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Title: Telephone networks for developing areas
Author: Marazzi, Carlos Amadeo
Awarding Body: University of London
Current Institution: Imperial College London
Date of Award: 1971
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Most of the developing countries do not possess a telephone network sufficient to promote trade, industry and education at the level required for their economic development. In the present work a telephone network specifically intended for such countries has been proposed as the best solution to the problem created by the existing low traffic and the necessity of economic expansion. A description of some existing systems has been made in order to point out. characteristics relevant to their size and application. None of them, however, were designed with the needs of the developing countries in mind, nor do any fit those needs.and conditions. The system proposed here can be built with the existing technology. Moreover, most of its components are already available in the market. The system, including the satellite exchanges, data link, central process;r and controlling program have been described. Special attention has.been paid to the controlling program because it largely determines the signalling between the satellites and the central processor. A simulation language has been written to operate the system under simulation conditions in a large computer. The simulation program has been described in some detail because it is felt that it can be used not only to write and test the controlling program, but to study traffic related problems, such as the influence of the type of of processor, number of digit receivers in the exchanges, and soon, in function of the traffic. Besides selecting the type of network and fore-casting the demand of telephones, a crucial point in the implementation of a network is to find an optimum plan of investment. A method to find such an optimum plan was designed. It has the property of optimizing the invested capital, maintaining the flexibility of admit-ting modifications when the circumstances so require it. For completeness, a model case is described and an optimum investment plan for the imaginary country Teleria is found. The consideration of social weights for the selection of different telephone projects during their period of commissioning is discussed and a satisfactory social welfare function for this purpose is given.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available