| 摘要 |
A method and an apparatus for enabling a vendor of a computer system, such as a telephone exchange, to see what features in a computer system have been used by the customer, and which ones have not. The computer system normally comprises one or more optional features, which may be activated forever, or for a limited period of time. Information concerning the activation status, when the activation status was changed, and the use of each feature, is logged in a persistently stored log (11). The use of each feature is also registered in a log indicator (9). By checking the log (11) and the log indicator (9), the system vendor can determine what features have been used and, in one embodiment, how often each feature has been used.
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