| 摘要 |
PROBLEM TO BE SOLVED: To allow a system comprising a control server and a control device connected with the control server via a global network to cope with a situation in which the control device cannot properly communicate with the control server.SOLUTION: A POS terminal 10 comprises: a server function unit 502 having a server function; and a client function unit 501 that, if it can properly communicate with a control server 15, communicates with the control server 15 as a client of the control server 15, performs processing with the control server 15, and if it cannot properly communicate with the control server 15, it communicates with the server function unit 502 as a client of the server function unit 502, and performs processing with the server function unit 502.SELECTED DRAWING: Figure 2 |
