Wan Coax Link Down. Wan Coax Link up

About 2 weeks ago I had this problem where the Wan Coax Link would drop and come back up instantly every 15 minutes or so, all day, everyday. I verified this by looking at the router system logging.
1. I got a shipped a new rounter on 7/22. That did not fix the problem.
2. I had a tech come out on 7/24. The ONT got replaced and he took the coax from the tv and plugged it into the router (router coax into TV). That did not fix the problem.
3. Sunday(7/25) another tech came buy. I was not home for this, but he messed around where the splitter was by all our coax connections. It did not seem to fix it.
4. About an hour after he left I unplugged the router and connected it directly to the ONT with a Coax. My connection only dropped once in 2 hours. Ok, so I put the router back in its original spot inside the house. Only got one disconnect in about 6-7 hours. Not sure what's up with that.
5. Internet has been working ok. Link would only drop a couple times a day.
6. Now tonight (8/2 10:00PM PST) I get home and start playing a game and using MSN. I notice I get dc'd. Log back in and get dc'd again a few minutes later.  I check the log and the Coax link has been going up and down since 6:21PM PST till Midnight.  It was going down every minute till 7:33PM PST. The disconnects slowed down since 7:33 and it goes down every 10-15 minutes like it normally did before 7/25. Has stopped disconnecting for about an hour from midnight to 1AM, but it has started back up again with continuous disconnects every 5-20 minutes.
What could this problem be?
Thanks
Whittier, California

My problem is not as sever as yours but I get unexplained WAN droppage every week or so. There is no apparent correlation to anything occuring in my home or neighborhood. This is a problem since I host business servers in my basement and require good QoS. I am still investigating whether this is a router issue or a Verizon service issue. If the latter, I am unsure why the router does not automatically reacquire its WAN IP.

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