Manuale d’uso / di manutenzione del prodotto 10396EA del fabbricante Nortel Networks
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Part No. 212 257-B January 2002 4401 Gr eat Ame rica Parkw ay Santa C lara, CA 9505 4 Installation and Networking Guidelines for Optical Routing.
2 212257-B Copyright © 2002 Nortel Networks All rights reserved. Januar y 2002 . The informati on in this docume nt is subject to change without notice. Th e statements, confi gurations, tech nical data, an d recommenda tions in this document are beli eved to be accurate and reliable, but are prese nted witho ut express or implied warranty .
3 Inst allation and Networki ng Guide lines fo r Optical Routing Japan/Nippon requirements only V oluntary Control Council for Interference (VCCI) statement T aiwa n requiremen ts Bureau of Standards,.
4 212257-B Nortel Networks Inc . softwar e licens e agreement NOTICE: Please carefu lly read this license ag reement before copy ing or using the acc ompanying software or in stalling the hardware unit wi th pre-en abled software (each of which is referred to as “Software” in this Agreement).
5 Inst allation and Networki ng Guide lines fo r Optical Routing to any th ird pa rt y the Sof t ware, or any informa tion ab out the operat ion, des ign, perf o rmance, or implem entation of the Soft.
6 212257-B Licensee f ails to com ply with a ny of the te rms and cond itions of the license. Up on termin ation for an y reason, Lic ensee will immediate ly destroy or return to Nortel Networks the So ftware, user manuals, and all copie s.
7 Inst allation and Networki ng Guide lines fo r Optical Routing Contents Pref ace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Before you begin . . . . . . . . . . . . . . . . . . . . .
8 Contents 212257-B Chapter 3 Install ing the shelf, OADM, and OMUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Preparing for i nstallatio n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 5 Exceeding class 1 po wer level warni ng .
9 Inst allation and Networki ng Guide lines fo r Optical Routing Figures Figure 1 W avelength division m ultiplexing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7 Figure 2 CWDM GB IC transceive r and label . . . . . . . . . . . . .
10 Figures 212257-B.
11 Inst allation and Networki ng Guide lines fo r Optical Routing Ta b l e s T able 1 Parts of the optical routi ng system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8 T able 2 Assump tions us ed in cal culatin g maximu m transmis sion dis tance .
12 Tables 212257-B.
13 Inst allation and Networki ng Guide lines fo r Optical Routing Preface Nortel Ne tworks* opt ical rou ting system su pports hi gh-speed da ta communic ations in met ropolita n area net works (MANs) by : • Connect ing Gigabit Ethernet ports with fiber op tic networ ks.
14 Pref ace 212257-B Before you begin This gui de is int ended for net work adminis trators who have the following backgrou nd: • Basic knowledge of networks, and network hardware • Famil iarity w.
Preface 15 Install ation and Ne tworking Guidel ines for O ptical Routi ng How to ge t help If you pu rchased a service c ontract for your Nor tel Networks product fr om a distri butor or authorized r eseller , contact t he techni cal suppo rt staf f for t hat distri butor or reselle r for ass ista nce.
16 Pref ace 212257-B.
17 Inst allation and Networki ng Guide lines fo r Optical Routing Chapter 1 Describing the o ptical routing system Nortel Ne tworks* opt ical rou ting system us es coarse wavelength division multipl exing (CWDM) in a grid of e ight opti cal wavele ngths.
18 Chapter 1 Describi ng the opti cal routin g system 212257-B Parts of the op tical routing system The optic al routi ng system i ncludes the f ollowing p arts: • Gig a bit in terfac e conve r ters.
Chapter 1 Describi ng the optical routing system 19 Install ation and Ne tworking Guidel ines for O ptical Routi ng Figure 2 CWDM GBIC trans ceiver an d label For more i nformatio n about CWDM GBICs, including specifi cations, see Instal ling CWDM Gigabit Interf ace Converters , pa rt number 21 2256-B.
20 Chapter 1 Describi ng the opti cal routin g system 212257-B Figure 3 CWDM OADM netw ork and equi pment si de connecti ons The CWDM OADM ( Figure 4 ) is instal led in a 19 -inch, rac k-mounted 1RU optical shel f ( Figure 15 ).
Chapter 1 Describi ng the optical routing system 21 Install ation and Ne tworking Guidel ines for O ptical Routi ng Figure 5 shows an exampl e of two se parate fibe r paths i n a ring c onfiguratio n travel ing in opposite or east/ west direc tions in to the network.
