In order to maintain the reach of a typical 100G WAN transport system(~1500 km),several system improvements have to be made to recover the lost(1),including the use of low-loss low-nonlinearity(2),Raman amplification,and stronger error correction.
(1)
A.noise
B.SNR
C.speed
D. eeor
(2)
A.optical fiber
B.traffic
C.internet
D.signaling