The following depicts the Avaya Aura® architecture and various components of Avaya Aura®:

A standard Avaya Aura® architecture consists of the following core components:

• Avaya Aura® System Manager

• Avaya Aura® Session Manager

• Avaya Aura® Communication Manager

• Avaya Aura® Application Enablement Services

• Avaya Aura® Media Server

• Avaya Aura® Presence Services

System Manager provides a common console to manage the Avaya Aura® applications. System Manager also enables to bulk import and export users, including user profiles and global settings such as public contacts lists, shared addresses, and presence access control lists.

Session Manager provides core SIP routing and integration services that provide communication between SIP-enabled entities, for example, PBXs, SIP proxies, gateways, adjuncts, trunks, and applications across the enterprise. Session Manager is configured from System Manager and uses centralized, policy-based routing to provide integration services. It also sends and receives SIP notifications and SIP Publish messages to and from various endpoints and Presence Services.

Endpoints registered to Session Manager use Communication Manager for feature support. Endpoints that use H.323 protocol register to Communication Manager over IP. Digital and analog endpoints are directly connected to their respective digital and analog media modules on a Branch Gateway, for example, G450.

Communication Manager is an extensible, scalable, and secure telephony application that connects to private and public telephone networks, ethernet LANs, and the internet. Communication Manager organizes and routes voice, data, image, and video transmissions.

Application Enablement Services is a software platform that leverages the capabilities of Avaya Aura® Communication Manager to enterprise applications. By using Application Enablement Services, the Application Enablement Services Collector component within Presence Services enables Presence Services to report telephony presence from Communication Manager endpoints. The Application Enablement Services Collector collects Presence from H323, DCP, analog, and SIP telephones administered as OPTIM extensions.

The Avaya Aura® Media Server delivers advanced multimedia processing features to a broad range of products and applications. Utilizing the latest open standards for media control and media processing, the highly scalable software based solution deploys on standard server hardware, running Linux or Windows operating systems.

Presence Services collects, aggregates, and publishes presence information from and to multiple sources and clients.