Integration of voice service in ims services.

摘要

Procedure to allow voice telecommunication services provided by a mobile communication network to a subscriber (3) of an IP multimedia subsystem, IMS, (1) in which the IMS subscriber within an IMS domain is assigned a standard subscription to a mobile communication network (2) that operates with the IMS, in which in addition to the standard subscription, the subscriber (3) IMS is assigned a routing prefix, in which an incoming voice call is routed to the subscriber ( 3) IMS according to the routing prefix, characterized in that the subscriber (3) IMS is assigned an additional identifier in its subscription data indicating an IMS subscription.