Abstract: The present invention relates to a method for identifying a telecommunications subscriber. According to the method, a call from a second telecommunications device (MFG2) of a second telecommunications subscriber is first signaled to a first telecommunications device (MFG1) of a first telecommunications subscriber. Device information (GI1), which indicates the type of subscriber data that the first telecommunications device is configured to process, is then sent from a first to a second telecommunications device. Subscriber data (TD2) is subsequently transmitted from the second to the first telecommunication device, in accordance with the information from the first device. It is also conceivable that device information (GI2) can be transmitted from the second to the first telecommunications device, in accordance with which subscriber data (TD 1) can finally be transmitted from the first to the second telecommunications device.