test English For telecommunications

test English For telecommunications

Name: Ngày sinh Class: Mã sinh viên Test: English For telecommunications Test (Time: 90 minutes - Do not use dictionary) I Answer the questions, basing on the passage Telephones: Wires and Cables A modern telephone often includes a bell so it can ring and a keypad and frequency generator There is an electronic microphone, amplifier and circuit The mechanical bell is often replaced by a speaker and a circuit to generate a pleasant ringing tone But a regular telephone remains one of the simplest devices ever The telephone network starts in your house A pair of copper wires runs from a box at the road to a box at your house From there, the pair of wires is connected to each phone jack in your house (usually using red and green wires) If your house has two phone lines, then two separate pairs of copper wires run from the road to your house The second pair is usually colored yellow and black inside your house Along the road runs a thick cable packed with 100 or more copper pairs Depending on where you are located, this thick cable will run directly to the phone company's switch in your area or it will run to a box about the size of a refrigerator that acts as a digital concentrator Questions: What does a modern telephone often contain? Where does the telephone network start? What happens if your house has two phone lines? What is the usual colour of the pair of wires connected to the phone jack in your house? How large is a digital concentrator? II Translate the passage into Vietnamese (A modern telephone… red and green wires) III Write complete sentences using the suggested words or phrases There / three major entities / provision / Internet service basic purpose / provide / means / synchronous data transmission Telecommunication / be / transmission / signals over / distance for / purpose/ communication Where line networks / set up / can be / classified / indoor and outdoor Bell / make / lot / inventions / but / telephone / most important IV Translate the following sentences into English Trong thơng tin quang, tín hiệu điện biến đổi thành xung ánh sáng Cáp kim loại sử dụng cho hai loại kênh thoại - tương tự số Các trạm lặp đầu cuối đặt trạm mặt đất hay tổng đài chuyển tiếp Trước lưu lượng truyền mạng Internet chủ yếu thông tin sở văn Mạng LAN đặc biệt hữu dụng công ty, trường đại học… V Write about the importance and usefulness of Internet services (about 100 words) Name: Ngày sinh Class: Mã sinh viên Test: English For telecommunications Test (Time: 90 minutes - Do not use dictionary) I Answer the questions, basing on the passage What is a Satellite? A satellite is basically any object that revolves around a planet The moon is Earth's original, natural satellite, and there are many artificial satellites, usually closer to Earth • The path a satellite follows is an orbit In the orbit, the farthest point from Earth is the apogee, and the nearest point is the perigee • Artificial satellites generally are not produced a lot Most satellites are custom built Yet, the GPS satellites (with over 20 copies in orbit) and the Iridium satellites (with over 60 copies in orbit) • Approximately 23,000 items of space junk which are floating above Earth The actual number varies depending on which agency is counting This online catalog of satellites has almost 26,000 entries! Although anything that is in orbit around Earth is technically a satellite, the term "satellite" is typically used to describe a useful object placed in orbit to perform some specific task We often hear about weather satellites, communication satellites and scientific satellites New words: - perigee: cận điểm, điểm gần trái đất - artificial: nhân tạo - apogee: điểm xa trái đất - custom built: sản xuất theo đơn đặt hàng - orbit: quỹ đạo - space junk: vật thể bay vũ trụ Questions: What is a satellite basically? A satellite is basically any abject that revlves around aplanet What apogee and perigee mean? The apogee is the farthest point from Earth The perigee is the nearest point How many copies of Iridium satellites are there in orbit? The are 60 copies in orbit What is the term "satellite" typically used to describe ? The term "satellite" is typically used to describe a useful … Give one example of artificial satellites Weather satellite, communication satellites… II Translate the passage into Vietnamese (A satellite is basically … 60 copies in orbit) III Write complete sentences using the suggested words or phrases quality / speech transmitted /by satellite / good Quality of speech transmitted by satellite is good technique used / exchange / be / space division switching The technique used in this exchange is known as space division switching