In communications networking fiber multiplexer is one of the most important components. From the network manager’s viewpoint, its central function is to concentrate many users on a single transmission channel so that it can maximize the efficiency of that channel: in almost every aspect of networking digital data, voice, and video it is used. This section will tell you about the advantages and disadvantages of different data multiplexing techniques, about why these different techniques were evolved to solve particular network engineering problems.
The bandwidth properties of optical fiber are very well known and they make it to the media of choice for high-speed data and video applications. However, to take advantage of this bandwidth various forms of multiplexing are required. The two most commonly used are time-division and wavelength division multiplexing. In fiber optics, we refer to attenuation as a transmission loss. It is the decrease in light signal intensity as per the distance covered by the signal in a transmission medium.
Multiplexer interfacing is not very much easy as it is for analog switches. To control multiplexer digital video manufacturers can write interfaces, although this is not commonly done.
Fiber adapter will allow the digital video system to display the output of the multiplexer like it were itself a video camera. When this is completed, it will become necessary to control the multiplexer, which can even be performed through the multiplexer’s data control input. Under a single remote keyboard command, maximum multiplex manufacturers make accessory products that can allow the networking of their multiplexers.
In two ways the available bandwidth can be used in a transmission channel: At first into a subset of frequencies fiber splitter divides the available bandwidth frequency spectrum. Secondly, for each channel, it allocates all the available bandwidth for a fixed discrete period. As an analog solution to multiplexing, FDM is primarily used, for example in telephony it has been used extensively; indeed many of the FDM standards and techniques such as the multiplexing ratios said by the early designs of telephone exchange multiplexers are in evidence in a few of the latter digital exchanges.
