Method for checking and modifying user facilities assigned to the subscriber stations in a centrally-controlled telephone PABX system

The invention relates to a method for checking and modifying user facilities in a centrally-controlled telephone PABX system which has a keyboard-controllable operating console, segment displays, a customer data memory and subscriber-individual visual display means. The intended object is to check and modify the user facilities from a central station without interfering with current operation. To achieve this, a code digit (e.g. 24) of a user facility can be entered according to the Figure with the keyboard (TT) in such a way that this code digit can be read off on segment displays (SE), every subscriber station (01 to 12) in the customer data memory which is provided with this user facility being displayed (display device OAE), all display devices (OAE) are cleared by means of a special signal (square) with the aid of the keyboard (TT), the display device (OAE, 1 to 12) assigned to the subscriber station (01 to 12) is activated after any given subscriber number (01 to 12) has been dialled and the special signal transmitted, and the user facility corresponding to the code digit on the segment elements (SE) for the corresponding subscriber station is stored in a buffer memory and, after the special signal has been transmitted once more, this user facility is transferred from the buffer memory to the customer data memory. This creates the advantage that the individual user facilities are visually displayed and can be modified as required without interfering with operation. The invention can be used in centrally controlled telephone systems.