Fiber broadband is to transfer the data from the electrical signal into optical signals for communication. At both ends of the fiber are equipped with "light cat" for signal conversion. Optical fiber broadband and ADSL access is the difference between: ADSL is the electrical signal transmission, optical fiber is the optical signal transmission. Fiber is the broadband network in a variety of transmission medium in the most ideal one, it is characterized by large transmission capacity, transmission quality, loss of small, long distance and so on.
Optical fiber transmission is the use of wavelength division multiplexing, that is, the district of multiple users of the data using PON technology convergence into a high-speed signal, and then modulated to different wavelengths of optical signals in a fiber transmission.