| 摘要 |
In the case of a device for transmission of telephone signals via a data telecommunications network ( 2 ) the analogue signals of a telephone terminal are converted to digital signals for transmission via the data telecommunications network ( 2 ) and/or, vice versa, digital signals from the data telecommunications network ( 2 ) are converted to analogue signals for transmission via the telephone terminal. In order to monitor the operation of the device, advantageously digital signals arising within the device are analyzed. According to the invention a digital signal is acquired within the device and the characteristics of this, which characterize the amplitude and/or the frequency response of the acquired digital signal, are determined. The determined characteristics are sent out via the data telecommunications network ( 2 ). In this way the function of such conversion devices can also be monitored over a greater distance via the data telecommunications network ( 2 ) and signals arising therein can be analyzed. Advantageously for this purpose the acquired digital signal is filtered by means of a programmable filter ( 16 ) and integrated after absolute value generation or squaring. Various measured quantities, such as for example the effective value of the acquired digital signal, can be evaluated based on the frequency response adjusted with the filter ( 16 ) and on the result of the integration.
|
