7

Contents

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

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Nortel Networks 10396EA, 10292FA manual Contents