data network / consist / number / components /which / interconnected The data network consist of a number of components which are interconnected Today/ telecommunication devices / such as / television / radio / telephone / be / common / many parts / world Today, telecommunication devices such as television radio and telephone are common in many parts of the world 5 Voice communications / seldom / carried by / geosynchronous satellites Voice communications is seldom carried by geosynchronous satellites IV Translate the following sentences into English Các nhà cung cấp dịch vụ cung cấp truy cập Internet The service provider provide to access Internet Nhiệm vụ hệ thống chuyển mạch để thiết lập kênh tạm thời người gọi thuê bao gọi the task of switching systems is to establish a temporary channel between the caller and called subscriber Viễn thơng đóng vai trị quan trọng kinh tế giới Telecom play an important role in the world economy Nguồn sáng ốt phát quang hay laser Light sources can be rather light emitting diodes of laser Một cách phân lọai cáp thông tin theo chất liệu One of the classified information cables is on the material V Write about the history of telephone exchanges (about 100 words) Name: Ngày sinh Class: Mã sinh viên Test: English For telecommunications Test (Time: 90 minutes - Do not use dictionary) I Answer the questions, basing on the passage Perhaps the telephone you have in your house is one of the most amazing devices ever created If you want to talk to someone, all you have to is pick up the phone and dial a few digits You are instantly connected to that person, and you can have a two-way conversation The telephone network extends worldwide, so you can reach nearly anyone on the planet When you compare that to the state of the world just 100 years ago, when it might take several weeks to get a one-way written message to someone, you realize just how amazing the telephone is! Surprisingly, a telephone is one of the simplest devices you have in your house It is so simple because the telephone connection to your house has not changed in nearly a century If you have an antique phone from the 1920s, you could connect it to the wall jack in your house and it would work fine! The very simplest working telephone could only contain three parts and they are all simple: • A switch to connect and disconnect the phone from the network - This switch is generally called the hook switch It connects when you lift the handset • A speaker - This is generally a little speaker • A microphone - In the past, telephone microphones were so simple: carbon granules compressed between two thin metal plates New words: - granules: hạt nhỏ Questions: What you with the telephone if you want to talk to someone? All you have to is pick up the phone and dial a few digits In what way can you realize how amazing the telephone is? When you compare that to the state of the world just 100 years ago How many parts could the very simplest working telephone contain? The are three parts What does a switch do? A switch to connect and disconnect the phone from the network Were telephone microphones in the past complicated: II Translate the passage into Vietnamese.( Perhaps the telephone … the telephone is!) III Write complete sentences using the suggested words or phrases Cellular communications service / systems / be design / serve mobile users Cellular communications service is systems being designed by serve mobile users Stored Program Control / application / data processing and computer techniques / exchange Stored Program Control is the application of data processing and computer techniques to an exchange concentrator / be / to collect traffic / a number / individual subscriber circuits Concentrator is to collect traffic from a number of individual subscriber circuits Computer communication / across / Internet / be one / many examples / telecommunication Computer communication across the Internet is one of many examples of telecommunication Electronic systems / installed / 1870s Electronic systems were installed in 1870s IV Translate the following sentences into English Nói chung hệ thống viễn thông kỹ sư viễn thông thiết kế Telecommunication systems generally designed by telecommunication engineers Trong thông tin quang, có hai loại tách quang: ốt quang pin ốt quang thác In Fibre-optic communication, there are two types of photo detectors The silicon pin photodiode and the silicon avalan the photodiode Các linh kiện gắn mạch in có lỗi, mạch in tháo thay khác vòng vài giây The components are mounted in the circuit and, if error, the circuit can be removed and replaced with other one in a few second Cáp quang có nhiều ưu điểm so với cáp đồng thông thường Optical fibres have several advantages