A method and system for exchanging data using a wireless connection according to which a user with one or more portable terminals is located in the transmission and receiving area of at least one network and the terminal or terminals log on automatically to the network in order to establish a connection. A transmission channel for the data exchange is made available for the respective connection that has been established. The transmission channel is automatically adapted for the data exchange to the type of terminal and the type, for example, quantity, of data to be transmitted, by an administrator that is allocated to the network.