Patent ID: 7644181

Claim:
A method for routing a service request in a telecommunication system towards a destination user, the method comprising the steps of: a) storing a collection of identifiers related to a first identifier assigned to said user; b) receiving a service request that comprises said first identifier; c) obtaining a plurality of identifiers among said collection of identifiers, the identifiers all equally usable for routing said service request; d) selecting a second identifier among said plurality of identifiers; and e) routing said service request according to said selected second identifier; wherein at least one identifier among said plurality of identifiers stored in step a) has a format that comprises a user-name portion and a domain-name portion, wherein the user-name portion contains said first identifier; and in step d) said second identifier is selected having a format comprising a user-name portion and a domain-name portion, wherein said user-name portion contains said first identifier.