Patent ID: 6185288
Filing Date: 2001-02-06
Classification: H04L,H04M,H04Q

Abstract:
A multimedia call signalling method comprising the steps of:a) a calling agent receiving from a calling terminal of a first user served by the calling agent a call setup request containing a called user identifier and looking up an electronic network address associated with the called user identifier;b) the calling agent sending a call setup electronic message with said electronic network address to a called agent;c) the called agent maintaining a user profile database comprising for each of a plurality of users served by the called agent a respective plurality of terminal identifiers of terminals of the user, each plurality of terminal identifiers identifying terminals of at least two different protocol types;d) the called agent associating with each of the plurality of users served by the called agent a selection of a current terminal at which the user expects calls to be directed;e) the called agent receiving the call setup electronic message and associating the call setup message with a particular user of said plurality of users served by the called agent, and the called agent looking up the current terminal associated with the particular user; andf) the called agent and the calling agent coordinating a call setup between a calling terminal and the current terminal associated with the particular user thereby resulting in a connection between the calling terminal and the current terminal.