over conventional copper cables Điều xung mã q trình thành tín hiệu số tín hiệu điện thọai tương tự biến đổi Pulse code modulation is the process in which analogue signal is converted digital signal V Write about some advantages of optical fibers (about 100 words) Name: Ngày sinh Class: Mã sinh viên Test: English For telecommunications Test (Time: 90 minutes - Do not use dictionary) I Answer the questions, basing on the passage The basic elements of a telecommunication system are: • a transmitter that takes information and converts it to a signal for transmission • a transmission medium over which the signal is transmitted • a receiver that receives and converts the signal back into usable information For example, consider a radio broadcast In this case the broadcast tower is the transmitter, the radio is the receiver and the transmission medium is free space Often telecommunication systems are two-way and devices act as both a transmitter and receiver or transceiver For example, a mobile phone is a transceiver Telecommunication over a phone line is called point-to-point communication because it is between one transmitter and one receiver, telecommunication through radio broadcasts is called broadcast communication because it is between one powerful transmitter and numerous receivers Signals can either be analogue or digital In an analogue signal, the signal is varied continuously with respect to the information In a digital signal, the information is encoded as a set of discrete values (e.g 1's and 0's) Telecommunications devices convert different types of information, such as sound and video, into electrical or optical signals Electrical signals typically travel along a medium such as copper wire or are carried over the air as radio waves Optical signals typically travel along a medium such as glass fibers When a signal reaches its destination, the device on the receiving end converts the signal back into an understandable message, such as sound over a telephone, moving images on a television, or words and pictures on a computer screen Questions: What are the basic elements of a telecommunication system A transmitter, a transmission, a receiver Why is telecommunication over a phone line called point-to-point communication? Because it is between one transmitter and me receiver How is the information encoded in a digital signal? In digital signal, the information is encoded as a set of discrete values How electrical signals typically travel? They typically travel a long… as tradio waver What does the device on the receiving end to the signal? 10 III Write complete sentences using the suggested words or phrases Why / Strowger / invent / automatic telephone exchange? Why Strowger invent the automatic telephone exchange? In 1948 / transistor / invention Bell Telephone Laboratories In 1948 the transistor was invention Bell Telephone Laboratories Transmission characteristics / satellite links / excellent / and problems / few Transmission characteristics by satellite links are excellent and problems are few There / two secondary centre/ connected / DSC / in Sisley / radio link There are two secondary centre both connected to the DSC in Sisley by radio link Radar systems / also enable / air-traffic controllers / follow / guide / flight paths / planes / take-off / land Radar systems also enable as air-traffic controllers to follow and guide the flight paths of planes from take-off to land 17 IV Translate the following sentences into English Loại vệ tinh quan trọng cho viễn thông vệ tinh vệ tinh địa tĩnh The most important types of satellites for telecommunications satellites are geostationary Rất nhiều cơng ty, tập đồn cá nhân sử dụng Internet thông tin liên lạc Many company, group and personal use internet in communication Giá vệ tinh bắt đầu giảm, kết vệ tinh bắt đầu cạnh tranh với cáp ngầm biển The cost of satellite began to fall steadily and, consequently, satellites have to compete with undersea cables Thiết bị thu tín hiệu, khuyếch đại, đổi tần số sau phát lại gọi thiết bị phát đáp The equipment which receives a signal, amplifies it, changes it is frequency and then transmits it is called a transmitters meet Trong giải pháp này, đường dây nối tập trung kênh tủ cáp sử dụng kỹ thuật số In this solution, the lines between concentrators and cabinets use digital V Write about the importance of English in your life and work (about 100 words) 18 Name: Ngày sinh Class: Mã sinh viên Test: English For telecommunications Test (Time: 90 minutes - Do not use dictionary) I Answer the questions, basing on the passage Advantages of Fiber Optics Why are fiber-optic systems revolutionizing telecommunications? Here are some advantages of optical fibers in comparison to conventional