Yes, I do, actually. I've been a practicing hardware design engineer for 40 years. I design this stuff.
Except when it isn't. It really is crappy. Hell, RF (DSLish) can be transmitted over, even crappier, power lines.
Really, the last ten feet doesn't matter when the first five thousand isn't ideal. ...and it isn't, by a *long* shot.
I suggest you learn something. Period.
But a bridge tap, that is open at the far end, will look like a short-circu it somewhere back toward its junction with the main line. The length of br idged line that will look like a short-circuit at the bridge tap depends on the electrical characteristics of the bridging wire and the frequencyof th e signals. But if the overall circuit is close to being marginal, the extr a 50 feet of wire bridged onto the main wire may very well be just enough o f an impedance discontinuity to render the DSL ineffective. When we conver ted to DSL, I made sure that the line/wire from the telco point of presence to where the DSL signal was filtered/split off from the main telephone lin e was a straight shot, no splices or any dicontinuities. Once past the DSL filter, the phone line goes to several locations in both star and mesh con figurations.
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