| 摘要 |
In a data transmission system, the QOS (quality of service) is continuously monitored (15) by measuring certain system parameters. If too low a QOS is found (16), individual or a number of further tests (19, 20, 21) are automatically and immediately started in order to determine the information about the system state which is required for locating the cause of the low QOS. Apart from the measurement of particular system parameters, these tests also comprise the collecting of certain quantities already present in the system. A test can also start other additional tests (22, 23), the individual tests being configured in dependence on the system parameters already known, in such a manner that they provide meaningful results for the current conditions.
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