Based on current trends in mobile broadband usage, a spectrum-demand model developed by Rysavy Research shows that many operators, spectrum could be consumed within three to five years. Except for the optical fiber, the available bandwidth of all contemporary communication media is restricted and therefore every endeavour to make optimum use of the communication channel sustains its undebatable importance. With the proliferation of telecommunications, it was realized that the major traffic was that of telephonic voice communication, and the extent of possible channel utilization with voice signal was studied. It was established that the order of utilization is only of 36%, the remaining 64% being wasted in a duplex channel. Various techniques for enhancing channel utilization in wired and mobile communication have been discussed in this book.