Hi, I am a home pc user connected via ethernet cable to the internet via an NBC-VAC modem provided by my ISP. My modem is connected to the house ringmain with D-Link PowerLine AV 500 Passthrough Adapter as is my PC. These have worked well and continue to do so. My contract also includes unlimited fixed line telephone calls. Recently I have been experiencing a significant drop in my internet speed and sometimes total loss of telephone connection. At times the problem seems to correct itself for a short while, but soon reccurs. Surfing the net is extremely slow and sometimes it takes 30-40 seconds to obtain a dial tone when I need to use the phone. Also during calls the recipient often loses my speech or the call simply drops altogether. I have rebooted the modem many times, removed all wires and plugs etc but all to no avail. My ISP seems to find nothing wrong at its end and I am wondering is the fault is in the modem itself or the telephone line into the house. Repairs to the line leading into the house will fall to the ISP and I accept that any internal fault would be my responsibility. Before proceeding further, does anyone experienced a similar problem a d can offer some advice.