Reversal function testing method for inverting polarity of subscriber connecting line, involves activating inverting function, connecting subscriber connecting line to inverting device, and checking correct function of inversion

摘要

The method involves providing an inverting device (RG) and separating a subscriber line module (SLM) from the inverting device. A physical inversion is enforced on wires (a, b) of a subscriber connecting line (TAL). An inverting function of the inverting device is activated and the subscriber connecting line is connected to the inverting device, where correct function of inversion is checked by measuring current flow direction. An independent claim is also included for a device for testing a reversal function for inverting polarity of a subscriber connecting line.