Apparatus and method for directing a communication session to a communication device of a group of devices having a common registration identity

摘要

A device and method for controlling redirection of different media types associated with a communication session with more than one media type, the method comprising: while in an ongoing session between a first device (22) and a second device (24-1), wherein the ongoing session is connected via a network apparatus (28) having a back-to-back user agent (B2BUA 46), sending a request message, from the second device (24-1) to the network apparatus (28), the request message identifying a new media type to be added to the ongoing session and an address associated with a third device (24-2) where the new media type should be directed, such that messages for the new media type are directed by the B2BUA between the first device (22) and the third device (24-2).