Subscriber card reader telephone equipment having transaction functions

摘要

The system (3) is connected to a transaction server (2) via a telecommunications network (1). The card reader is microprocessor controlled (13). Part of the microprocessor (19) cannot be accessed if a transaction is in progress. Information can be entered via a keyboard (15) and there is a keyboard interface (15A) which ensures confidentiality is maintained. When the card (20) is inserted, information is stored in a logic memory then transferred to the remote transaction unit.