Which service is primarily associated with Avaya Aura's IP telephony?

The service primarily associated with Avaya Aura's IP telephony is voice communications. Avaya Aura is designed to facilitate and manage voice communications over internet protocol (IP), which is a foundational element of its telephony services. This system enables businesses to conduct phone calls using a digital network rather than traditional analog phone lines, resulting in improved reliability, flexibility, and scalability.

Voice communications are at the heart of Avaya Aura's functionality, as the platform integrates various voice features—such as call control, voicemail, and unified messaging—allowing users to manage and route calls effectively. This capability is critical for organizations looking to enhance their communication systems and improve collaboration among employees.

Other services like video conferencing, fax transmission, and high-speed internet access, while they may be supported by Avaya's broader suite of offerings, do not specifically define the core of IP telephony, which is fundamentally about voice communication.