2021-01-31 Redid connector on phone cable for VDSL 3 weeks ago
While I was working in the crawlspace yesterday I rerouted the phone cable that brings the VDSL from the network connection point (in the crawlspace, not a good place!) to the utility closet. After that the VDSL started giving disconnects. Today I reopened the crawlspace, shortened the phone cable by about 8 centimeters and crimped a new connector on the phone cable. The copper on the original connector looked completely black, which may have given interesting interference at higher frequencies. As we say in amateur radio: RF is magic. And since VDSL is RF, having oxidation in the wrong place can cause intermodulation.