system allows the transmission of text, graphics and photographic images.6. What makes contacting people on the move possible? Contacting people on the move is possible using a radio paging service.

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