Telecommunications Overview

1. Telecommunications Overview Chapter 1

2. Objectives In this chapter, you will learn to: • Define communication and telecommunication • Illustrate components of a communication system • Understand the difference between voice, video, and data • telecommunications • Describe how telecommunication is used in a variety of industries • Identify careers available to telecommunications professionals • Identify the organizations responsible for establishing significant telecommunications standards and policies

3. What is communication? • The Romans used the Latin word communicare when they meant "to make common, to share, or to impart.” • Communication is the sharing of information or messages between two or more entities.

4. Elements of a Communication System • Source - the originator of the message, whether it is a person or machine. • Transmitter - the equipment that modifies the message (either data or voice) into the form required for transmission. • Communications channel - the means of carrying the signal from the source to the destination.

5. Elements of a Communication System • Transmission media - may be physical, like a copper wire or fiber optic cable, or atmospheric, like radio waves. • Receiver - is the device that captures the message from the communications channel and converts it into a form that the person or machine at the destination can understand. • Destination - the person or machine to whom the message is directed

6. Elements of a Communication System

7. Flow of Messages • Simplex - the type of communication in which messages flow in only one direction, from source to destination. • Half-duplex communication - occurs when messages travel in both directions between the source and the destination, but in only one direction at a time. • Full-duplex communication - messages can travel over the communications channel in both directions simultaneously.

8. Flow of Messages

9. Relative Number of Sources and Destinations • One-to-one communication - a single source sends information to a single destination. • One-to-many communication - a single source simultaneously sends information to multiple destinations. • Many-to-many communication - occurs when many sources issue messages to many destinations.

10. Relative Number of Sources and Destinations

11. IQ TEST1 1. True or False: The source is the originator of the message. Answer: True 2. The _____ is the equipment that modifies the message into the form required for transmission. Answer: transmitter 3. _____ communication occurs when messages travel in both directions between the source and the destination, but only in one direction at a time. Answer: Half-duplex 4. The _____ is the device that captures the message from the communications channel and converts it into a form that the person or machine at the destination can understand. Answer: receiver

12. What is Telecommunication? • Communication that spans a distance. • Voice telecommunication - using electrical signals to transmit human voice across a distance, such as telephones and radio broadcasts. • Video telecommunication - the electrically-based transmission of moving pictures and sound across a distance. • Data telecommunication - the use of electrical signals to exchange encoded information between computerized devices across a distance.

13. What is Telecommunication?

14. Voice • The telephony infrastructure includes cross-continental fiber optic cable to facilitate international voice telecommunications and national and regional cabling to connect long distance calls. • It includes numerous local, regional, and national switching centers where phone calls are routed to their destinations by computerized telephone switches. • It also includes local connections (up to three miles in length) to residences and businesses capable of greater connection speed and volume than ever before. • Finally, it includes the sophisticated telephone equipment and applications that users rely on.

15. Data • Telegraph - one of the first data telecommunications inventions, uses wire to convey electrical pulses that represent letters or numbers over a distance. • Newer data telecommunications technology is not only faster, but also ensures better accuracy due to more reliable transmission media and techniques that enable the receiver to monitor the integrity of the data it has received.

16. Data • Present-day data telecommunications technologies include: • Encoded information transmitted over traditional telephone lines • Encoded information saved to fixed media, such as a hard disk, floppy disk, or CD ROM • Encoded information exchanged between two computers that are directly connected by a single cable • Encoded information exchanged by a group of connected computers on a network • Encoded information exchanged by two devices over radio waves

17. Types of Telecommunications Companies • Service providers - those that supply the communications channels for voice and data transmission. • Equipment providers - those that supply the user and connectivity equipment, such as telephones. • The combination of voice, video, and data communication along the same communications channel is called CONVERGENCE

18. Growth of the Telecommunications Industry in Malaysia • The primary regulator of telecommunications in the Malaysia is the Malaysian Communications and Multimedia Commission (MCMC). It issues licenses under the Communications and Multimedia Act 1998, the Postal Services Act 1991 and the Digital Signature Act 1997. • Statistics; Telephones - main lines in use: 4.589 million (2012)Telephones - mobile cellular: 41.325 million (2012)Telephone system: excellent international servicedomestic: good intercity service provided on Peninsular Malaysia mainly by microwave radio relay; adequate intercity microwave radio relay network between Sabah and Sarawak via Brunei; domestic satellite system with 2 earth stationsinternational: submarine cables to India, Hong Kong, and Singapore; satellite earth stations - 2 Intelsat (1 Indian Ocean and 1 Pacific Ocean)

19. Financial Services • Call center - a facility dedicated to fielding customer calls. • Interactive voice response (IVR) system - a method of sending information over the telephone by pressing buttons in response to recorded voice prompts, to answer routine questions. • Automatic call distributor (ACD) - uses computerized devices attached to the phone lines to automatically route calls to specific phone extensions.

20. Financial Services

21. Utilities • Recent deregulation (the introduction of competition for services) in the utilities industry has made telecommunications even more critical to this industry. • To persuade their customers not to choose another utility provider, utility companies must strive harder to please their customers, in part by answering questions as promptly as possible. • An advanced call center at a utilities company typically uses both an ACD and an IVR.

