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Method and device for checking the function for inverting the polarity on a subscriber line comprising a plurality of wires
Method and device for checking the function for inverting the polarity on a subscriber line comprising a plurality of wires
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机译：检查包括多条导线的用户线上的极性反转功能的方法和装置
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摘要
The invention relates to a method and to a device for testing the function for inverting the polarity on a subscriber connection line (TAL) comprising several wires (a, b), in order to connect at least one subscriber to a subscriber connection line (SLM), which comprises at least one inverting device (RG) and a current measuring device (MG) which is associated with the inverting device (RG). In a first step, the subscriber connection component (SLM) is separated from the inverting device (RG) and forces physical inversion on the wires (a, b) of the subscriber connection line (TAL). In a second step, the inverting function of the inverting device (RG) is activated. In a subsequent third step, the subscriber connection component (SLM) is separated from the device (DC) which forces the physical inversion and is connected to the inverting device (RG). The correct function of inversion is tested during all three steps by measuring the direction of the current flow.
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