Nortel Networks 10396EA, 10292FA User Manual

Part No. 212257-B January 2002

4401 Great America Parkway Santa Clara, CA 95054

Installation and Networking Guidelines for Optical Routing

recommendations in this document are believed to be accurate and reliable, but are presented without express or implied warranty. Users must take full responsibility for their applications of any products specified in this document. The information in this document is proprieta ry to Nortel Networ ks Inc.

T rade mark s

Nortel Networks, the Nortel Networks logo, and th e Glo bemark are trademarks of Nortel Networks. Adobe and Acrobat Reader are trademarks of Adobe Systems Incorporated.

Statement of con ditions

In the interest of improving internal design, operational function, and/or reliability, Nortel Networks Inc. reserves the right to make changes to the products described in this document without notice.

Nortel Networks Inc. does not assume any liability that may occur d ue t o t he use or application of the product ( s) or circuit layout(s) described herein.

USA requirements only

Federal Communications Commission (FCC) Compliance Notice: Radio Frequency Notice

Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy. If it is not installed and used in accordance with the instructio n manual , it may cause harm ful inte rferen ce to radio communications. Op erati on o f th is e quip men t in a resid en tial area is likely to cause harm ful interference, in which case users will be required to take whatever measures may be necessary to correct the interference at their own expense.

European requirements only

EN 55 022 statement

This is to certify that the Nortel Networks optical routing system is shielded against the generation of radio interference in accordance with the application of Council Directive 89/336/EEC, Article 4a. Conformity is declared by the application of EN 55 022 Class A (CISPR 22).

Warning: This is a Class A product. In a domestic environment, this product may cause radio interferen ce, in whic h case, the user may be required to take appropriate measures.

Achtung: Dieses ist ein Gerät der Funkstörgrenzwertklasse A. In Wohnbereichen können bei Betrieb dieses Gerätes Rundfunkstörungen auftreten, in welchen Fällen der Benutzer für entsprechende Gegenmaßnahmen verantwortlich ist.

Attention: Ceci est un produit de Classe A. Dans un environnement domesti que, ce produit risque de créer des interférences radioélectriques, il appartiendra alors à l’utilisateur de prendre les mesures spécifiques appropriées.

EC Declaration of Conformity

These product conforms to the provisions of the R&TTE Directive 1999/5/EC.

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Japan/Nippon requirements only

Voluntary Control Council for Interference (VCCI) statement

Taiwan requirements

Bureau of Standards, Metrology and Inspection (BSMI) Statement

Canada requirements only

Canadian Department of Communications Radio Interference Regulations

This digital apparatus doe s not exceed the Class A limits for radio-nois e emissions from digital apparatus as set out in the Radio Interference Regulations of the Canadian Department of Communications.

Règlement sur le brouillage radioélectrique du ministère des Communications

Cet appareil numérique respecte les limites de bruits radioélectriques visant les appareils numériques de classe A prescrites dans le Règlement sur le brouillage radioélectrique du ministère des Communications du Canada.

Canadian Department of Communications Radio Interference Regulations

This digital apparatus does not exceed the Class B limits for radio-noise emissions from digital apparatus as set out in the Radio Interference Regulations of the Canadian Department of Communications.

Règlement sur le brouillage radioélectrique du ministère des Communications

Cet appareil numérique respecte les limites de bruits radioélectriques visant les appareils numériques de classe B prescrites dans le Règlement sur le brouillage radioélectrique du ministère des Communications du Canada.

Installation and Networking Guidelines for Optical Routing

Warning: Fiber optic equipment can emit laser or infrared light that can injure your eyes. Never look into

an optical fiber or connector port. Always assume that fiber optic cables are connected to a ligh t so urce.

Warning: Vorsicht: Glasfaserkomponenten können Laserlicht bzw. Infrarotlicht abstrahlen, wodurch

Ihre Augen geschädigt werden können. Schauen Sie niemals in einen Glasfaser-LWL oder ein Anschlußteil. Gehen Sie stets davon aus, daß das Glasfaserkabel an eine Lichtquelle angeschlossen ist.

Warning: Avertissement: L’équipement à fibre optique peut ém ettre des rayons laser ou i nf rarouges

qui risquent d’entraîner des lésions oculaires. Ne jamais regarder dans le port d’un connecteur ou d’un câble à fibre optique. Toujours supposer que les câb les à fibre optique sont raccordés à une source lumineuse.

