Patent ID: 8320546

Claim:
A method of receiving a communication event from a calling entity located in a communication system comprising a first network and a second network, at a receiving device associated with a user located in the communication system, the method comprising; associating a first identity recognisable in the first network with a second identity recognisable in the second network for both the user and the calling entity at a data store located in the second network; providing the first and second identities for the calling entity to the receiving device via the second network; receiving at a node in the second network associated with the user, the communication event together with the second identity for the calling entity via the second network, wherein the communication event is addressed with the second identity of the user; querying the data store with (i) the second identity of the calling entity received at said node, and (ii) the second identity of the user with which the communication event is addressed, to determine the first identity of the calling entity and the first identity of the user; receiving at the receiving device associated with the user the communication event together with the determined first identity for the calling entity via the first network, wherein the communication event is addressed with the determined first identity of the user; and determining the second identity of the calling entity at the receiving device associated with the user using said received first identity for the calling entity and said provided first and second identities for the calling entity.