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Advantage and disadvantage of DWDM.
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Advantage

  • Every wavelength is independent of others
  • Optical amplifier can act on all wavelengths, providing cost savings over a single amplifier per fiber.
  • The capability to support 160 wavelengths means that over 1Tbps of traffic can be used.
  • Each wavelength can be a different traffic type such as SONET, gigabit, Ethernet or IP can be operated at different speeds.
  • This provides Bandwidth and protocol flexibility with payload efficiency.

Disadvantage

  • Some fiber plants are not suitable for DWDM
  • Vendor Inter-operability issues exist
  • DWDM systems can be extremely difficult to troubleshoot, manage and provision.
  • Service providers typically run SONET over DWDM to utilize SONETS’s network management capabilities but DWDM equipment’s need to be managed.
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