Warning: Advertencia: Los equipos de fibra óptica pueden emitir radi acione s de lá ser o in frarrojas que

pueden dañar los ojo s . No mire nunca en el interior de una fibra óptica ni de un puerto de conexi ón. Suponga siempre que los cables de fibra óptica están conectados a una fuente lumi nosa.

Warning: Avvertenza: Le apparecchiature a fibre o ttiche e metto n o ragg i la ser o in frarossi c he po sson o

risultare dannosi per gli occhi. Non guardare mai direttamente le fibre ottiche o le porte di collegamento. Tenere in considerazione il fatto che i cavi a fibre ottiche sono collegati a una sorgente luminosa.

Nortel Networks Inc. software license agreement

NOTICE: Please carefully read this license agreement before copying or using the accompanying software or installing

the hardware unit with pre-enabled software (each of which is referred to as “Software” in this Agreement). BY COPYING OR USING THE SOFTWARE, YOU ACCEPT ALL OF THE TERMS AND CONDITIONS OF THIS LICENSE AGREEMENT. THE TERMS EXPRESSED IN THIS AGREEMENT ARE THE ONLY TERMS UNDER WHICH NORTEL NETWORKS WILL PERMIT YOU TO USE THE SOFTWARE. If you do not accept these terms and conditions, return the product, unused and in the original shipping container, within 30 days of purchase to obtain a credit for the full purchase price.

1. License grant. Nortel Networks Inc. (“Nortel Networks”) grants the end user of the Software (“Licensee”) a personal, nonexclusive, nontransferable license: a) to use the Software either on a single computer or, if applicable, on a single authorized device identified by host ID, for which it was originally acquired; b) to copy the Software solely for backup purposes in support of authorized use of the Software; and c) to use and copy th e associated user manual solely in support of authorized use of the Software by Licensee. This license applies to the Software only and does not extend to Nortel Networks Agent software or other Nortel Networks software products. Nortel Networks Agent software or other Nortel Networks software products are licensed for use under the terms of the applicable Nortel Networks Inc. Software License Agreement that accompanies such software and upon payment by the end user of the applicable license fees for such software.

2. Restrictions on use; reservation of rights. The Software and user manuals are prot ected under copyright laws. Nortel Networks and/or its licensors retain all title and ownership in both the Software and user manuals, including any revisions made by Nortel Networks or its licensors. The copyright notice must be reproduced and inclu ded with any copy of any portion of the Software or user manuals. Licensee may not modify, translate, decompile, disassemble, use for any competitive analysis, reverse engineer, distribute, or create derivative works from the Software or user manuals or any copy, in whole or in part. Except as expressly provided in this Agreement, Licensee may not copy or transfer the Software or user manuals, in whole or in part. The Software and user manuals embody Nort el Networks’ and its licensors’ confidential and proprietary intellectual property. Licensee shall not sublicense, assign, or otherwise disclose

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to any third party the Software, or any information about the operat ion, design, performance, or implementation of the Software and user manuals that is confidential to Nortel Networks and its licensors; however, Licensee may grant

permission to its consultants, subcontractors, and agents to use the Software at Licensee’s facility, provided they have agreed to use the Software only in accordance with the terms of this license.

3. Limited warranty. Nortel Networks warrants each item of Software, as del ivered by Nortel Networks and prop erly installed and operated on Nortel Networks hardware or other equipment it is originally licensed for, to function substantially as described i n i ts accompanying user manual during i ts warranty period, which begins on the date Software is first shipped to Licensee. If any item of Software fails to so function during its warranty period, as the sole remedy Nortel Networks will at its discretion provide a suitable fix, patch, or workaround for the problem that may be included in a future Software release. Nortel Networks further warrants to Licensee that the media on which the Software is provided will be free from defects in materials and workmanship under normal use for a period of 90 days from the date Software is first shipped to Licensee. Nortel Networks will replace defective media at no charge if it is returned to Nortel Netwo rks du ring the warranty perio d alon g with p roof of the da te of shi pment. This warr anty do es no t apply if the media has been damaged as a result of accident, misuse, or abuse. The Licensee assumes all responsibility for selection of the Software to achieve Licensee’s intended results and for the installation, use, and results obtained from the Software. Nortel Networks does not warrant a) that the functions contained in the software will meet the Licensee’s requirements, b) that the Software will operate in the hardware or software combinations that the Licensee may select, c) that the operatio n of the Software will be un int err up te d or error free, or d) that all defects in the operation of the Software will be corrected. Nortel Networks is not obligated to remedy any Software defect that cannot be reproduced with the latest Software release. These warranties do not apply to the Software if it has been (i) altered, except by Nortel Networks or in acco rdance with its instructio ns; (ii) use d in conjun ction with anothe r vendo r’s product, resulting in the defect; or (iii) damaged by improper environment, abuse, misuse, accident, or negligence. THE FOREGOING WARRANTIES AND LIMITATIONS ARE EXCLUSIVE REMEDIES AND ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTY OF MERCHANT ABILIT Y OR FITNESS FOR A PARTICULAR PURPOSE. Licensee is responsible for the security of its own data and information a nd for maintaini ng adeq uate pro cedures apart from the Software to re cons truct lost or altered files, data, or programs.

