Method for performing a test of an emergency call system, wherein the emergency call system is used with a mobile communication network, at least one mobile communication device being connected to the mobile communication network, wherein the mobile communication network comprises an access network, a core network, and a plurality of base station entities (111, 112), and the mobile communication network comprising or being associated with a plurality of public safety answering point functionalities, wherein the at least one mobile communication device is an operative mobile communication device, being used operatively with the mobile communication network, and having an operative device identification identifier and/or an operative subscription identification identifier assigned or related to the at least one mobile communication device, wherein at least one test mobile communication device is simultaneously connected to the mobile communication network, the at least one test mobile communication device, being used - with at least a part of the mobile communication network - for performing the test of the emergency call system, wherein the mobile communication network is a packet switched network and the emergency call system is configured to handle IP multimedia subsystem based packet switched emergency calls and/or session initiation protocol based packet switched emergency calls, wherein the method comprises the following steps: -- in a first step, at least one test originator identification identifier is defined for being used to perform the test of the emergency call system using the at least one test mobile communication device, -- in a second step, subsequent to the first step, a test call is initiated or performed using the at least one test mobile communication device and the at least one test originator identification identifier - the at least one test originator identification identifier having been assigned to or having been associated to the at least one test mobile communication device -, -- in a third step, subsequent to the second step, the test call is detected to be a test call by means of determining whether it involves the use of the at least one test originator identification identifier, wherein - upon detection of the use of the at least one test originator identification identifier - the test call is routed to a test public safety answering point, which is different to that applicable for operative packet switched emergency calls, wherein the detection of the use of the at least one test originator identification identifier is performed by the mobile communication network by means of accessing a database entity or database functionality which comprises a set of test originator identification identifiers. -- in a first step, at least one test originator identification identifier is defined for being used to perform the test of the emergency call system using the at least one test mobile communication device, -- in a second step, subsequent to the first step, a test call is initiated or performed using the at least one test mobile communication device and the at least one test originator identification identifier - the at least one test originator identification identifier having been assigned to or having been associated to the at least one test mobile communication device -, -- in a third step, subsequent to the second step, the test call is detected to be a test call by means of determining whether it involves the use of the at least one test originator identification identifier,