Presence information method and system

Details Presence information method and system Presence information method and system

H - Electricity

04

M

H04M 3/42 (2006.01) H04M 3/22 (2006.01) H04Q 3/00 (2006.01) H04Q 3/42 (2006.01)

Patent

CA 2346760

A method of operating an availability service in a telecommunication system (1) interconnecting a legacy telephone system (10) with at least one presence system (11), said legacy telephone system including a plurality of terminals (T1...T10), at least some (T1,T2) of which are terminals of subscribers to said availability service, said method including: (a) continuously monitoring each subscriber terminal (T1,T2) 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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