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Information and Communications
Technology Qualifications
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| Prescription: DC500 (DC100)Data Communications |
| Aim of Module | Students will gain an understanding of the facilities and techniques available for the interconnection of computers and peripherals, concentrating on asynchronous communications.
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| Credits | 7
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| Student Learning hours | 70
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| Content Revised | 2000
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| Prescription Expiry Date | Nov 2005
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LEARNING OUTCOMES
The Student Will
| | | | | C | 1 | Describe the developments in data communications. | | | | | C | 2 | Explain signal characteristics and describe various communications media. | | | | | C | 3 | Describe methods used for the provision of data communications channels and the techniques associated with channel utilisation. | | | | | C | 4 | Describe and explain the operation of the physical interface between the Data Terminal Equipment (DTE) and the Data Communications Equipment (DCE). | | | | | C | 5 | Gain a basic understanding of the operation of modems and the various modulation techniques employed to enable data communications over analogue lines. | | | Demonstrations of data communications techniques and facilities should be used whenever practicable. |
CONTENT
| | | | > | The basic components of a communications system will be described in terms of source, medium and sink (receiver). | | | | | | > | The requirements for standards and the development of standards organisations; ie. ITU, ISO, EIA, and IEEE, will be examined.
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| | | | > | Signal characteristics will include the following: | | | | - analogue signal properties; amplitude, frequency and phase | | | | - digital signal properties and their components | | | | | | > | The examination of communications media will include; twisted pair, multiconductor flat, coaxial, and optical fibre cables and wireless; eg. microwave and infrared, and their properties.
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| | | | > | The provision of communications channels will include FDM, TDM and STDM multiplexing techniques. | | | > | Methods of data communications will include modes of operation (simplex, half-duplex and full duplex), serial and parallel transmission, and synchronisation (asynchronous, synchronous, and isochronous).
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| | | | > | The mechanical, electrical, functional and procedural requirements of the ITU-T V, X, and I series recommendations will be described. | | | | | | > | A specific example of an implementation of the V.24/V.28 (EIA 232-D) interface, such as a current Universal Synchronous Asynchronous Receiver Transmitter (USART) and the associated line drivers/receivers, will be examined in block schematic form.
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| | | | > | The purpose of a modem, together with specific modulation techniques, including amplitude, frequency, phase and combinations of these; eg. Quadrature Amplitude Modulation (QAM), will be studied. | | | | | > | The reasons for the use of trellis coding for high-speed modems will be discussed. | | | | | | > | In examining the operation of modems the use of the Hayes commands; eg. auto dial, auto answer, etc, will be explored.
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