I just got a DSL connection (SBC Yahoo) set up on monday, and on the modem (speedstream 4100) there was a sticker that said "To maximize connection speed, leave this modem on for 10 days after DSL installation is complete." After doing some googling, it appears they need to test my line during this period, but not 24/7. I read somewhere that they test it from 10pm till 2am, but that was just one person's opinion. I also figured it may not be at the same times for every person, so I'm not sure when mine is being tested. The reason I'm curious about this is because I can't just simply leave my modem on the whole time. That was already blown when my power went out for a night. I also want to disonnect it on purpose so I can move it over to my xbox. I guess my questions are: If I disconnect during a test, will my modem begin the test again immediatly after reconnecting? Also, how long does this test take? Finally, how affected will my speed be from the night when the power went out?