I recently upgraded my owner's TP (twisted pair) for her phone and I have to tell you that it works. As for the material, I gave it 3 stars because it's twisted pair and not a solid cable, which if you're connecting to an external telecom box you'll want to use a solid cable. However, in my case, with all the twists and turns, the core turned out to be twisting. Will it improve DSL speed? It depends on both the distance to the telecom company building and your plan. What I'm saying is that inโฆ