metal wire (copper wire): • Less expensive - Several miles of optical cable can be made cheaper than equivalent lengths of copper wire This saves your provider (cable TV, Internet) and you money • Thinner - Optical fibers can be drawn to smaller diameters than copper wire • Higher carrying capacity - Because optical fibers are thinner than copper wires, more fibers can be bundled into a given-diameter cable than copper wires • Less signal fading - The loss of signal in optical fiber is less than in copper wire • Light signals - Unlike electrical signals in copper wires, light signals from one fiber not interfere with those of other fibers in the same cable This means clearer phone conversations or TV reception • Low power - lower-power transmitters can be used instead of the high-voltage electrical transmitters needed for copper wires • Digital signals - Optical fibers are ideally suited for carrying digital information, which is especially useful in computer networks • Non-flammable - Because no electricity is passed through optical fibers, there is no fire hazard • Lightweight - An optical cable weighs less than a comparable copper wire cable Fiber-optic cables take up less space in the ground • Flexible - Fiber optics are so flexible and can transmit and receive light Questions: Why are fiber-optic systems revolutionizing telecommunications? Because they have some advantages in comparison to conventional metal wire Which can be drawn to smaller diameters? Optical fiber Why can more fibers be bundled into a given-diameter cable? Because optical fibers are thinner Why are they non-flammable? Because no electricity is passed through optical fibers, there is no fire hazard Why optical fibers offer clearer phone conversations or TV reception? 19 Because light signals from one fiber not interfere with those of other fibers in the same cable II Translate the passage into Vietnamese (Why are fiber-optic systems … givendiameter cable than copper wires.) III Write complete sentences using the suggested words or phrases Several factors/ will influence / future developments / VoIP / products / services Several factors will influence in fluence future developments in VoIP products andservices Call charge / mean / cost / telephone call Call charge mean that it is the cost of a telephone call 109 nation/ member/ of INTELSAT 109 nation are member of INTELSAT In analogue line / sound / amplified / regular intervals 20 In analogue line the sound is amplified at regular intervals What / remote data processing mean? What does remote data processing mean IV Translate the following sentences into English Việc phát triển, sản xuất phóng vệ tinh tốn The development production and release of a satellite is very expensive Sai số có nghĩa gọi định tuyến sai Wrong number means that the call can be incorrectly routed Trong chương trình kiểm tra lỗi tả, lỗi hay từ phát hiện, chúng làm bật hình In the spell check program if errors or new words are detected, they are highlighted on the screen Vệ tinh nhận, khuyếch đại tái định hướng thông tin ta gửi lên cho A satellite receiver, amplifiers and redirects the information we send up to it Trong năm gần đây, công nghệ viễn thông phát triển với tốc độ nhanh In recent years telecom technology develope with speed very fast V Write about (about 100 words) the role of telecommunications in society 21 Name: Ngày sinh Class: Mã sinh viên Test: English For telecommunications Test (Time: 90 minutes - Do not use dictionary) I Answer the questions, basing on the passage What are Fiber Optics? Fiber optics (optical fibers) are long, thin strands of very pure glass about the diameter of a human hair They are arranged in bundles called optical cables and used to transmit light signals over long distances If you look closely at a single optical fiber, you will see that it has the following parts: • Core – Thin glass center of the fiber where the light travels • Cladding – Outer optical material surrounding the core that reflects the light back into the core • Buffer coating – Plastic coating that protects the fiber from damage and moisture Hundreds or thousands of these optical fibers are arranged in bundles in optical cables The bundles are protected by the cable’s outer covering, called a jacket Optical fibers come in two types: • Single-mode fibers • Multi-mode fibers Single-mode fibers have small cores and transmit infrared laser light Multimode fibers have larger cores and transmit infrared light from light-emitting diodes (LEDs) Some optical fibers can be made from plastic These fibers have a large core and transmit visible red light from LEDs Because fiber optics have many advantages, you see fiber optics in many industries, most notably telecommunications and computer networks For example, if you telephone Europe from the United States (or vice versa) and the signal is via a communications satellite, you often hear an echo on the line But with transatlantic fiber-optic cables, you have a direct connection with no echoes New words: - strand: sợi dây - bundle: bó - infrared: hồng ngoại - transatlantic: qua đại tây dương Questions: What are optical fibers? How many main parts are there in a single optical fiber? What are they? What is the differences between single-mode fibers and multi-mode fibers? 