22 Chapter 1 Describi ng the opti cal routin g system 212257-B Figure 6 Four -cha nnel CWDM OM UX front pane l Connector s with col or- coded labe ls ( Ta b l e 1 ) simplify co nnecti on to color -code d CWDM GBICs in the switch. CWDM OMUX-4 Figure 7 shows the CWDM OMUX-4 vers ion, with four CWDM GBIC equipment side conne ctions.
Chapter 1 Describi ng the optical routing system 23 Install ation and Ne tworking Guidel ines for O ptical Routi ng Figure 8 CWDM OMUX -8 net work and equ ipm ent si de co nnec tions For info rmation abo ut insta lling a CWDM OMUX, see “I nserti ng a CWDM OADM or a CWDM OMUX” on page 38 .
24 Chapter 1 Describi ng the opti cal routin g system 212257-B Figure 9 CWDM OM UX po int-to-poi nt configu ration exa mple For info rmation abo ut calcul ating ne twork tran smission dist ance, see Chapter 2, “Cal culat ing tra nsm is sion d istan ce,” on pa ge 27 .
Chapter 1 Describi ng the optical routing system 25 Install ation and Ne tworking Guidel ines for O ptical Routi ng Figure 10 CWDM OMUX ring c onfiguratio n example For info rmation abo ut calcul ating ne twork tran smission dist ance, see Chapter 2, “Cal culat ing tra nsm is sion d istan ce,” on pa ge 27 .
26 Chapter 1 Describi ng the opti cal routin g system 212257-B.
27 Inst allation and Networki ng Guide lines fo r Optical Routing Chapter 2 Calculating transmission distance This chapt er will help you de termin e the maximum transm ission dis tance for your CWDM network conf iguration.
28 Chapte r 2 Calcula ting tran smission distan ce 212257-B How to calculate expected loss budget T o calculate the expected loss budge t for a pr oposed netw ork config uration: 1 Identi fy all poi nts where si gnal str ength will be lost. 2 Calculat e the exp ected los s for each poi nt.
Chapter 2 Calculat ing transmi ssion distan ce 29 Install ation and Ne tworking Guidel ines for O ptical Routi ng Procedure T o calculate the maximum trans mission dist ance for a proposed ne twork configu ratio n: 1 Identi fy all poi nts where si gnal str ength will be lost.
30 Chapte r 2 Calcula ting tran smission distan ce 212257-B Ta b l e 3 sh ows t yp ical l oss va lues that ca n be u sed to calcu late t he tran smi ss ion distanc e for the point-t o-poin t network i n Fi gure 1 1 .
Chapter 2 Calculat ing transmi ssion distan ce 31 Install ation and Ne tworking Guidel ines for O ptical Routi ng As it pas ses from po int A to poi nt B (the most remot e points in the m esh ring net.
32 Chapte r 2 Calcula ting tran smission distan ce 212257-B Ta b l e 5 sh ows t yp ical l oss va lues that ca n be u sed to calcu late t he tran smi ss ion distanc e for the mesh ring n etwork example i n Figur e 12 .
Chapter 2 Calculat ing transmi ssion distan ce 33 Install ation and Ne tworking Guidel ines for O ptical Routi ng Hub and spo ke transmission distance Hub and Spoke topologi es are the most complex . The cha racterist ics of al l components designed i nto the n etwork must be co nsidered in calcul ating transmi ssion dis tance.
34 Chapte r 2 Calcula ting tran smission distan ce 212257-B Ta b l e 7 sh ows t yp ical l oss va lues that ca n be u sed to calcu late t he tran smi ss ion distanc e for the hub and spok e network i n Figure 13 . Ta b l e 8 shows the calcul ations used to de termi ne maximum tra nsmissi on distan ce for the hub and spok e network i n Figure 13 .
35 Inst allation and Networki ng Guide lines fo r Optical Routing Chapter 3 Installin g the shelf, OADM, and OMUX The shelf and multi plexers a re passive e quipment and require n o power or electr onic This chapter d escribes how to instal l optica l routing components, and include s the fol lowing topics .
36 Chapter 3 Install ing the sh elf, OADM, a nd OMUX 212257-B Figure 14 Cla ss 1M laser w arnin g Environmental and physical requirements The optic al ro uting syst em is moun ted in an o ptical s helf with connec tions at the front of t he modu le.
