A method for handling at least one external device in a mobile communication network environment (U), which comprises a mobile communication network and at least the one external device , wherein the mobile communication network environment (U) comprises as components at least one central handling unit and at least one communication module being part of the mobile communication network and at least the one external device being external to the mobile communication network being assigned to the at least one communication module , said method comprising the following steps: • a dialogue session (D) is established between the at least one central handling unit and the at least one external device of the mobile communication network environment (U), wherein the dialogue session is a session, which is established from one of the components by generating and/or transmitting of a request message and which is terminated by detecting of an event; • in the dialogue session (D) at least one request message is transmitted, said request message containing a request relating to the handling of the at least one external device ; • during the existence of the dialogue session (D) a response message relating to the request message is generated, wherein the response message comprises handling information , which relates to the handling of the external device and wherein the response message is a confirmation message on the receipt of the request message at at least one of the components of the mobile communication network environment (U); • the response message is generated by integrating handling information which was received from the at least one external device ; • the response message is transferred back within the same dialogue session (D); • wherein the request which is included in the request message and the handling information which is included in the response message are transported between the handling unit and the external device in a dialogue chain of at least two concatenated dialogues (D1, D2, D3) during the dialogue session (D), wherein all dialogues (D1, D2, D3) within the dialog chain are established either in mobile originated, MO, or mobile terminated, MT, direction. • a dialogue session (D) is established between the at least one central handling unit and the at least one external device of the mobile communication network environment (U), wherein the dialogue session is a session, which is established from one of the components by generating and/or transmitting of a request message and which is terminated by detecting of an event; • in the dialogue session (D) at least one request message is transmitted, said request message containing a request relating to the handling of the at least one external device ; • during the existence of the dialogue session (D) a response message relating to the request message is generated, wherein the response message comprises handling information , which relates to the handling of the external device and wherein the response message is a confirmation message on the receipt of the request message at at least one of the components of the mobile communication network environment (U); • the response message is generated by integrating handling information which was received from the at least one external device ; • the response message is transferred back within the same dialogue session (D); • wherein the request which is included in the request message and the handling information which is included in the response message are transported between the handling unit and the external device in a dialogue chain of at least two concatenated dialogues (D1, D2, D3) during the dialogue session (D), wherein all dialogues (D1, D2, D3) within the dialog chain are established either in mobile originated, MO, or mobile terminated, MT, direction. <EOS>