This document provides information on bandwidth utilization techniques like multiplexing and spreading. It discusses different types of multiplexing including frequency-division multiplexing (FDM), wavelength-division multiplexing (WDM), synchronous time-division multiplexing (TDM), and statistical TDM. Examples are provided to illustrate how these techniques work and how to calculate key parameters like bandwidth, data rate, and duration when multiplexing multiple channels into a single link.