Nortel Networks 10396EA, 10292FA manual Point-to-point transmission distance

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Chapter 2 Calculating transmission distance 29

Procedure

To calculate the maximum transmission distance for a proposed network configuration:

1Identify all points where signal strength will be lost.

2Calculate the expected loss for each point.

3Find total passive loss by adding the expected losses together.

4Find remaining signal strength by subtracting passive loss, and system margin from total system budget.

5Find maximum transmission distance by dividing remaining signal strength by expected fiber attenuation/km.

Point-to-point transmission distance

The following factors affect signal strength, and determine point-to-point link budget and maximum transmission distance for the network in Figure 11:

•CWDM OMUX mux loss

•CWDM OMUX demux loss

•Fiber attenuation

The Ethernet switch host does not have to be near the CWDM OMUX, and the CWDM OMUX does not regenerate signal. Therefore, maximum transmission distance is from GBIC to GBIC.

Figure 11 Point-to-point network configuration example

Transmission Distance

(GBIC to GBIC)

		OMUX-8		OMUX-8
GBIC					GBIC

Installation and Networking Guidelines for Optical Routing

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Contents Installation and Networking Guidelines for Optical Routing 212257-B Copyright 2002 Nortel NetworksCanada requirements only Installation and Networking Guidelines for Optical RoutingNortel Networks Inc. software license agreement Installation and Networking Guidelines for Optical Routing 212257-B Contents Contents Chapter Installing the shelf, OADM, and OmuxFigures Figures 212257-B Tables Tables 212257-B Component Function PrefacePreface Before you beginHard-copy technical manuals Technical Solutions Center Telephone How to get helpPreface 212257-B Wavelength division multiplexing Chapter Describing the optical routing systemGigabit interface converter description Parts of the optical routing systemDescribing the optical routing system Parts of the optical routing systemCwdm Gbic transceiver and label Optical add drop multiplexer descriptionCwdm Oadm network and equipment side connections Network add/drop ring applicationOptical multiplexer/demultiplexer description Cwdm Oadm ring configuration exampleCwdm OMUX-4 Cwdm OMUX-8 network and equipment side connections Cwdm Omux in a point-to-point applicationCwdm Omux in a ring application Cwdm Omux point-to-point configuration exampleCwdm Omux ring configuration example Describing the optical routing system 212257-B About transmission distance and optical link budget Chapter Calculating transmission distanceCalculating transmission distance How to calculate expected loss budgetHow to calculate maximum transmission distance Point-to-point transmission distance Point-to-point network configuration examplePoint-to-point maximum transmission distance calculations Point-to-point signal loss valuesMesh ring transmission distance Mesh ring network configuration Mesh ring maximum transmission distance calculations Mesh ring signal loss valuesHub and spoke transmission distance Hub and spoke network configurationHub and spoke maximum transmission distance calculations Hub and spoke signal loss valuesExceeding 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 Shelf with plug-in module in 19-inch rack Inserting a Cwdm Oadm or a Cwdm OmuxCabling a Cwdm Oadm Cabling a Cwdm Oadm or a Cwdm OmuxCabling a Cwdm Oadm Cabling a Cwdm OMUX-4 Cabling a four-channel Cwdm OmuxCabling an eight-channel Cwdm Omux Cabling an Cwdm OMUX-8 Removing a Cwdm Oadm or a Cwdm Omux Cwdm Oadm specifications Appendix a Cwdm Oadm specificationsAppendix a Cwdm Oadm specifications 212257-B Appendix B Cwdm Omux specificationsCwdm Omux specifications Appendix B Cwdm Omux specifications 212257-B Precautions Appendix C Handling and cleaning fiber optic equipmentTools 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 Cwdm Omux IndexOMUX, Cwdm IndexIndex Index 212257-B