Transmission of call-related data in a CTI communication system

In particular, the invention relates to a method for transmitting data in a CTI communication system in FIGrdparty-configuration, comprising a communication system (1) with a plurality of terminals (2a-2c), which generates a call (5) for a communication connection between two or more terminals (2a-2c), which contains predetermined information about the connection TSP (4) and a plurality of clients (3a-3c) connected to the TSP (4) communicating with the TSP (4) via a CTI interface (7). For the transmission of files or logging data (10) between the clients (3a-3c), it is proposed to transmit the data to be transmitted from one of the clients (3a-3c) to the TSP (4) via the CTI interface (7) and to write in a predetermined memory area of ​​the call (5). These data can also be read out from the other clients (3a-3c) assigned to the call (5) via the CTI interface (7).