Abstract: A method and system for enabling a set up of a service connection from a user equipment (UE) to a priority service is provided. The UE is not registered with an Internet Protocol Multimedia Subsystem (IMS) and the proxy node is a P-CSCF network node in the IMS. The proxy node receives a service request from the UE. The proxy node determines that the UE is not registered with IMS when the UE is not indicated as registered in the proxy node. The proxy node further identifies the service request as a priority service. The proxy node, when the service request has been identified as a priority service request and the UE has been determined to be not registered with the IMS, simulates setup of a terminating service connection to the priority service node by sending a terminating request to an I-CSCF network node included in the IMS.