Which Avaya product is responsible for performing SIP Registration and Authentication?

The correct choice is Avaya Aura Session Manager because it plays a crucial role in managing SIP signaling and call control within the Avaya architecture. SIP Registration and Authentication are essential processes that enable endpoints to register with a SIP server and verify their identities. The Session Manager is specifically designed for SIP interoperability, handling communication sessions and ensuring that devices can connect and authenticate effectively.

Within the Avaya ecosystem, Session Manager is the component that provides centralized management for SIP entities, which includes processing SIP registration requests from endpoints and enforcing security through authentication measures. This functionality also allows it to manage different types of SIP users, ensuring that only authorized devices and users can connect to the system.

Other Avaya components, such as Communication Manager and System Manager, have important roles; however, they do not take the primary responsibility for SIP registration and authentication. Communication Manager is more focused on managing the core telephony features and call processing, while System Manager serves as an administration tool that provides management capabilities for the overall Avaya environment. The Avaya Aura Media Server is primarily focused on media processing tasks, such as handling media streams for calls, rather than on SIP registration and authentication processes.