Which solution is used to integrate PSTN services seamlessly with Avaya?

The integration of Public Switched Telephone Network (PSTN) services with Avaya systems is primarily achieved through the use of the Avaya Aura Media Gateway. This component is designed to connect traditional telephony systems with Avaya's VoIP infrastructure, facilitating the communication flow between various types of networks.

The Media Gateway provides the necessary conversion of voice and signaling between analog and digital formats, allowing seamless communication. It serves as a bridge that enables PSTN calls to be routed effectively to and from Avaya's application servers, such as the Communication Manager. This capability is essential for businesses that wish to leverage existing PSTN services while transitioning to or incorporating Avaya's advanced telephony features.

While other components like the Session Manager and Communication Manager play vital roles in the overall Avaya ecosystem—ensuring call routing, handling user sessions, or managing media—it's the Media Gateway that directly addresses the integration with PSTN infrastructure. Thus, the selection of the Avaya Aura Media Gateway as the solution emphasizes its specific function in managing the interface between PSTN services and Avaya's systems.