| 摘要 |
An apparatus for receiving and accepting tokens, such as coins or notes, the apparatus performing a calibration to a new type of token at its position of normal use. During the calibration, tokens of the new type are used for narrowing criteria used for accepting or rejecting tokens of the new type. The initial criteria are downloaded from a remote computer, and the calibration is performed on tokens inserted by users during normal operation. The user is not able to see that the apparatus is performing a calibration, as the apparatus performs the service upon acceptance of a token of the new type. Also, in order to prevent or reduce fraud, the apparatus may be instructed to not use all accepted tokens of the new type for the calibration. In order to further check that the calibration is correct, the apparatus may comprise means for holding at least those tokens of the new type having been used in the calibration.
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