Ooma and C7000-100NAS problems

About two weeks ago, my WiFi went out.  My copper connection also slowed to a crawl.  After some checking, I found that if my Ooma Telo was disconnected from my router, the WiFi and Internet came back.  I got a replacement, but it had similar issues.  I got another Telo and still have the same issue.  One thing all three devices has in common, I believe, is the same firmware.  The initial Telo worked with the new Nighthawk router for six weeks before problems occur.  The two replacements had to have firmware updated before they would connect. 

 

But I could be wrong.  Is there some setting in the C7000-100NAS that would conflict with the Telo?  Please let me know.

 

BTW: The Telo allows me to make VOIP calls.  While nice, if I had to choose between Internet or VOIP, I choose Internet.