Portable terminal device

Claim 1

A portable terminal device adapted to be carried to a customer site and to perform transaction operations by transmitting and receiving data to and from a central unit through a telephone set, said portable terminal device comprising: a card reader for receiving a transaction card on which customer data is recorded, a first control card on which transaction limiting data is recorded for limiting the scope of transactions permitted by said terminal device, said transaction limiting data including at least one limiting item data indicative of a limit of total transaction amount to be permitted, and a second control card on which data is recorded for causing the inhibiting of transactions by said terminal device, said card reader functioning for reading out the data recorded on each of said transaction, first control card and second control cards; a keyboard for inputting transaction data; data buffer means coupled to said keyboard and said card reader for temporarily storing the transaction data inputted from said keyboard and the customer data read out from said transaction card by said card reader; memory means coupled to said card reader for storing said transaction limiting data read out from said first control card by said card reader; state storing means coupled to said card reader for holding a transaction ready state in which said terminal device is ready for a transaction when said transaction limiting data is stored in said memory means and a transaction inhibit state in which said terminal device is inhibited for a transaction when said card reader reads out said second control card; transmitting means coupled to said data buffer means for transmitting the data stored in said data buffer means to said central unit through said telephone set during a time in which said state storing means holds the transaction ready state; accumulating means coupled to said data buffer means operative prior to the data transmission by said transmitting means to said central unit for producing an accumulation of transactions for each limiting item of said transaction limiting data; and means coupled to said accumulation means and said memory means for checking whether or not a value of the accumulation produced by said accumulating means exceeds a value for the corresponding limiting item of said transaction limiting data stored in said memory means, said means for checking causing the inhibition of the data transmission by said transmitting means to said central unit when the value of the accumulation exceeds the value for the corresponding item of said transaction limiting data, whereby transactions with a plurality of customers are possible within a scope allowed by a manager of said terminal device.