4. Limitation of liability. IN NO EVENT WILL NORTEL NETWORKS OR ITS LICENSORS BE LIABLE FOR ANY COST OF SUBSTITUTE PROCUREMENT; SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES; OR ANY DAMAGES RESULTING FROM INACCURATE OR LOST DATA OR LOSS OF USE OR PROFITS ARISING OUT OF OR IN CONNECTION WITH THE PERFORMANCE OF THE SOFTWARE, EVEN IF NORTEL NETWORKS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT SHALL THE LIABILITY OF NORTEL NETWORKS RELATING TO THE SOFTWARE OR THIS AGREEMENT EXCEED THE PRICE PAID TO NORTEL NETWORKS FOR THE SOFTWARE LICENSE.

5. Government licensees. This provision applies to all So ftware an d do cumenta tion ac quired direc tly or i ndirect ly by or on behalf of the United States Gov ernment. The Software and documenta tion are commercial products, l icensed on the open market at market prices, and were developed entirely at private expense and without the use of any U.S. Government funds. The license to the U.S. Government is granted only with restricted rights, and use, duplication, or disclosure by the U.S. Government is subject to the restrictions set forth in subparagraph (c)(1) of the Commercial Computer Software––Restricted Rights clause of FAR 52.227-19 and the limitations set out in this license for civilian agencies, and subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause of DFARS

252.227-7013, for agencies of t he Department of Defense or their successors, whichever is applicable.

6. Use of software in the European Community. This provision applies to all Software acquired for use within the European Community. If Licensee uses the Software within a country in the European Community, the Software Directive enacted by the Council of Europ ean Communit ies Directive dated 14 May , 19 91, will apply to th e examinati on of the Software to facilitate interoperability. Licensee agrees to notify Nortel Networks of any such intended examination of the Soft war e and may procure support and assistance from Nortel Networks.

7. Term and termination. This license is effective until terminated; however, all of the restrictions with respect to Nortel Networks’ copyright in the Software and user manuals will cease being effective at the date of expiration of the Nortel Networks copyright; those re strictions relatin g to use and disclosure o f Nortel Networks’ co nfidential information shall continue in effect. Licensee may terminate this license at any time. The license will automatically terminate if

Installation and Networking Guidelines for Optical Routing

Licensee fails to comply with any of the terms and conditions of the license. Upon termination for any reason, Licensee will immediately destroy or return to Nort el Networks the Software, u ser manuals, and all copies. Nort el Networks is not liable to Licensee for damages in any form solely by reason of the termination of this license.

8. Export and re-export. Licensee agrees not to export, directly or indirectly, the Software or related technical data o r information without first obtaining any required export licenses or other governmental approvals. Without limiting the foregoing, Licensee, on behalf of itself a nd its subsidiaries and af filiates, agree s that it will not, without first ob taining all export licenses and approvals required by the U.S. Government : (i) export, re-export, transfer, or divert any such Software or technical data, or any direct product thereof, to any country to which such exports or re-exports are restricted or embargoed under United States export control laws and regulations, or to any national or resident of such restricted or embargoed coun tries; or (ii) provide the Software or related tech nic al data or in form atio n to an y m ilit ary end user or for any military end use, including the design, development, or production of any chemical, nuclear, or biological weapons.

9. General. If any provision of this Agreement is held to be invalid or unenforceable by a court of competent jurisdiction, the remainder of the prov isions of this Agree ment shall remain in full force and ef fect. Th is Agreement will be governed by the laws of the state of California.

