What do analog telephone adapters facilitate?

Analog telephone adapters (ATAs) are devices that enable traditional analog telephones to connect to digital communication networks, specifically Voice over Internet Protocol (VoIP) systems. By converting the analog signals from a standard phone into digital packets that can be transmitted over the internet, ATAs facilitate the use of conventional phones with modern digital services. This allows users to maintain their existing phone equipment while taking advantage of the benefits offered by digital communication, such as lower costs and enhanced features.

The other options presented, such as video calls over the internet, focus on different technologies that do not involve traditional phone systems. Wireless communication generally relates to mobile phones and other wireless technologies, which operate independently of ATAs. Enhanced audio quality might stem from various advancements in digital communication but is not a direct function of ATAs itself; their primary role is to bridge the gap between analog devices and digital networks.