Verfahren zur Uebertragung des Belegungszustandes in einem Kommunikationssystem, insbesondere in einer tastengesteuerten Wechsel- oder Gegen-Lautsprechanlage mit Linienwahl sowie Einrichtung zur Durchfuehrung des Verfahrens

Process for the transmission of busy/idle statuses in a communication system, in particular in a key-operated one-way or intercom loudspeaker system equipped with line selection. Controlled by a switching processor (1), data is loaded onto a data line (6) via the associated busy/idle status of all terminal devices as data packets at a first clock pulse, where each data packet contains a serial bit stream in which each bit represents the busy/idle status of precisely one terminal device and the bits are arranged in the data packet in a predefined constant sequence by a second clock pulse is much higher than that of the first clock pulse. The frequency of the second clock pulse and the number of clock pulses assigned to a data packet is equal to the number of terminal devices. The clock pulses are loaded onto a clock line (7). In order to report the busy/idle status to a terminal device (5.1-5.n), the data is synchronized with a selected part of the clock pulses in order to select the bi ts in the data packet assigned to said terminal device. These bits are used to generate control signals which are routed parallel to the display units of the terminal devices.