Nortel Networks 10292FA, 10396EA manual See MMF

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60Glossary

loss budget

The amount of optical power launched into a system that will be lost through various mechanisms, such as insertion losses and fiber attenuation. Usually given in dB.

MAN

metropolitan area network

A MAN consists of LANs interconnected within a radius of approximately 80 km (50 miles). MANs typically use fiber-optic cable to connect LANs.

margin

The amount of loss, beyond the link budget amount, that can be tolerated in a link.

MMF

multimode fiber

A fiber with core diameter much larger than the wavelength of light transmitted that allows many modes of light to propagate. Commonly used with LED sources for lower speed, short distance lengths. Typical core sizes (measured in microns) are 50/125, 62.5/125 and 100/140.

mode

An independent light path through an optical fiber. See SMF and MMF.

multimode fiber

See MMF.

multiplexing

Carriage of multiple channels over a single transmission medium; any process by which a dedicated circuit can be shared by multiple users. Typically, data streams are interspersed on a bit or byte basis (time division), or separated by different carrier frequencies (frequency division).

MUX

multiplexer

A device that combines two or more signals into a signal composite data stream for transmission on a single channel.

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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 FunctionBefore you begin Hard-copy technical manualsPreface 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 expected loss budget How to calculate maximum transmission distanceCalculating transmission distance Point-to-point network configuration example Point-to-point transmission distancePoint-to-point signal loss values Mesh ring transmission distancePoint-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 calculationsChapter Installing the shelf, OADM, and Omux Preparing for installationExceeding class 1 power level warning Installing the shelf, OADM, and Omux Environmental and physical requirementsElectrostatic 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 PrecautionsCleaning Fiber Optic Connectors Appendix C Handling and cleaning fiber optic equipmentTools 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