Had this trouble 7 months ago and gave up on Comcast. Their techs could not fix after 5 in home visits and about 100 online troubleshoot sessions over a 3 month period. I missed having fast internet so thought I'd give it another try. Received new Arris modem and hooked up yesterday. Since then modem loses connection every 30 min. to an hour and does not reconnect until I manually reboot it. Looks like nothing has changed and I'll have to cancel subscription again. On install, the tech. noted that the cable was a very long run and said it might cause trouble. No one had ever mentioned this before. So, today, I moved the modem to the other side of my house right next to where the cable comes in and hooked it there with a 3 way splitter, 2 to tvs and the 3rd, a 3 foot cable to the modem. I disconnected the long run cable from the source completely in case it might still weaken a signal even if nothing is connected at the other end. Still no luck... modem connected, stayed on about 30 min., then right back to dropped connections. Don't know what else to do but stick with my AT&T DSL which has been always on and never drops. Thought I should revisit this post as it is a year later now with no troubles at all!!! After trying the above, several days later, I decided to go all out and totally separate the tv and internet cables as they had been with the initial long cable. I hooked all my tv's to one cable using an indoor splitter. The second cable was hooked directly to my cable modem and had nothing between it and the outside pole except for one straight passthrough connector that anchors the cable to the siding. This made the shortest and most direct connection possible from the pole to my modem with no splitters at all. I was unable to make the modem connect after all the rearranging of cables so had to have a tech out one more time. It's now nearly one year later with nearly perfect up time!! I couldn't be happier except for wishing for lower costs. I believe I've only lost connection possibly 2 or 3 times, not counting power outages, during the last year and the modem reconnected by it'self after a short time.
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