The availability of information depend on the transmission speed of data, voice, and multimedia across telecommunication networks. Despite new technologies that enable legacy copper telephone lines to carry information more efficiently, optical networks remain the most ideal medium for high-bandwidth communications. There are two distinct modes of optical communications: (1) fibre optics (fibre optic cable), and (2) optical wireless, based on free-space optics technology. For long-distance network deployments, nothing is better than fibre. When coupled with the wavelength division multiplexing technologies, fibre optic cables are capable of carrying information more densely across the globe. Optical fibre communications technology became available to bring the connection to the residential areas.