Should you have any questions concerning this Agreement, contact Nortel Networks Inc., 2375 N. Glenville Dr., Richardson, TX 75082.

LICENSEE ACKNOWLEDGES THAT LICENSEE HAS READ THIS AGREEMENT, UNDERSTANDS IT, AND AGREES TO BE BOUND BY ITS TERMS AND CONDITIONS. LICENSEE FURTHER AGREES THAT THIS AGREEMENT IS THE ENTIRE AND EXCLUSIVE AGREEMENT BETWEEN NORTEL NETWORKS AND LICENSEE, WHICH SUPERSEDES ALL PRIOR ORAL AND WRITTEN AGREEMENTS AND COMMUNICATIONS BETWEEN THE PARTIES PERTAINING TO THE SUBJECT MATTER OF THIS AGREEMENT. NO DIFFERENT OR ADDITIONAL TERMS WILL BE ENFORCEABLE AGAINST NORTEL NETWORKS UNLESS NORTEL NETWORKS GIVES ITS EXPRESS WRITTEN CONSENT, INCLUDING AN EXPRESS WAIVER OF THE TERMS OF THIS AGREEMENT.

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Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Before you begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Hard-copy technical manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

How to get help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Chapter 1

Describing the optical routing system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Parts of the optical routing system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Gigabit interface converter description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Optical add drop multiplexer description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Network add/drop ring application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Optical multiplexer/demultiplexer description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

CWDM OMUX-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

CWDM OMUX-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

CWDM OMUX in a point-to-point application . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

CWDM OMUX in a ring application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Chapter 2

Calculating transmission distance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

About transmission distance and optical link budget . . . . . . . . . . . . . . . . . . . . . . . . .27

How to calculate expected loss budget . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

How to calculate maximum transmission distance . . . . . . . . . . . . . . . . . . . . . . . . 28

Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Point-to-point transmission distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Mesh ring transmission distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Hub and spoke transmission distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Installation and Networking Guidelines for Optical Routing

8 Contents

Chapter 3

Installing the shelf, OADM, and OMUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Preparing for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Installing the shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Inserting a CWDM OADM or a CWDM OMUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Cabling a CWDM OADM or a CWDM OMUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Removing a CWDM OADM or a CWDM OMUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Appendix A

CWDM OADM specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Appendix B

CWDM OMUX specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Exceeding class 1 power level warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Environmental and physical requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Electrostatic discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Cabling a CWDM OADM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Cabling a four-channel CWDM OMUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Cabling an eight-channel CWDM OMUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

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Appendix C

Handling and cleaning fiber optic equipment. . . . . . . . . . . . . . . . . . . . . . . 49

Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Cleaning Fiber Optic Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Cleaning Single SC and FC Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Cleaning Duplex SC Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Cleaning Receptacle or Duplex Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figures

Figure 1 Wavelength division multiplexing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 2 CWDM GBIC transceiver and label . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Figure 3 CWDM OADM network and equipment side connections . . . . . . . . . . . . 20

Figure 4 CWDM OADM Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Figure 5 CWDM OADM ring configuration example . . . . . . . . . . . . . . . . . . . . . . . .21

Figure 6 Four-channel CWDM OMUX front panel . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 7 CWDM OMUX-4 network and equipment side connections . . . . . . . . . .22

Figure 8 CWDM OMUX-8 network and equipment side connections . . . . . . . . . .23

Figure 9 CWDM OMUX point-to-point configuration example . . . . . . . . . . . . . . . . 24

Figure 10 CWDM OMUX ring configuration example . . . . . . . . . . . . . . . . . . . . . . . .25

Figure 11 Point-to-point network configuration example . . . . . . . . . . . . . . . . . . . . . . 29

Figure 12 Mesh ring network configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 13 Hub and spoke network configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 14 Class 1M laser warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 15 Shelf with plug-in module in 19-inch rack . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 16 Cabling a CWDM OADM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 17 Cabling a CWDM OMUX-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Figure 18 Cabling an CWDM OMUX-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Installation and Networking Guidelines for Optical Routing

10 Figures

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Tables

Table 1 Parts of the optical routing system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 2 Assumptions used in calculating maximum transmission distance . . . . .28

Table 3 Point-to-point signal loss values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Table 4 Point-to-point maximum transmission distance calculations . . . . . . . . . . 30

Table 5 Mesh ring signal loss values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 6 Mesh ring maximum transmission distance calculations . . . . . . . . . . . . .32

Table 7 Hub and spoke signal loss values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Table 8 Hub and spoke maximum transmission distance calculations . . . . . . . . .34

Table 9 CWDM OADM specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Table 10 CWDM OMUX specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Installation and Networking Guidelines for Optical Routing

12 Tables

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Preface

Nortel Networks* optical routing system supports high-speed data

communications in metropolitan area networks (MANs) by:

• Connecting Gigabit Ethernet ports with fiber optic networks.

