| 摘要 |
A communication key is used in conjunction with the operating control (A), the control incorporating a display (2) for communication purposes, a reading unit (4), numerical or alphanumerical, and a keyboard (3), for choice of alternative electronic ports (7). The communication key is used in the form of a magnetic card, an EPROM protected card, a bar-code card, radio plates or an optical card. Such cards can be prepaid and incorporated simulated payments or be a payment card such that payment is then against invoice. |
