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CABLAGGIO DI CATEGORIA 8 Per Il Supporto Delle Applicazioni Oltre I 10 Gb/S a Company Costruire il data center del futuro 29 La scelta dell’infrastruttura di cablaggio per 2,5 e 5GBASE-T su rame 36 Connettività Wi-Fi di buon livello, un must per gli Hotel 44 Rivista tecnica sui sistemi e le tecnologie per il trasporto dell’informazione | A cura di SPRING | Anno 8° | gennaio-aprile 2017 | n. 1-2 #TECNOLOGIENEWS gAPPLICAZIONE DI CLOUD ROBOTICS NEI DATA CENTER CABLAGGIO DI CATEGORIA 8 per il supporto delle applicazioni oltre i 10 Gb/s a company 02 cabling&wireless gennaio-aprile 2017 EDITORIALE Duepuntozero Sono stato fortemente indeciso se utilizzare o meno la numerazione 2.0 per descrivere il nuovo corso della rivista Cabling & Wireless che inizia con questo numero. Un primo motivo è legato al fatto che, in generale, non amo utilizzare notazioni se non nello specifico contesto per cui sono nate, un secondo motivo è che non amo seguire le mode. L’espressione duepuntozero è oggi usata ed abusata in mille contesti (perfino in politica!) molte volte senza una stretta correlazione logica con il suo effettivo significato il che lascia dedurre che si tratta, appunto, di una moda. Alla fine ho deciso di adottarla perché, nonostante tutto, è perfetta per descrivere l’operazione di rinnovamento che abbiamo operato sulla nostra rivista all’alba dell’ottavo anno di pubblica- zioni, accompagnando questa scelta con un breve commento che ne giustifica le motivazioni. Le ragioni di quel “2” sono evidenti. La rivista che avete in mano si presenta, già a prima vista, decisamente diversa da quella che siete abituati a leggere. Nuova grafica, nuova impagina- zione, più accattivante, più leggibile, ma non solo: più rubriche, più informazione raccolta e presentata con un’ottica che permetta di cogliere tutte le sfumature di un settore, come quello delle infrastrutture di rete, che evolve e si espande rapidamente interlacciando discipline tradi- zionalmente distinte se non addirittura contrapposte (l’articolo di pagina 36 parla di cablaggio su rame, ma potrebbe benissimo essere collocato nella rubrica dedicata ai sistemi wireless), un’ottica che giustifica anche riferimenti a temi e problematiche che, pur se non sempre stret- tamente correlate con il livello uno della pila OSI, sono quelle che unitamente ad una solida in- frastruttura garantiscono il pieno supporto del complesso di applicazioni che oggi convergono nei moderni sistemi ICT. Tutto questo senza rinunciare assolutamente alle caratteristiche che, fin dal primo numero, hanno contribuito alla fortuna della pubblicazione: informazione tecnica aggiornata, autorevo- le, scritta o tradotta con grande attenzione alla chiarezza, alla leggibilità e, nello stesso tempo, al rigore tecnico e scientifico. E il “punto zero”? Il punto zero è una promessa e un preciso impegno. Significa che la rivista che state leggendo non rappresenta solo un traguardo raggiunto ma è un punto di partenza destinato ad evolvere e dal quale sviluppare un sistema di diffusione delle informazioni costan- temente aggiornato e sempre in linea con le esigenze di tutte le figure tecniche che operano nel settore delle infrastrutture di rete. Ho parlato di “sistema di diffusione delle informazioni” non a caso, alla rivista si affiancano, infatti, la redazione di numeri speciali monografici, un sito web completamente rinnovato e l’organizzazione in Italia delle prestigiose conferenze BICSI (la prossima sarà il 24 ottobre 2017 a Roma). Strumenti tradizionali e strumenti moderni, quindi, in perfetta sinergia non solo per colmare le lacune di informazione sul piano tecnico ma anche sul piano metodologico, perché l’informazione sia come i tempi attuali esigono, non soltanto completa ed aggiornata, ma an- che facile e veloce da acquisire. Chiudo queste note con un ringraziamento alla Soc. Competition S.r.l., nostro partner per lo sviluppo delle attività di impostazione grafica e di redazione, che ha creduto nel progetto e ha messo a disposizione competenza e passione, le due chiavi del successo in qualunque ambito. Giacomo Scalzo [email protected] gennaio-aprile 2017 cabling&wireless 03 Costruire il data center del futuro 29 La scelta dell’infrastruttura di cablaggio per 2,5 e SOMMARIO 5GBASE-T su rame 36 Connettività Wi-Fi di buon livello, un must per gli Hotel 44 Rivista tecnica sui sistemi e le tecnologie per il trasporto dell’informazione | A cura di SPRING | Anno 8° | gennaio-aprile 2017 | n. 1-2 #TECNOLOGIENEWS gAPPLICAZIONE DI CLOUD ROBOTICS NEI DATA CENTER CHIEDILO A MARIO Rubrica di Posta Tecnica | 06 IN COPERTINA Cablaggio di Categoria 8 per il supporto delle applicazioni oltre i 10 Gb/s | 10 L’ANGOLO DI BICSI CABLAGGIO DI CATEGORIA 8 per il supporto delle applicazioni oltre i 10 Gb/s Costruire il Data Center del futuro | 16 Rivista tecnica sui sistemi CORSI SPRING e le tecnologie per il trasporto dell’informazione - A cura di SPRING Per essere sempre un passo avanti | 27 Anno 8° | Gennaio-Aprile 2017 | n. 1-2 #TECNOLOGIENEWS Direttore Responsabile Applicazione di Cloud Robotics nei Data Center | 32 Giacomo Scalzo [email protected] LA