Chapter 3 Installi ng the shelf, OADM, and OMUX 37 Install ation and Ne tworking Guidel ines for O ptical Routi ng • Clear t he area of syntheti c materials such as pol yester , plastic, vinyl , or styrof oam because t hese materia ls carr y static electrici ty that d amages the equipment .
38 Chapter 3 Install ing the sh elf, OADM, a nd OMUX 212257-B Figure 15 She lf with plug- in modul e in 19-inch r ack Inserting a CWDM OADM or a CWDM OMUX CWDM OADMs and CWDM OMUXs are pass ive devices that requ ire no power for the ir opera tion.
Chapter 3 Installi ng the shelf, OADM, and OMUX 39 Install ation and Ne tworking Guidel ines for O ptical Routi ng T o insert a CWDM OADM or a CWDM OMUX in the optica l shelf: 1 Align th e plug-in module with t he optica l shelf. 2 Gently pu sh the plug -in module into the s helf cavi ty .
40 Chapter 3 Install ing the sh elf, OADM, a nd OMUX 212257-B 2 Insert the wavele ngth-spec ific CWDM GBICs into the ir respe ctive netw ork device( s) . T o instal l a CWDM GBIC, se e I nstal ling CWDM Gigab it Interf ace Conver ters, part number 212256-B.
Chapter 3 Installi ng the shelf, OADM, and OMUX 41 Install ation and Ne tworking Guidel ines for O ptical Routi ng Cabling a four-channel CWDM OMUX This sec tion desc ribes how t o cable th e followin.
42 Chapter 3 Install ing the sh elf, OADM, a nd OMUX 212257-B 4 Make the f ollowing ne twork backb one connect ions ( Figure 17 ): • Connect the netwo rk back bone east f iber opt ic cable s to the ea st (lef t) CWDM OMUX-4. • Connect the network b ackbone west fiber op tic cabl es to the west (right ) CWDM OMUX-4.
Chapter 3 Installi ng the shelf, OADM, and OMUX 43 Install ation and Ne tworking Guidel ines for O ptical Routi ng 4 Make the f ollowing ne twork backb one connect ions ( Figure 18 ): • Connect the netwo rk back bone east f iber opt ic cable s to the ea st (lef t) CWDM OMUX-8.
44 Chapter 3 Install ing the sh elf, OADM, a nd OMUX 212257-B Removing a CWDM OAD M or a CWDM OMUX CWDM OADMs and CWDM OMUXs are pass ive devices that requ ire no power for the ir opera tion. Y ou ca n remove the m from the opt ical she lf ( Figure 15 ) after disconne cting the m from your ne twork.
45 Inst allation and Networki ng Guide lines fo r Optical Routing Appe ndix A CWDM OADM specifications Ta b l e 9 CW DM OADM sp ecifi catio ns Item S peci ficat ion Physica l Dim en sions Plug-in M od ule Size Rack Mount 8.
46 Appendi x A CWDM O ADM specifi cations 212257-B.
47 Inst allation and Networki ng Guide lines fo r Optical Routing Appe ndix B CWDM OMUX specifications Ta b l e 1 0 C WDM OMUX spec ifications Item Specification Physica l Dim en sions Plug-in M od ule Size Rack Mount 8.
48 Appendi x B CWDM O MUX specifi cations 212257-B.
49 Inst allation and Networki ng Guide lines fo r Optical Routing Appe ndix C Handling and cleaning fiber o ptic equip ment Precautions Although t he glass optical path of fi ber optic ca ble is pr otected wi th reinf orcing materi al and plast ic ins ulat io n, it is sub je ct to d amag e.
50 Appendi x C Handli ng and clea ning fiber optic equi pment 212257-B Frequent overs tressing of fiber optic ca ble causes progress ive degene rati on that leads t o failur e. If you s uspect damag e to a fiber optic cab le, eithe r due to mis handling o r an abnormall y high err or rate o bserve d in one dir ection, r everse the cable pairs.
Append ix C Ha ndling an d cleaning fiber opti c equip ment 51 Install ation and Ne tworking Guidel ines for O ptical Routi ng Before c onnecting them to tra nsmission equipment, tes t equipment , patch pan els, or other connector s, clean all fibe r optic c onnectors.
52 Appendi x C Handli ng and clea ning fiber optic equi pment 212257-B 4 Dry the c onnector s urfaces b y applying canned air or lett ing them ai r dry . Cleaning Duplex SC Connectors T o clean duplex connector s: 1 T o remo ve or re tract t he sh ro ud, do one of th e foll owing .
