9787548205562 - sdh光传输网络技术教程 (1 risultati)
Editore: China Press, 2000
- Brossura
Da: liu xing, Nanjing, JS, Cinaliu xing
Contatta il venditoreVenditore con 5 stelleCondizione: Nuovo
EUR 51,48
EUR 15,61 spedizioneSpedito da Cina a U.S.A.Quantità: 1 disponibili
paperback. Condizione: 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 re…lated 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.
