My internet connections are confusing and complicated so I will spare you those details. One connection is via ADSL2 to telnetcommunications.com. It started to get flaky. I measured 50-90% packet loss over various periods of time. I also have a VDSL2 connection with telnetcommunications.com that did not have the problem. Tentative conclusion: telnetcommunications.com's network is not the problem. I use a TP-Link TD-8816 as a modem, but not as a router. I have a Linux box that does the PPPoE thing. I tried: powercycling things, one at a time, to see if things got better. They didn't. I tried: phoning support. They suggested switching phone cable or ethernet cable before trying to talk to Bell. I tried: switching cables. No change. I tried: taking other phones off phone line and removing splitter where the ADSL modem was connected to the wall jack. No change. I tried: swapping ADSL modem for an identical one, purchased at the same time. It worked! Lesson's learned: - being a hoarder has its advantages (why did I buy two ADSL modems 3.5 years ago?) - being a hoarder has its disadvantages. Both modems are out of (2 year) warranty. The splitter that came with the newly unwrapped modem doesn't work and I have no recourse. - ADSL modems sometimes fail. My previous ADSL modem (Speedstream something or other) failed, but I don't remember the symptoms. - ADSL modems don't always fail hard. - with so many pluggable parts, there is a very large number of configurations to test. The modem has: power, phone, ethernet, all of which could have been swapped. The wall jack needs a splitter, an ADSL filter on one side, and cables connecting all of these. Of the right length. And other jacks in the house need to be played with too. I didn't even bother to see if the replacement modem would work as well with the original modem's power supply, or vice versa. Life's too short.