Append ix C Ha ndling an d cleaning fiber opti c equip ment 53 Install ation and Ne tworking Guidel ines for O ptical Routi ng Cleaning Receptacle or Duplex Devices T o clean recepta cle or dupl ex device s: 1 Remove dust or debris by blowing c anned air int o the opt ical port of the device u sing th e canned ai r extens ion tube.
54 Appendi x C Handli ng and clea ning fiber optic equi pment 212257-B.
55 Inst allation and Networki ng Guide lines fo r Optical Routing Glossary attenuation The decre ase in si gnal str ength in an opt ical fi ber cause d by absorpt ion and scatte ring.
56 Glossa ry 212257-B CD-ROM compact di sc read- only memory A compact di sc with pr e-recor ded data, normal ly used i n lar ge databa se-type applica tions suc h as dire ctory , refer ence, or da ta retr ieval. chan nel A communic ations path o r the sig nal sent over that path.
Glossa ry 57 Install ation and Ne tworking Guidel ines for O ptical Routi ng demultiple xing The separ ating of dif ferent wav elengths in a wavelengt h-divisi on multipl exing system. The opposite of multipl exing. dispersion The broade ning of i nput pulse s as they tra vel the l ength of a n optical fi ber .
58 Glossa ry 212257-B fiber See opti cal fibe r . fiber loss Also opt ical fib er loss. Th e attenuati on of the l ight signal in optic al-fib er transmi ssion. fiber-optic li nk A combinati on of tra nsmitter , receiver , and fiber -opt ic cable capable o f trans mitti n g data .
Glossa ry 59 Install ation and Ne tworking Guidel ines for O ptical Routi ng hub A group of circuit s connecte d at one point on a netw ork. insertion lo ss In an opt ical fi ber syste m, the tota l optica l power los s caused by insertion o f an opti cal compone nt, su ch as a c onnector , splice, or c oupler .
60 Glossa ry 212257-B loss budget The amount o f optical power lau nched into a system th at will b e lost th rough various mechanisms, s uch as ins ertion loss es and fib er atten uation. Usu ally given in dB. MAN metropol itan are a network A MAN consists of LANs inte rconnecte d within a radius of approximatel y 80 km (50 miles).
Glossa ry 61 Install ation and Ne tworking Guidel ines for O ptical Routi ng NDSF non-dis persion- shifted fib er A type of optical f iber optimi zed for th e 1310 nm transmi ssion windo w . nanometer See nm. nm nanometer One bill ionth of a meter ( 10 -9 meter) .
62 Glossa ry 212257-B each si gnal level thereafte r operat es at a sp eed divis ible by th at number . For example, OC- 3 operates at 155.52 Mbit/s. OC-1 optical carrie r - l evel 1 An optica l SONET signal at 51.84 Mbit /s. OC-3 optical carrie r - l evel 3 An optica l SONET signal at 155.
Glossa ry 63 Install ation and Ne tworking Guidel ines for O ptical Routi ng optical w aveguide See opti cal fibe r . passive dev ice A device t hat does n ot requir e a source of ener gy to f unction. passthrough A signal bypass mecha nism tha t allows the signal t o pass through a device with li ttle or no signa l proces sing.
64 Glossa ry 212257-B single-mod e fiber See SMF . SMF A mode is o ne of the various light wav es that can be tr ansmitte d in an opt ical fiber . Each opti cal signa l ge nerates ma ny di f fere nt mode s, bu t in singl e- mo de fiber t he aim is t o only have o ne of them tran smitted.
Glossa ry 65 Install ation and Ne tworking Guidel ines for O ptical Routi ng WDM wavelengt h divisi on multiplexi ng T ran smitting many di ff erent col ors (wavel engths) o f laser li ght down the same opti cal fibe r at the same time in order to increase the amount o f infor mation that c a n be tra n sferr ed.
66 Glossa ry 212257-B.
Inst allation and Networki ng Guide lines fo r Optical Routing 67 Index A add/drop m ux connecting cables 39 desc ription 1 9 insert in shelf 38 remove from shelf 44 ring application 20 specifications.
68 Index 212257-B equipmen t side conn ections add/drop m ux 39 eight-chan nel mux/demu x 42 four -channe l mux/de mux 41 F FC connectors, cleaning 51 fiber optic cable attenu ation an d transmis sion.
Index 69 Install ation and Ne tworking Guidel ines for O ptical Routi ng optical routing system desc ription 1 7 shelf, installin g 37 P passband, specification add/drop m ux 45 physical dimensions, s.
70 Index 212257-B.
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