Electronic data processing, Telephone, Equipment and supplies
This report explains the development of a telephone line multiplexer to be used with a computer based personal paging system. The large geographical area coverage made possible by computer processing results in many calls having to cross telephone tariff boundaries. Since system users cannot be expected to pay long distance charges, dedicated lines which cross tariff boundaries must be leased. Multiplexing applied to those leased lines reduces the cost of data transmission, and is, therefore, justified. The design of the multiplexer proceeds from a specification set which is derived from user response requirements. Fundamentally, the response consists in advising the user, within a reasonable time, that a "page" has been accepted by the system. The specification set is then partitioned into functional blocks which are modeled using flow charts and state diagrams. Logic design follows directly from the models. Production of the multiplexer is followed by field installation. The savings resulting from the multiplexing are considerable.
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Petrasko, Brian E.
Master of Science (M.S.)
College of Engineering
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Masters Thesis (Open Access)
Electronic data processing, Telephone -- Equipment and supplies
Stangel, James H., "Development of a Sixteen Line Multiplexer" (1973). Retrospective Theses and Dissertations. 77.
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