Re: Power Levels
JB's right. You must be living right close to the street box. A forward path attenuator would bring down the downstream levels but would not increase the upstream poer. Actually the upstream power doesn't need to be high because you're so close to the cabinet but any noise getting in could sort of "overcome" that low power level. So moving in the cabinet to a tap point with c. + 12 dB (greater) attenuation would do the trick.
My advice is at your risk.