| 摘要 |
This invention concerns a circuit diagram for detection of analogue transmission and check signals on one or more transmission lines of a telecommunication system, particularly of a telephone system by means of which transmission line subscribers can be connected to a central switch, wherein the transmission lines are each preferably connected to the inputs of different detectors for detection and processing of transmission and check signals, e.g., for call detection, subscriber supply voltage detection, polarity detection, metering pulse detection, check signal detection among others, preferably through the intermediary of a signal attenuator, and the detectors for detection and processing of switching and check signals are constructed as digital detectors (8, 9, 10, 11, 12) with digital input and outputs, wherein at least one analogue-digital converter (7) for converting analogue into digital switching and check signals is connected between the transmission line(s) (2) and the inputs of the detectors (8, 9, 10, 11, 12), and the analogue-digital converter (7) is integrated with the detectors (8, 9, 10, 11, 12). |
