Nortel Networks 10292FA, 10396EA manual See SMF

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64Glossary

single-mode fiber

See SMF.

SMF

A mode is one of the various light waves that can be transmitted in an optical fiber. Each optical signal generates many different modes, but in single-mode fiber the aim is to only have one of them transmitted. This is achieved through having a core of a very small diameter (usually around 10 micrometers), with a cladding that is usually ten times the core diameter. These fibers have a potential bandwidth of 50 to 100 GHz per kilometer.

Tx

transmit

A device that includes a LED or laser source and signal conditioning electronics that is used to inject a signal into optical fiber.

U

(vertical) unit

One U is 1.75 inches. Standard equipment racks have bolt holes spaced evenly on the mounting rails to permit equipment that is sized in multiples of this vertical unit to be mounted in the same rack.

WAN

wide area network

A physical or logical network that provides data communications to a larger number of independent users than are usually served by a LAN and is usually spread over a larger geographic area than that of a LAN.

wavelength

All electromagnetic radiation (radio waves, microwaves, ultraviolet light, visible light, etc.) is transmitted in waves, and the wavelength is the distance between the successive crests of the waves. In optical networks, you can think of different wavelengths as being different colors of light. Wavelengths of light are measured in nanometers or microns.

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 FunctionHard-copy technical manuals Before you beginPreface How to get help Technical Solutions Center TelephonePreface 212257-B Chapter Describing the optical routing system Wavelength division multiplexingParts of the optical routing system Gigabit interface converter descriptionDescribing the optical routing system 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 budgetHow to calculate maximum transmission distance How to calculate expected loss budgetCalculating transmission distance Point-to-point network configuration example Point-to-point transmission distanceMesh ring transmission distance Point-to-point signal loss valuesPoint-to-point maximum transmission distance calculations 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 calculationsPreparing for installation Chapter Installing the shelf, OADM, and OmuxExceeding class 1 power level warning Environmental and physical requirements Installing the shelf, OADM, and OmuxElectrostatic discharge 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 Cwdm Omux specifications Cwdm Omux specificationsAppendix B Appendix B Cwdm Omux specifications 212257-B Appendix C Handling and cleaning fiber optic equipment PrecautionsAppendix C Handling and cleaning fiber optic equipment Cleaning Fiber Optic ConnectorsTools and Materials 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