Avaya Aura® Communication Manager (CM) is the core call-processing component of the Avaya Aura® Platform. It serves as the foundation for real-time voice and video communications, providing a comprehensive and powerful set of over 700 telephony features. For SIP users, CM acts as a feature server, applying capabilities such as call forwarding, multi-party conferencing, call coverage, and hunt groups. While other components handle routing and media, CM is the engine that delivers the rich feature set that defines and enhances the end-user's communication experience.

A. Application Enablement Services (AES): AES is a server that provides Application Programming Interfaces (APIs) for third-party applications to access CM's capabilities; it does not directly provide features to the end-user.

B. Avaya Aura System Manager (SMGR): System Manager is the centralized web-based management platform for configuration, administration, and maintenance of the Avaya Aura® suite, not a feature-providing entity.

D. Avaya Aura Media Server (AAMS): AAMS is a media processing resource. It provides services like audio tones, announcements, and conferencing bridges but does not deliver the call control logic or telephony features.

1. Avaya Aura® Communication Manager Overview and Specification, 03-603580, Issue 13, May 2018.

Page 13, Section "Communication Manager overview": "Avaya Aura® Communication Manager is the open, highly-reliable, and extensible IP Telephony foundation... Communication Manager provides more than 700 powerful people-centric communication features." This directly identifies CM as the source of end-user features.

2. Avaya Aura® Solution Description, 02-602658, Issue 10.0, November 2017.

Page 20, Section "Avaya Aura Communication Manager": "Communication Manager is the core of the Avaya Aura Platform, providing the foundation for real-time voice and video communications... It provides a rich set of features for call control..."

3. Avaya Aura® Application Enablement Services Overview and Specification, 02-300360, Issue 11.0, November 2017.

Page 9, Section "Introduction": "Application Enablement Services is a software platform that provides an enhanced set of Application Programming Interfaces (APIs)... These APIs provide access to the powerful call processing and telephony capabilities of Avaya Aura® Communication Manager." This clarifies AES's role as an integration layer, not a feature source.

4. Administering Avaya Aura® System Manager, NN43001-701, Issue 11.01, November 2018.

Page 21, Section "System Manager overview": "System Manager is a centralized, secure, web-based management solution that provides a set of shared management services and a common management framework for Avaya Aura® and other Avaya products." This defines SMGR's role as purely administrative.