What does multiplexing allow in communication systems?

Multiplexing is a critical technique in communication systems that enables the combination of multiple signals onto a single communication channel. This capability is fundamental for efficient use of bandwidth, as it allows various types of data—such as voice, video, and other signals—to be transmitted simultaneously without interference. By utilizing multiplexing, communication systems can increase the amount of information sent over a given medium, thereby maximizing the available resources and reducing costs.

The other aspects mentioned, like improved audio quality, signal isolation, and extended range of communication, are not directly related to the primary function of multiplexing. While they might contribute to the overall performance of a communication system, they are not the defining characteristics of multiplexing itself. Thus, the correct understanding of multiplexing centers around its ability to efficiently manage multiple signals within a single channel.