For those who wonder what phase assignment have the plugs, I can say ... no plan. I need to move a cable to a QSC modem to another room. Everything went super. I had read that these lines need other contacts than those for a telephone / Splitter / "normal" DSL modem. However, the lines appear to be connected to suffice. The only disadvantage. The cable could be a little flatter. Whether there is something at all I do not know. But I put the cable between a Türschanier (I know this is bullshit but went halt otherwise). The cable now holds more than a year. Problems with the connection does not exist also. Modem runs as the normal 1 1/2 meters of cable.