PAROLA AI PRODUTTORI Direttore Tecnico La scelta dell’infrastruttura di cablaggio per 2,5 e 5GBASE-T su rame | 36 Mario Vellano, RCDD, ATS [email protected] TECNONEWS Direttore Editoriale Barbara Pedrazzani EOLO, 5G fisso per gli utenti dei piccoli-medi comuni | 41 [email protected] Ekahau Wifi Survey: al centro della vostra professione, sempre | 42 Redazione Spring S.r.l. Da Teldat il nuovo be.IP plus: ALL IP - ALL in One | 43 Via C. Finocchiaro Aprile 14 20124 - Milano Connettività Wi-Fi di buon livello, un “must” per gli Hotel | 44 Tel. 02.620227218 Fax 02.620227250 Con WatchGuard il WiFi sicuro è su cloud | 45 [email protected] CASE HISTORY Progetto Grafico Competition Srl Per Anima Sgr un nuovo Data Center | 46 Via Torino, 25 20881 - Bernareggio (MB) NEWS DAL CANALE Art director Patrizia Fregonara Compass entra nella rete globale di PartnerPRO di CommScope | 48 [email protected] Relazione e valore aggiunto, i veri motori di EDSlan | 49 Ufficio Commerciale - Pubblicità Marco Fregonara GFO Europe distribuisce Tellabs | 50 [email protected] Stampa INFO DALLE AZIENDE Digiscan S.r.l. Via Dell’Innovazione, 11 Definire gli standard del XXI secolo | 52 20032 - Cormano (MI) I trend 2017 per infrastrutture data center | 54 Reg. Trib. MI n. 154 del 31/03/2010 Registro degli Operatori di Enter guarda all’Europa e apre un nuovo presidio ad Amsterdam | 55 Comunicazione n. 19628 SOLUZIONI PER LA SICUREZZA Telecamere di lettura targhe firmate SELEA | 56 FORMAZIONE È vietata la riproduzione di articoli e illustra- zioni di Cabling & Wireless senza autorizza- Tecnici certificati CCTTTM | 57 zione e senza citarne la fonte. Le idee espres- se dagli autori non impegnano la rivista e la EVENTI responsabilità di quanto pubblicato rimane degli autori stessi. A Roma la Conferenza BICSI | 58 gennaio-aprile 2017 cabling&wireless 05 CHIEDILO A MARIO Riportiamo in questa rubrica una selezione delle domande (e le ri- sposte) ai quesiti più interessanti che abbiamo raccolto durante i nostri corsi e dal contatto continuo con gli operatori tecnici del mondo dell’ITS. Invitiamo tutti i lettori a sottoporci i loro quesiti in- viando la richiesta all’indirizzo [email protected]. Le domande di interesse più generale saranno pubblicate, in forma rigorosamente anonima, su queste pagine. a cura di Mario Vellano COME EVITARE ERRORI SULLE di, formalmente, non dovrebbe essere (proprio come lei ha fatto) e presentino GIUNZIONI OTTICHE imposta finché non viene ufficialmente un’attenuazione media non superiore a Abbiamo appena terminato l’installa- recepita come standard vero e proprio 0,1 dB zione di un cablaggio ottico piuttosto e riconosciuta a livello internazionale. IL ≤ 0,1 dB Insertion Loss complesso all’interno di un compren- Quindi il consulente che ha contestato del singolo giunto sorio industriale di grandi dimensioni. parte del suo lavoro a causa di alcune precisando che il 97% dei giunti in un Abbiamo utilizzato fibra ottica di tipo giunzioni che presentavano un’attenua- impianto in fibra ottica deve presen- mono-modale (SM) con un elevato zione troppo elevata, ha mostrato un tare un valore medio di attenuazione numero di giunzioni. Tutte le certifiche po’ di eccesso di zelo: pur rimanendo non superiore a 0,2 dB eseguite con lo strumento (si tratta di un sempre rigorosamente ispirati a principi IL ≤ 0,2 dB Insertion Loss OLTS composto da unità master e uni- di qualità e competenza professionale sul 97% dei giunti tà remota, di cui omettiamo la marca riteniamo che, con ogni probabilità, nel Questo modo di specificare le misure riportata nella domanda del ns. lettore suo caso le giunzioni incriminate non sui limiti di attenuazione dei giunti ot- – N.d.R.) sono risultate positive, tutta- fossero davvero da rifare. tici si presta a diverse interpretazioni e, via il cliente ha fatto ri-verificare tutte le Per maggiore chiarezza e per soddisfa- non trattandosi per il momento di uno tratte con uno strumento OTDR da un re la curiosità dei nostri lettori, riassu- standard normativo a tutti gli effetti consulente esterno. In seguito all’esame miamo brevemente il contenuto della ma – come dicevamo – di una serie di delle tracce, ci sono stati contestati degli raccomandazione ITU-T L.400/L.12 del raccomandazioni tecniche, non sussiste errori sulle giunzioni ottiche, in quanto 2008 (che è liberamente scaricabile in obbligo di rispettare rigidamente questi – secondo il consulente – alcuni valori formato PDF, come tutte le normative valori. Per chiarire meglio i termini della di attenuazione risultavano superio- pubblicate da ITU - International Tele- questione, spieghiamo che per attenua- ri ai limiti imposti dallo Standard ITU-T communication Union, dal sito www. zione (o Insertion Loss, IL) di valor me- L.12, che non conoscevo e che non mi itu.int). In sintesi, il documento prende dio si intende la misura effettuata nelle pare sia fra quelli normalmente utiliz- in considerazione una serie di aspetti due direzioni: dobbiamo quindi consi- zati come riferimento per il cablaggio importanti per la realizzazione, la qua- derare come valore di IL per un giunto strutturato.
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