Device for exchanging information between a cash register and a payment-processing device

The invention relates to a system for MEDIA PROCESSING OF PAYMENT AND A SIGNAL PROCESSING DEVICE COMPRISING A FIRST PORT OF DATA COMMUNICATION WITH A CASH REGISTER (10). DEVICE SIGNAL PROCESSING (50) also comprises a second data port for communication with a DISPLAY, A THIRD data port for communication with a processing device PAYMENTS AND INTERMEDIATE UNIT MEMORY FOR DATA STORAGE. THE DEVICE IS DESIGNED TO, TO GET A FIRST AMOUNT OF DATA IN THE FIRST PORT OF DATA SEND THIS FIRST DATA TO A NUMBER OF DETECTION DEVICE TO CHECK THIS FIRST AMOUNT OF DATA; The detection device IS READY TO TRANSPORT THE FIRST NUMBER OF DATA AHEAD TO THE UNIT BUFFER, UNIT BUFFER IS WILLING TO STORE TEMPORARILY DATA RECEIVED AND THEN SEND THE SECOND PORT OF DATA UNIT DEDETECCION THIS READY TO GENERATE A SIGNAL dETECTION IN A FINAL CODE FUNCTION DETECTED AND SEND THIS TO THIRD detection signal DATA PORT; A computing unit is ready to AWAITING A SIGN OF PAYMENT MADE FROM THIRD PORT OF DATA AND CALCULATING UNIT READY TO GENERATE AN AMOUNT OF INFORMATION (380) DEPENDING ON THE RECEIVING SIGNAL payment made; THE SIGNAL PROCESSING DEVICE IS READY TO GENERATE A SECOND AMOUNT OF DATA IN TERMS OF FIRST AMOUNT OF DATA AND THE AMOUNT OF REPORTS GENERATED (380) SECOND AND SEND THIS AMOUNT OF DATA TO SECOND data port.