• Combining multiple wavelengths on a single fiber to expand available bandwidth.

The system components include:

Component Function

CWDM Gigabit interface converters (GBICs)

Passive optical multiplexing devices

Passive optical shelf Houses the multiplexers.

Convert signals in a switch to laser light for connection to a fiber optic network.

Combine laser light signals received from GBICs onto a single fiber for transport to the destination. Separates the wavelengths at the destination and routes them onto different fibers which terminate on separate GBICs.

This book contains the following topics:

• “Describing the optical routing system” on page 17

• “Calculating transmission distance” on page 27

• “Installing the shelf, OADM, and OMUX” on page 35

• “CWDM OADM specifications” on page 45

• “CWDM OMUX specifications” on page 47

• “Handling and cleaning fiber optic equipment” on page 49

Installation and Networking Guidelines for Optical Routing

14 Preface

Before you begin

This guide is intended for network administrators who have the following background:

• Basic knowledge of networks, and network hardware

• Familiarity with networking concepts and terminology

• Familiarity with Ethernet network administration and Fiber Channel networking

Hard-copy technical manuals

You can print selected technical manuals and release notes free, directly from the Internet. Go to the www.nortelnetworks.com/documentation URL. Find the product for which you n eed documentation. Then locat e the specific categor y an d model or version for your hardware or software product. Use Adobe* Acrobat Reader* to open the manuals and release notes, search for the sections you need, and print them on most standard printers. Go to Adobe Systems at the

www.adobe.com URL to download a free copy of the Adobe Acrobat Reader.

212257-B

You can purchase selected documentation sets, CDs, and technical publications through the Internet at the www1.fatbrain.com/documentation/nortel/ URL.

How to get help

If you purchased a service contract for your Nortel Networks product from a distributor or authorized reseller, contact the technical support staff for that distributor or reseller for assistance.

If you purchased a Nortel Networks service program, cont act one of the fol lowing Nortel Networks Technical Solutions Centers:

Technical Solutions Center Telephone

Europe, Middle East, and Africa (33) (4) 92-966-968 North America (800) 4NORTEL or (800) 466-7835 Asia Pacific (61) (2) 9927-8800 China (800) 810-5000

Additional information about the Nortel Networks Technical Solutions Centers is available from the www.nortelnetworks.com/help/contact/global URL.

Preface 15

An Express Routing Code (E RC) i s av ail ab le f or ma ny Nor te l Ne twor ks p roducts and services. When you use an ERC, your call is routed to a technical support person who specialize s in suppor ting tha t product or service. To locate an ERC for your product or service, go to the http://www130.nortelnetworks.com/cgi-bin/

eserv/common/essContactUs.jsp URL.

Installation and Networking Guidelines for Optical Routing

16 Preface

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Chapter 1 Describing the optical routing system

Nortel Networks* optical routing system uses coarse wavelength division multiplexing (CWDM) in a grid of eight optical wavelengths. CWDM Gigabit Interface Converters (GBICs) in the switch transmit optical signals from Gigabit Ethernet por ts to multiplexers in a passive optical shelf. Multiplexer s combine multiple wavelengths traveling on different fibers onto a single fiber (Figure 1). At the receiver end of the l ink, demul tipl exers separ ate th e wavele ngths a gain a nd route them onto dif fere nt fibe rs which t erminate on separa te CWDM GBICs a t the destination. The system supports both ring and point-to-point configurations.

Figure 1 Wavelength division multiplexing

signal

Multiplexer

Single Fiber

Demultiplexer

= Wavelength

This chapter includes the fo llowing topic s:

• “Parts of the optical routing system” next

• “Gigabit interface converter description” on page 18

• “Optical add drop multiplexer description” on page 19

• “Optical multiplexer/demultiplexer description” on page 21

signal

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18 Chapter 1 Describing the optical routing system

Parts of the optical routing system

The optical routing system includes the following parts:

• Gigabit in terface converters (CWDM GBICs)

• Optical add/drop multiplexers (CWDM OADMs)

• Optical multiplexer/demultiplexers (CWDM OMUXs)

• Optical shelf to house the multiplexers

Table 1 shows the parts of the opti cal r outing syste m, and th e color matchi ng used

to distinguish the eight wavelengths.