22 What are special about optical fibers that are made from plastic? Why are fiber optics usec in many industries? II Translate the passage into Vietnamese (Fiber optics (optical fibers) called a jacket.) 23 III Write complete sentences using the suggested words or phrases DGPT / planned / build / national communication infrastructure / meet/ following demands DGPT has planned to build the national communication infrastructure to meet these following demands What / manual system / require /from operators? What did manual system require from operators? digit / telephone exchanges / called / SPC (stored program control), exchanges Our digital telephone exchanges are called SPC, exchanges What / speech / carried / digital switch / converted into? What / speech / carried / digital switch / converted into In / solution, analogue transmission / only used / lines / concentrators / in / cabinets In this solution, analogue transmission is only used for the lines between concentrators an the cabinets IV Translate the following sentences into English Ngày nay, tổng đài SPC có đặc điểm dễ điều khiền thiết bị cấu trúc linh hoạt Today, SPC exchanges exchange are characterized by simple handling of the equipment and flexible structure Anh ta chịu trách nhiệm dự án đại hóa thiết bị họ He is responsible for our modernize devices project Thiết bị giúp khách hàng tiết kiệm chi phí nhiên liệu đáp ứng nhu cầu họ this device can help customers to save fuel costs and meet their needs Một vệ tinh xử lý lượng thơng tin lớn mà gửi vùng rộng lớn trái đất A satellite can handle large amounts of which it can send over vast areas of the Earth Mạng thuê bao chia thành mạch thuê bao, mạch trung cấp mạch sơ cấp The local network is divided into the subscriber circuit, the secondary circuit and the primary circuit 24 V Describe what you in your work and mention the technical equipment you often usein your work (about 100 words) 25 Name: Ngày sinh Class: Mã sinh viên Test: English For telecommunications Test (Time: 90 minutes - Do not use dictionary) I Answer the questions, basing on the passage Remote access The Internet allows computer users to connect to other computers and information stores easily, wherever they may be across the world They may this with or without the use of security technologies, depending on the requirements This is encouraging new ways of working from home, collaboration and information sharing in many industries An accountant sitting at home can audit the books of a company based in another country Some of these examples were possible before the widespread use of the Internet, but the cost of private, leased lines would have been very high An office worker away from his desk, perhaps the other side of the world on a business trip or a holiday, can “open” his normal office PC using a secure Virtual Private Network (VPN) connection via the Internet This gives him complete access to all his normal files and data, including e-mail and other applications, while he is away New words: - collaboration: cộng tác - audit: kiểm tra sổ sách - accountant: nhân viên kế toán - leased lines: kênh thuê riêng Questions: What does the Internet allow computer users to do? The Internet allows ………….they may be across the world What is being encouraged by using Internet? This is encouraging new ways……………… sharing in many industries What was the disadvantage of private, leased lines? Can an officer away from his desk “open” his normal office PC? Yes, he can How can he it? II Translate the passage into Vietnamese (This is encouraging while he is away.) 26 III Write complete sentences using the suggested words or phrases BASIC / developed / help students BASIC is developed to help students New / electronic exchange / just / be installed New electronic exchange has just been be installed Strowger exchange / not / noisy as/ crossbar central office Strowger exchange is not as noisy as a crossbar central office Processor / central component / computer system Processor is central component of the computer system Computers / can deal / different kinds / problems Computers can deal with different kinds of problems IV Translate the following sentences into English