Methods, apparatuses, and systems are described for selecting an access domain for receiving a speech and/or video call at a mobile station of a mobile communications network in which calls are routed via a central service control common to a plurality of access domains. In one method, a terminating mobile station receives an INVITE and then, if the access network supports neither simultaneous circuit switched (CS) and packet switched (PS) connections nor voice over internet protocol (VoIP), the terminating mobile station transmits a message indicating that a CS bearer is required for a session.