Patent ID: 7620391

Claim:
A computer-implemented method for communication, comprising: assigning to at least first and second communication terminals of a communication system at least respective first and second private identities and a common public identity different from at least the first and second private identities; storing an association between the private identities and the common public identity in a Convergence Server (CS) connected to the communication system; maintaining at least one of first and second registration records, which respectively represent the first and second private identities, in a database of the communication system that is separate from the CS; simultaneously with the at least one of the first and second registration records, maintaining in the database an additional registration record, which represents the common public identity and comprises an identification of the CS as a Visitor Location Register (VLR) of the common public identity; receiving at the database a request to set up a call in which the public identity serves as one of a source and a destination of the call; based on the identification of the CS as the VLR of the common public identity by the additional registration record, querying the association stored in the CS in order to identify one or more of the private identities that is to participate in the call; and establishing the call between a third communication terminal and one of at least the first and second communication terminals using the registration records of the private identities identified using the queried association.