| 摘要 |
The present invention provides a presence system capable of efficiently controlling the delivery of presence information for select individuals to a subscriber. Even if the subscriber has numerous individuals identified in a contacts list, only presence information for those individuals in an active list is provided to the subscriber. The active list can be relatively static or configured to change based on time and date, monitored events, availability of the subscriber, or other predefined criteria. The user can readily add or remove individuals from the active list in addition to selecting an inactive individual to monitor on an instantaneous basis, for a select period of time, until a successful communication occurs between the subscriber and selected individual, or until monitoring is no longer desired. The user can also issue one-time queries of typical or more detailed presence information about specific individuals.
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