N-GEN Communications Web-based Seminars ©NGCS

Seminar - An Overview of Communications Technologies

Module 5 - SONET, WDM, DWDM and B-ISDN Technologies                                                              Slide 67 of 76 _________________                                                                                  __________

                                          WDM Capabilities

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Carriers began using systems transmitting 4 and then 8 wavelengths thus increasing the single fiber capacity to 40 - 80 G bps. These systems are also known as Dense Wave Division Multiplexing (DWDM) systems.