| 摘要 |
In order to prevent the filling level of the buffer of an ATM receiver becoming too low or too high, the buffer is read under the control of a first or a second clock oscillator via a changeover switch. The clock oscillators generate clock signals of different frequency. The changeover switch is controlled by a filling level signal. Below a certain filling level, the changeover switch connects the read gate of the buffer to the clock oscillator which has the lowest clock frequency, and above this to the clock oscillator which has the highest clock frequency. The two oscillators can be used jointly by all the ATM receivers within a "curb". <IMAGE>
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