Home > Ingegneria Delle Comunicazioni: Synchronous Digital Hierarchy, Telecomunicazioni, Laser, Comunicazioni in Fibra Ottica(Italian)
Ingegneria Delle Comunicazioni: Synchronous Digital Hierarchy, Telecomunicazioni, Laser, Comunicazioni in Fibra Ottica(Italian)

Ingegneria Delle Comunicazioni: Synchronous Digital Hierarchy, Telecomunicazioni, Laser, Comunicazioni in Fibra Ottica(Italian)

          
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About the Book

Fonte: Wikipedia. Pagine: 46. Capitoli: Synchronous Digital Hierarchy, Telecomunicazioni, Laser, Comunicazioni in fibra ottica, Optical Transport Network, Ingegneria delle telecomunicazioni, Amplificatore ottico, Dispersione ottica, Wavelength Division Multiplexing, Capacita di canale, Dispersione dei modi di polarizzazione, Frequency-shift keying, Quadrature amplitude modulation, Velocita di gruppo, Phase-shift keying, Formula Chen, Data Terminal Equipment, Comunicazioni ottiche, SIP Trunking, Comunicazioni elettriche, Zona di Fresnel, IPoDWDM, Institute of Radio Engineers, Beam splitter, Insertion loss, Alessandro Tosi, Strumento ottico, On-off keying, Sistema di telecomunicazioni, Trellis Coded Modulation, Interferometro di Mach-Zehnder, Strobe, Linea di vista, Reti logiche. Estratto: In telecomunicazioni la Synchronous Digital Hierarchy (Gerarchia Digitale Sincrona), comunemente detta anche SDH, e un protocollo di livello fisico usato per la multiplazione a divisione di tempo e la successiva trasmissione digitale di telefonia e dati in reti di telecomunicazioni geografiche (WAN) su fibra ottica o su cavo elettrico. Le reti che utilizzano tale protocollo a livello fisico vengono dette reti SDH. Il protocollo SDH definisce nel dettaglio le modalita per aggregare (o multiplare), a vari livelli di gerarchie possibili, flussi dati a bit-rate diverse e ritrasmetterli tutti insieme su grandi distanze con tecniche di tipo TDM a interlacciamento di byte (byte interleaving). A differenza della Plesiochronous Digital Hierarchy (Gerarchia Digitale Plesiocrona o PDH), il protocollo SDH si basa sul fatto che tutti gli elementi della rete sono tra loro statisticamente sincronizzati con lo stesso clock con una precisione molto elevata (stessa frequenza e stessa fase). In combinazione a cio, la definizione di una speciale struttura di trama con l'aggiunta di un numero significativo di informazioni di servizio (overhead) permette non solo l'estrazione diretta di un singolo tr...


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Product Details
  • ISBN-13: 9781232013990
  • Publisher: Books LLC, Wiki Series
  • Publisher Imprint: Books LLC, Wiki Series
  • Height: 246 mm
  • No of Pages: 48
  • Series Title: Italian
  • Sub Title: Synchronous Digital Hierarchy, Telecomunicazioni, Laser, Comunicazioni in Fibra Ottica
  • Width: 189 mm
  • ISBN-10: 1232013994
  • Publisher Date: 30 Jul 2011
  • Binding: Paperback
  • Language: Italian
  • Returnable: N
  • Spine Width: 3 mm
  • Weight: 104 gr


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