Nortel Networks 10292FA, 10396EA manual An optical wavelength band for WDM optical communications

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62Glossary

each signal level thereafter operates at a speed divisible by that number. For example, OC-3 operates at 155.52 Mbit/s.

OC-1

optical carrier - level 1

An optical SONET signal at 51.84 Mbit/s.

OC-3

optical carrier - level 3

An optical SONET signal at 155.52 Mbit/s.

OC-12

optical carrier - level 12

An optical SONET signal at 622.08 Mbit/s.

OMUX

optical multiplexer

An optical multiplexer/demultiplexer that multiplexes and demultiplexes four or eight CWDM wavelength channels from a two-fiber circuit.

optical channel

An optical wavelength band for WDM optical communications.

optical fiber

Very thin strands of pure silica glass through which laser light travels in an optical network. Consists of a core surrounded by a less refractive index cladding.

optical seam

An optical seam occurs at any site in a network when there is no optical passthrough, that is, where information is dropped from but not added onto the ring.

Optical Time Domain Reflectometer (OTDR)

Device used to inspect optical fiber links by sending optical pulses down them and monitoring the light reflected back to the device. Can calculate overall fiber attenuation and highlight points of loss in the fiber, or even fiber breaks.

212257-B

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Contents Installation and Networking Guidelines for Optical Routing Copyright 2002 Nortel Networks 212257-BInstallation and Networking Guidelines for Optical Routing Canada requirements onlyNortel Networks Inc. software license agreement Installation and Networking Guidelines for Optical Routing 212257-B Contents Chapter Installing the shelf, OADM, and Omux ContentsFigures Figures 212257-B Tables Tables 212257-B Preface Component FunctionPreface Before you beginHard-copy technical manuals How to get help Technical Solutions Center TelephonePreface 212257-B Chapter Describing the optical routing system Wavelength division multiplexingDescribing the optical routing system Parts of the optical routing systemGigabit interface converter description Parts of the optical routing systemOptical add drop multiplexer description Cwdm Gbic transceiver and labelNetwork add/drop ring application Cwdm Oadm network and equipment side connectionsCwdm Oadm ring configuration example Optical multiplexer/demultiplexer descriptionCwdm OMUX-4 Cwdm Omux in a point-to-point application Cwdm OMUX-8 network and equipment side connectionsCwdm Omux point-to-point configuration example Cwdm Omux in a ring applicationCwdm Omux ring configuration example Describing the optical routing system 212257-B Chapter Calculating transmission distance About transmission distance and optical link budgetCalculating transmission distance How to calculate expected loss budgetHow to calculate maximum transmission distance Point-to-point network configuration example Point-to-point transmission distancePoint-to-point maximum transmission distance calculations Point-to-point signal loss valuesMesh ring transmission distance Mesh ring network configuration Mesh ring signal loss values Mesh ring maximum transmission distance calculationsHub and spoke network configuration Hub and spoke transmission distanceHub and spoke signal loss values Hub and spoke maximum transmission distance calculationsExceeding class 1 power level warning Chapter Installing the shelf, OADM, and OmuxPreparing for installation Electrostatic discharge Installing the shelf, OADM, and OmuxEnvironmental and physical requirements Installing the shelf Inserting a Cwdm Oadm or a Cwdm Omux Shelf with plug-in module in 19-inch rackCabling a Cwdm Oadm or a Cwdm Omux Cabling a Cwdm OadmCabling a Cwdm Oadm Cabling a four-channel Cwdm Omux Cabling a Cwdm OMUX-4Cabling an eight-channel Cwdm Omux Cabling an Cwdm OMUX-8 Removing a Cwdm Oadm or a Cwdm Omux Appendix a Cwdm Oadm specifications Cwdm Oadm specificationsAppendix a Cwdm Oadm specifications 212257-B Appendix B Cwdm Omux specificationsCwdm Omux specifications Appendix B Cwdm Omux specifications 212257-B Appendix C Handling and cleaning fiber optic equipment PrecautionsTools and Materials Cleaning Fiber Optic ConnectorsAppendix C Handling and cleaning fiber optic equipment Cleaning Single SC and FC Connectors Cleaning Duplex SC Connectors Cleaning Receptacle or Duplex Devices Page Glossary Glossary Dwdm See optical fiber Group of circuits connected at one point on a network See MMF Ndsf An optical wavelength band for WDM optical communications Device that does not require a source of energy to function See SMF WDM Glossary 212257-B Index Cwdm OmuxIndex OMUX, CwdmIndex Index 212257-B