Những tổng đài điện thoại hứa hẹn tốc độ chuyển mạch nhanh 27 These telephone exchanges engage a higher switching speed Chúng ta sử dụng sóng vơ tuyến cho nhiều mục tiêu khác We use radio waves for many different tastes Khi ông lắp đặt hệ thống tổng đài mới? When will you install a new exchange system? When the he will install a new system switchboard? Ngày có nhiều lĩnh vực sử dụng máy tính làm cơng cụ dạy học Today, many fields use computer as a teaching tool Chiếc vệ tinh định vị đường xích đạo độ cao 35.800 km The satellite positioned over the equator at a height of 35800km V What you know about telecommunications services in Vietnam and how you think to improve them (about 100 words) 28 Name: Ngày sinh Class: Mã sinh viên Test: English For telecommunications Test 10 (Time: 90 minutes - Do not use dictionary) I Answer the questions, basing on the passage Telecommunication is the transmission of signals over a distance for the purpose of communication In modern times, this process almost always involves the sending of electromagnetic waves by electronic transmitters but in earlier years it may have used smoke signals, drums Today, telecommunication is widespread and devices that assist the process, such as the television, radio and telephone, are common in many parts of the world There is also vast networks that connect these devices, including computer networks, public telephone networks, radio networks and television networks Computer communication across the Internet, such as e-mail and instant messaging, is just one of many examples of telecommunication Telecommunication systems are generally designed by telecommunication engineers Some of them are Alexander Bell who invented the telephone (as we know it), John Logie Baird who invented the mechanical television and Guglielmo Marconi who first demonstrated transatlantic radio communication In recent times, optical fibre has improved the bandwidth available for Intercontinental communication, helping to bring faster Internet services Telecommunications is an important part of the world economy New words: - drums: trống - transatlantic: qua đại tây dương - intercontinental: liên lục địa - vast: rộng lớn - mechanical Questions: What is telecommunication? Telecommunication is the transmission of signals over a distance for the purpose of communication What were used to communicate over a long distance in earlier years? Smoke signals, drums What are some networks that connect telecommunication devices? computer networks, public telephone networks Mention some telecommunication engineers and their inventions Alexander Bell who invented… radio communication What has optical fibre improved? 29 It has improved the bandwidth available for Intercontinental communication, helping to bring faster Internet services II Translate the passage into Vietnamese (Telecommunication is the transmission many examples of telecommunication.) III Write complete sentences using the suggested words or phrases Over / last few years /electromechanical exchanges / begin / disappear Over the last few years the electromechanical exchanges have begin to disappear 1891, Almon Strowger / undertaker / Kansas / patented / Strowger switch In 1891, Almon Strowger, an undertaker from Kansas patented Strowger switch What / capability / of / DSE? What are the capability of the DSE Subscriber / informed / cost / of / call / on / completion The subscriber is informed of the cost of a call on completion Optical fiber /signal fades less / so that / repeaters / can / more widely spaced Optical fiber makes thesignal fades less so that repeaters can be more widely spaced 30 IV Translate the following sentences into English Vệ tinh quỹ đạo tầm thấp có tác dụng viễn thông Low orbit satellites are of little use for telecommunications DCE cung cấp giao diện chuẩn DTE mạng DCE provides a standard interface between the DTE and the network Thiết bị đầu cuối liệu bao gồm gì? What are data terminal equipment consist of Điện thoại phát minh quan trọng Graham Bell The phone is the most important invention of Graham Bell Cơ nối máy cho tới ông Barker không? she could connect me with Mr Barker is not? V A foreign investor want to know about your company / post office You introduce it to him/ her (about 100 words) 31 ... Name: Ngày sinh Class: Mã sinh viên Test: English For telecommunications Test (Time: 90 minutes - Do not use dictionary) I Answer the questions, basing... Name: Ngày sinh Class: Mã sinh viên Test: English For telecommunications Test (Time: 90 minutes - Do not use dictionary) I Answer the questions, basing... Name: Ngày sinh Class: Mã sinh viên Test: English For telecommunications Test (Time: 90 minutes - Do not use dictionary) I Answer the questions, basing