Which protocol is fundamental for signaling in Avaya Aura communications?

The fundamental protocol for signaling in Avaya Aura communications is the Session Initiation Protocol (SIP). SIP is specifically designed to create, modify, and terminate sessions in an Internet Protocol (IP) network. This includes not only voice and video calls but also other types of multimedia communication. SIP facilitates the setup of these sessions by supporting various functions such as user location, session management, and feature negotiation.

In the context of Avaya Aura, SIP is a cornerstone of its architecture, enabling various components within the system to communicate efficiently and to manage real-time communications. The robustness and flexibility of SIP allow Avaya solutions to integrate seamlessly with other systems and devices, making it preferable over other protocols that serve different purposes, such as HTTP, which is used for web content transfer; FTP, designed for file transfers; and PPP, primarily for direct point-to-point connections.