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Avaya Aura® Presence Services provides the presence of a user through the presence states. For example, busy, away, or Do Not Disturb. The presence is an indication of the availability of a user and the readiness to communicate across services, such as telephony, instant messaging (IM), and video.
The presentity is the visibility of a user on a shared communication network. The users who are a part of the presentity group have access to the presence status of another user. A watcher is a user who monitors the presentity of another user. The watcher must subscribe to Presence Services to receive presence updates for a presentity.
Presence Services supports collecting presence information from diverse sources. This information is aggregated for a user and then made available to the presence-aware applications. These applications use Local Presence Service (LPS) to subscribe to Presence Services. When an application subscribes to Presence Services, the application receives presence change notifications that contain the aggregated presence for a user and the communication resources available to the user. Using this information, the application can provide a visual indication about the presence of the user.
Presence Services supports:
The presence aggregation service that collects the presence information from Avaya and third-party sources and distributes the presence information to the Avaya tools.
The aggregation of presence information from a variety of Avaya endpoints, including one-X® clients.
The Extensible Messaging and Presence Protocol (XMPP).
Presence Services is compatible with the client software from Microsoft®, IBM® Domino®, and open source. Presence Services uses the following collectors to enable the users to use the core Presence Services capabilities with other presence sources:
AES Collector: To collect telephony presence information from nonpresence-capable devices such as H323, DCP, and SIP endpoints administered as OPTIM extensions.
Exchange Collector: To collect the calendar and out-of-office information from Exchange mailboxes.
Domino Collector: To collect the calendar and out-of-office information from Domino mailboxes.