Vendeur : liu xing, Nanjing, JS, Chine
paperback. Etat : New. Language:Chinese.Paperback. Pages. Number: 158 the 1980s. optical fiber communications have been widely used in the field of communications and information. to solve the problem of a standard optical interface. the AT & T Bell Laboratories. Synchronous Optical Network SONET. With the development of related technologies and user needs change. the early application of quasi-synchronous digital hierarchy (PDH. Plesiochr0.nous Digital Hierarchy) no longer meet the requirements of modern informati. N° de réf. du vendeur MX5390
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