A voice communication system (VCS) integrates multiple means of communication into one system. While some ATS units (e.g. an AFIS or a Tower unit at a small airport) may find a simple telephone to be sufficient for their purposes, this is not usually the case with large ATC centres accommodating varying number of sectors or when several ATS units are located in the same facility (e.g. a Tower, Approach and Area control units).
While there is no standard about what a VCS should look like, what features are to be incorporated or how the human-machine interface should look like, the following is a list of commonalities found in most systems:
A generic example of a VCS layout is shown below: