These all support the basic requirement of seamlessly integrating
or enhancing existing services through the inclusion of presence information.
Presence-enabled services may be classified broadly as:
??? Information.sharing.services: These help to determine the most appropriate means
of contacting another end user/device. For example, if end users do not have their
instant messaging client active, their colleagues might send an e-mail. In more complex
scenarios, the presence server can collect and forward presence information across a
variety of end user devices. Another instance may be where an employee may have
multiple presence clients such as a wireless phone, a VoIP soft-client, an instant
messaging client, and so forth, and the most appropriate means to contact him/her
can be found given the nature of the communication, priority, time schedules, and
work/availability status.
??? Service-enabling: Presence information allows service providers to automatically
re-route high priority incoming communication sessions.
Various.Types.of.Presence-Enabled.Services.
Examples of presence-enabled services include: call services like Presence-Enabled Call
Pick Up, which is a wire-line call pick-up service that allows multiple employees/groups
or remote workers to answer each others??™ phones, and Presence-Enabled Call Distribution,
which is a centralized call distribution system that subscribes to the presence and availability
status of the devices across multiple switching systems and PBXs.
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