The process in which low-capacity communications channels are combined into a single channel is known as what?

Multiplexing is the correct term for the process of combining multiple low-capacity communications channels into a single channel. This technique allows multiple signals to be transmitted over a shared medium simultaneously, making efficient use of available bandwidth. By employing multiplexing, communication systems can optimize resource use and enhance data transmission capabilities without requiring additional physical infrastructure.

There are various types of multiplexing, such as time-division multiplexing (TDM) and frequency-division multiplexing (FDM), each utilizing different approaches to organize and transmit multiple signals. The result is an efficient way to maximize data throughput and improve communication effectiveness in environments with limited capacity.

Other options like channelization, wavelength division, and signal aggregation refer to different concepts. Channelization typically pertains to the allocation of specific frequency bands to different channels, while wavelength division specifically relates to optical communications and is a type of multiplexing focused on multiple light wavelengths. Signal aggregation might imply the process of gathering signals for processing but does not specifically encapsulate the idea of combining multiple channels into one for transmission. Therefore, multiplexing accurately describes the intended process in the question.