Table 1 Parts of the optical routing system

Wavelength (longwave) Color code

1470 nm Gray AA1419017 AA1402002 AA1402010 AA1402001 1490 nm Violet AA1419018 AA1402003 AA1402009 1510 nm Blue AA1419019 AA1402004 1530 nm Green AA1419020 AA1402005 AA1402009 1550 nm Yellow AA1419021 AA1402006 1570 nm Orange AA1419022 AA1402007 AA1402009 1590 nm Red AA1419023 AA1402008 1610 nm Brown AA1419024 AA1402011 AA1402009

GBIC part number

Multiplexer part number

Optical shelf part numberOADM OMUX-4 OMUX-8

Gigabit interface converter description

Nortel Networks* coarse wavelength division multiplexed Gigabit Interface Converters (Figure 2) convert signals in a switch to laser light for connection to a fiber optic network. A CWDM GBIC t ransmit s and rec eives optica l sig nals a t one of eight specific wavelengths.

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Nortel CWDM GBICs use Avalanche Photodiode (APD) technology to improve transmission distance and optical link budget.

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Chapter 1 Describing the optical routing system 19

Figure 2 CWDM GBIC transceiver and label

Wavelength color code

Model number

Serial number

Wavelength

For more information about CWDM GBICs, including specifications, see Installing CWDM Gigabit Interface Converters, part number 212256-B.

Optical add drop multiplexer description

The passive CWDM optical add drop multiplexer (CWDM OADM) sends and receives signals to/from CWDM GBICs installed in the switch. It is set to a specific wavelength that matches the wavelength of the CWDM GBIC. It adds or drops this specific wavelength from the optical fiber and allows all other wavelengths to pass straight through. The Nortel Networks CWDM OADM supports two separate fiber pathways traveling in opposite directions (east and west) so that the network remains viable even if the fiber is broken at one point on the ring.

Bar code Interface type Fiber mode

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Figure 3 shows the single wavelength CWDM OADM network and equipment

side connections.

Installation and Networking Guidelines for Optical Routing

20 Chapter 1 Describing the optical routing system

RX TX

To Network

To CWDM GBIC

Single-wavelength OADM

TXRX

Equipment side

TXRX

To CWDM GBIC

To Network

The CWDM OADM (Figure 4) is installed in a 19-inch, rack-mounted 1RU optical shelf (Figure 15).

Figure 4 CWDM OADM Front Panel

Figure 3 CWDM OADM network and equipment side connections

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For information about installing a CWDM OADM, see “Inserting a CWDM

OADM or a CWDM OMUX” on page 38. For specifications, see “CWDM OADM specifications” on page 45.

Network add/drop ring application

The CWDM OADM pulls off a specific wavelength from an optical ring and passes it to a CWDM GBIC of the same wavelength in the switch, leaving all other wavelengths on the ring undisturbed. CWDM OADMs are set to one of eight supported wavelengths (Table 1).

Note: The wavelength of the CWDM OADM and the corresponding CWDM GBIC must match (see Table 1).

Chapter 1 Describing the optical routing system 21

Figure 5 shows an example of two separate fiber paths in a ring configuration

traveling in opposite or east/west directions into the network.

Figure 5 CWDM OADM ring configuration example

OFFICE

BUILDING B

OFFICE

BUILDING C

CARRIER

HOTEL SITE

PP 8600

OMUXOMUX

PP 8600

OADM

PP 8600

OFFICE

BUILDING A

OADM

For information on calculating network transmission distance, see Chapter2,

“Calculat ing transmis sion distance,” on page 27.

Optical multiplexer/demultiplexer description

The passive CWDM OMUX sends and receives signals to/from CWDM GBIC transceivers installed in the switch. It multiplexes and demultiplexes four or eight CWDM wavelengths from a two-fiber (east and west) circuit. It allows you to create uni-directional network traffic rings or point-to-point links.

The CWDM OMUX (Figure 6) is installed in a 19-inch, rack-mounted 1RU optical shelf (Figure 15).

Installation and Networking Guidelines for Optical Routing

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