Slide 1

IntroductionTelecommunication System

Ir. Muhamad Asvial, MSc., PhDCenter for Information and Communication Engineering Research (CICER)

Electrical Engineering Department - University of IndonesiaE-mail: asvial@ee.ui.ac.id

http://www.ee.ui.ac.id/cicer

Slide 2

Components of a Telecommunications System

Figure 1-1

Slide 3

• Transmit information

• Establish interface between sender and the receiver

• Route messages along most efficient paths

Functions of Telecommunications Systems

Slide 4

• Perform elementary processing of information

• Perform editorial tasks on data

• Convert message speed or format

• Control flow of information

Functions of Telecommunications Systems

Slide 5

• Twisted wire: Telephone systems

• Coaxial cable: Cable television

• Fiber optics and optical networks: Dense wave division multiplexing (DWDM)

Communications Channels

Slide 6

• Wireless transmission: Microwave, Satellites, Paging systems, Cellular telephones, Personal communication Services, Personal digital assistants, Mobile data networks

• Transmission: Baud, bandwidth

Communications Channels

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Frequency Ranges for Communications Media and Devices

Figure 1-2

Slide 8Figure 1-3

Satellite Transmission System

Slide 9

• Front-end processor: Manages communications for the host computer

• Concentrator: Collects and temporarily stores messages

• Controller: Supervises communication traffic

• Multiplexer: Enables single communication channel to carry data transmissions

Communications Processors and Software

Slide 10

regulation

Network Products/Services and Market

• Requirements for successful telecommunication product/service development:– cost effective implementation– regulations must allow

and support implementation

– there must be a market• already existing• create a market!

– for commercial implementation– designer should know &

listen customers– designer must understand technology– there must be usability in design

technology

market

standards

Ref: [6, Part II] pp. 43