Abstract: A method for measuring by means of a mobile auxiliary device, quality determining parameters of a communications transmission link which is firmly connected to at least one end thereof and includes a central measuring system. Precise determination of the quality determining parameters in one partial link (7) of the communications transmission link, the invention provides for the auxiliary device (12) to transmit a control signal to the measuring system (25). After receipt of the control signal in the measuring system (25), the communications transmission link is subdivided into two partial links (7, 8). Subsequently, it is verified in the measuring system (25) which of the partial links the auxiliary device (12) is connected to, after which the quality determining parameters of the verified partial link (7) of the communications transmission link are measured.

Abstract: The invention relates to a switching arrangement for connecting and/or separating two sections (7, 8) of an electrical line (3), said arrangement comprising a switching device (10) having contact elements (11, 12) which are connected to said two line sections (7, 8) as well as a plug device (15) having an actuation element (20) and plug contacts (18, 19).For providing a switching arrangement of particularly simple design for connecting and/or separating two sections of an electrical line, the present invention proposes that the contact elements (11, 12) be electrically connected to the actuation reeds of a reed contact (25) and the actuation element (20) be means magnetically influencing said reed contact which will open said reed contact (25) when the plug devide (15) is plugged in.