Compared to written notes, voice recording allows longer and more complex messages to be accurately relayed. The ability to leave detailed, private messages frequently means that callers can relay information without the need for a return call. This is especially useful when you consider that half of all calls are for one-way transfers of information.

Voice mail systems also guarantee a common messaging platform within a company. Features such as broadcasting allow employees to send messages to multiple people at once, allowing a voice mail system to serve as a central messaging center for a workgroup or the entire company.