Avaya IX™ Messaging (now Avaya Aura® Messaging) is a native Session Initiation Protocol (SIP) application that operates within the Avaya Aura® core architecture. In this architecture, Avaya Aura® Session Manager serves as the central SIP registrar and routing engine. For the integration of legacy CallPilot Contact Center features, Session Manager is essential to manage the SIP signaling between Avaya Aura® Communication Manager, the Contact Center application, and the Avaya IX™ Messaging platform. It acts as the necessary intermediary for call control and feature invocation, making it a general requirement for the integration to function.

A. A standard deployment of Session Manager is sufficient; no specific or special version is mandated for this particular integration.

C. Joint Interoperability Test Command (JITC) certification is a requirement for specific U.S. Department of Defense deployments and is not a general prerequisite for this feature.

D. Session Manager is a fundamental and mandatory component for all SIP-based application integration and call routing within the Avaya Aura® ecosystem.

1. Avaya Aura® Messaging Implementation and Integration, Release 7.1, December 2016 (Document ID: NN42001-701). Chapter 2: "Architecture," section "Avaya Aura® Messaging in the Avaya Aura® environment," pp. 21-23. The architectural diagrams and descriptions consistently show Session Manager as the central SIP entity through which all call-related signaling to and from the messaging servers is routed.

2. Avaya Aura® Solution Description, November 2018. Chapter: "Avaya Aura® Architecture." This document describes Session Manager as the "core of Avaya Aura®" and the primary "SIP routing hub," establishing its non-negotiable role for integrating SIP applications like Avaya IX™ Messaging.

3. Administering Avaya Aura® Session Manager, Release 8.1, November 2020 (Document ID: NN43001-711). Chapter 1: "Session Manager overview," section "Session Manager in the Avaya Aura® network." This section details Session Manager's role in connecting and managing SIP entities, which is the mechanism used for the CallPilot Contact Center feature integration.