Unwanted Problems Encountered Discussion Limitations Of Network Design

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Limits of 10Gbps transmission

• Attenuation limit at ~80km
  • Can be overcome using Erbium Doped Fibre Amplifiers (EDFAs) to reach spans of hundreds kms
• Dispersion limit at ~80km
  • Can be overcome using NZ-DSF and dispersion compensation methods to reach spans of hundreds of kms
• Polarisation Mode Dispersion limit at ~400km
  • Cannot easily be compensated. Regeneration required at this limit.