22. Manufacturing • The use of advanced voice, video, and data telecommunications in manufacturing has resulted in faster and more efficient production of goods and at the same time it has also increased global competition. • Supply chain management, an electronic means for connecting a manufacturer with its suppliers and distributors is a notable example of the use of telecommunications in the manufacturing industry.

23. Transportation • Examples of the transportation industry’s use of telecommunications include: • computerized flight control for airport traffic • software that issues maps and directions based on a given starting point and destination • government-sponsored transportation hotlines that inform callers about road construction and hazardous road conditions • systems for suggesting the most efficient route between multiple locations

24. Retail • E-business - the use of data telecommunications to conduct business transactions. • The apparel and sportswear segment of the retail industry uses particularly sophisticated and unique telecommunications technology for their online business. • Before the products even reach a retailer’s point of sale (such as a Web site), telecommunications technology helps with manufacturing, quality control, inventory, distribution, and product shipping.

25. Healthcare • Telemedicine - a field that brings patients and healthcare professionals together by exchanging voice, video, and data over distances when they can’t meet face-to-face. • Improves the quality of healthcare because ailments can often be diagnosed and treated faster. • Also streamlines the record-keeping process for clinicians who spend a great deal of time entering data about their cases.

26. Government and Education • Many government agencies use advanced telecommunications to provide faster and easier access to public services. • Telecommunications also plays a significant role in education. In South Carolina, a large public school district is improving education through distance learning. • Distance learning - the use of telecommunications technology to inform, educate, or train students across distances.

27. New Frontiers for Telecommunications Technology • Fiber optic cable - a transmission media that contains thin strands of fiber in its core and uses pulses of light to convey signals. • Capable of carrying higher amounts of data, voice, or video within a given time span than any other type of media.

28. New Frontiers for Telecommunications Technology cont’d

29. Careers in Telecommunications • No matter what type of telecommunications position you seek, the following will serve you well: • The ability to install, maintain, and troubleshoot the system of cables and wires that carry telecommunications services • A thorough knowledge of the public telephone network, and the carriers and regulations that are part of it • Familiarity with enhanced telephone services (such as IVR and ACD) • A mastery of the basic principles of electricity

30. Careers in Telecommunications • No matter what type of telecommunications position you seek, the following will serve you well: • A clear understanding of how computers accept and interpret data from other computers over a network • The ability to design, install, and troubleshoot basic networks • An understanding of how the Internet works • Familiarity with wireless transmission methods

31. Careers in Telecommunications • Areas within the field of telecommunications that you might consider specializing in: • Networked convergence of voice, video, and data • Electronics and circuit design and engineering • Development of telephony and computer applications • Wireless telephony and networking • Information security

32. Careers in Telecommunications

33. Telecommunications Standard Organization • Standards - documented agreements containing technical specifications or other precise criteria that stipulate how a particular product or service should be designed or performed. • American National Standards Institute (ANSI) - ensures that the test results from one manufacturer can be accurately compared to other manufacturers’ results. • Both ANSI and ITU are involved in setting standards for Integrated Services Digital Network (ISDN) communications.

34. ANSI • The ANSI (American National Standards Institute) - an organization composed of over a thousand representatives from industry and government who together determine standards for the electronics industry. • ANSI does not dictate that manufacturers comply with their standards, but requests them to voluntarily comply.

35. TIA and EIA • The EIA (Electronics Industry Alliance) - is a trade organization composed of representatives from electronics manufacturing firms across the United States. • TIA (Telecommunications Industry Association) - focuses on standards for information technology, wireless, satellite, fiber optics, and telephone equipment.

36. IEEE • IEEE (Institute of Electrical and Electronic Engineers) - an international society composed of engineering professionals. • Its goals are to promote development and education in the electrical engineering and computer science fields.

37. ATIS • ATIS (The Association for Telecommunications Industry Solutions) - a North American trade association made of thousands of companies that provide communications equipment and services. • Its membership reviews emerging technology and agrees on standards and operating procedures to ensure that services and equipment supplied by multiple companies can be easily integrated.

38. ISO • ISO (International Organization for Standardization) - a collection of standards organizations representing 130 countries with its headquarters located in Geneva, Switzerland. • Its goal is to establish international technological standards to facilitate global exchange of information and barrier-free trade.

39. ITU • The ITU (International Telecommunications Union) - a specialized United Nations agency that regulates international telecommunication usage, including radio and TV frequencies, satellite and telephony specifications, networking infrastructure, and tariffs applied to global communication. • Provides developing countries with technical expertise and equipment to advance their technological base.

40. IQ TEST2 1. The _____ system is a method of sending information over the telephone by pressing buttons in response to recorded voice prompts, to answer routine questions. Answer: interactive voice response (IVR) 2. A(n) _____ system uses computerized devices attached to the phone lines to automatically route calls to specific phone extensions. Answer: automatic call distributor (ACD) 3. A facility dedicated to fielding customer calls is known as a(n)_____. Answer: call center

41. Summary • Communication is the conveyance and understanding of meaningful information from one entity to another. • Data telecommunication refers to use of electrical signals to exchange encoded information between computerized devices across a distance. • Within the field of telecommunications, professionals typically divide its services into three categories: voice, video, and data. • The telephone is the primary means of transmitting and receiving voice signals.