Presence information method and system
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United States of America Patent
Stats
-
Mar 2, 2004
Grant Date -
Dec 20, 2001
app pub date -
May 15, 2001
filing date -
May 17, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method of operating an availability service in a telecommunication system interconnecting a legacy telephone system with at least one presence system, said legacy telephone system including a plurality of terminals (T.sub.1 . . . T.sub.10), at least some (T.sub.1,T.sub.2) of which are terminals of subscribers to said availability service, said method including: (a) continuously monitoring each subscriber terminal (T.sub.1,T.sub.2) for a change of a call status of said subscriber terminal from the presence of a call to the absence of a call; (b) generating a first or 'high availability' signal when said call status of said subscriber terminal changes from said presence of a call into said absence of a call; (c) monitoring an interval of time beginning with said first signal; (d) generating a second or 'availability unknown' signal after a predetermined time period .tau. within said interval; and (e) making said availability signals accessible to any interconnected presence system.
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