There is disclosed and claimed a system for and a method of performing interactive data exchange, for example as part of a financial transaction, between a user base and a remote network. The system includes a request data input device 20. A telephone network 22 is connected to the device for transmitting the request data to the network 28. At the user base there is also provided a receiver for receiving response signals from the network and which signals include encoded response data. A signal decoder 14 is provided at the user base to decode the response data. A display 12 displays the response data interactively with the request data.