PERFORMING A TEST OF AN EMERGENCY CALL (OR QUALITY MANAGEMENT FUNCTIONALITY) BASED ON A PREDEFINED TEST IDENTIFIER USED FOR INITIATING A CORRESPONDING PACKET-SWITCHED CALL BY A TEST MOBILE COMMUNICATION DEVICE REGISTERED WITH A PRIVATE OR NON-PUBLIC MOBILE COMMUNICATION NETWORK

The invention relates to a method for performing a test of an emergency call or quality management system or an emergency call or quality management functionality, wherein the emergency call or quality management system or the emergency call or quality management functionality is used in the presence or at least the vicinity of both a mobile communication network being a public land mobile network and using a first mobile network code identity, and a further mobile communication network being a private or non-public network, especially a campus network, and using a second mobile network code identity, the mobile communication network comprising an access network, a core network, and one or a plurality of base station entities, and the mobile communication network comprising or being associated with or being able to access a plurality of operative public safety answering points or a plurality of operative public safety answering point functionalities, wherein the mobile communication network and the further mobile communication network are packet switched networks and the emergency call or quality management system or the emergency call or quality management functionality is configured to handle IP multimedia subsystem based packet switched emergency calls and/or session initiation protocol based packet switched emergency calls,wherein at least one test mobile communication device is able to establish a radio link with or to register via either one of a base station entity of or associated to the access network, using the first mobile network code identity, and a base station entity or a base station entity part of or related to or assigned to the further mobile communication network, using the second network code identity,wherein in order to perform a test of the emergency call or quality management system or the emergency call or quality management functionality, at least one test identification identifier is predefined for being used to perform the test of the emergency call or quality management system or the emergency call or quality management functionality, and the method comprises the following steps:-- in a first step, the at least one test mobile communication device registers with the further mobile communication network, using the second network code identity,-- in a second step, subsequent to the first step, an emergency call or quality management call is initiated or performed by the at least one test mobile communication device, thereby using