is it possible to run a 2-wire AC power cable (2x2.5mm2 or thicker) from the telephone junction box to the inside of the house instead of using an ordinary thin phone cable? will that affect the voice quality or maybe an ADSL setup? the distance is approximately 50 meters.thanks a lot.
telephone wire is twisted pair.. which reduces interference, and induction problems... using electrical cable in place of phone cable would work but not without acting like an antenna and picking up all kinds of back ground interference... as well as potentially degrading the signal for your DSL...
Your phone wire in your house may be 'twisted pair' but the majority of a phone line and drop to your house is just a pair of copper wires, side by side. The resistance should not be a problem for you, so give it a try.
Two conductors are two conductors, unless there are high-frequency issues. In this case it appears that if you are replacing parallel (not twisted) wires with another set of at least equal thickness, you should be okay. Since ADSL is used on parallel wires, without twisting them, the frequencies conducted should not present problems.