The process of combining multiple transmissions into one composite signal is called:

The process of combining multiple transmissions into one composite signal is known as multiplexing. This technique is crucial in telecommunications and data communications as it allows for the efficient use of available bandwidth. By combining several signals into one, multiplexing enables multiple data streams to share a single communication channel without interference, optimizing the use of resources.

In practical terms, multiplexing can take different forms, such as Time Division Multiplexing (TDM), which allocates time slots for each signal, or Frequency Division Multiplexing (FDM), which assigns different frequency bands to each signal. This ensures that multiple channels can operate concurrently over a single medium, significantly enhancing the capacity and efficiency of communication systems.

Other terms in the question relate to different aspects of communication but do not define the process of combining signals. Transmission integrity pertains to the accuracy and consistency of data as it is sent and received, while communication integration refers more generally to the process of unifying various communication forms and channels rather than the specific technical process of signal combination. A demultiplexer, on the other hand, is the device used to separate a multiplexed signal back into individual signals, opposite of the multiplexing process.