Does the same thing at the shop, took it home and it failed on a Verizon line. We did learn that there was a reported case of another TW site that was not working, TW changed out the router and it worked. The issue is that a 6x works fine in its place and we over shot the labor on the job. At this point we are assuming there is an issue with this 536 and we are going to send it in for repair.