A communication system includes a service responsible for sending signaling to a user equipment or an access network serving the user equipment. The service receives a request to send the signaling to the user equipment or the access network together with access type control information indicating whether the signaling is transmittable using any of a plurality of access types or a specific access type provided in the request. The service selectively forwards the signaling to the user equipment or the access network based on the access type control information.