Question : DWDM question

Hello Everyone,

I need to know the advantages and disadvantages of using DWDM transmission technique.  Please include links to where this information can be found.  Please focus on disadvantages.  I can't find any information on disadvantages of DWDM.

Thanks,
Dmitriy

Answer : DWDM question

PAQed, with points refunded (100)

Computer101
E-E Admin