http://www.thinkbroadband.com/news/3...rein-fall.html
"REIN stands for, Random Electrical Impulse Noise, and it is very often the
reason for those seemingly random disconnects on your ADSL connection."
"The moral is that if your ADSL starts to run slow and your Christmas lights
are on, try switching them off and restart the ADSL modem to see if things
improve. If they do, consider moving the Christmas lights. Things to avoid
are running Christmas lights close to the telephone wiring, or plugging
power transformers into the same power strip as an ADSL modem. It may
actually be your neighbours lights that are the problem, so some delicate
discussions could be required. If they have ADSL themselves, they may
welcome some help in figuring out what the problem is."