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Seminar - An Overview of Communications Technologies


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Module 5 - SONET, WDM, DWDM and B-ISDN Technologies                                                              Slide 65 of 76 _________________                                                                                  __________

                                      A WDM Concept

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A WDM concept is to multiplex two waves to increase the optical fiber transmission capability to 20 G bps. In the 1980s WDM systems used 1310 and 1550 nm wavelengths to double the traffic capacity.