Many modern computer communications networks employ cabling that data signals could be transmitted. Two common kinds of cabling are fiber cabling used to transmit optical signals and copper cabling accustomed to transmit electrical signals…

WDM (Wavelength Division Multiplexing) is a technique, utilizing a special property of fiber-optics. This property permits the mix of multiple signals onto an individual strand of fiber. Each signal is a member of a different wavelength, o…