Uverse signal has been lost

Is this happening on a wired or wireless receiver?  If wireless how many signal strength bars show on the front of the receiver?  3 is marginal, 4-5 best.  Might have to move the WAP (little box ethernet connected to the gateway) to get a better signal.  Use longer ether net cable if necessary to give yo more freedom to move WAP to a closer location.

Thank you for the replies. I sincerely appreciate it. The past 2.5 hours have been completely trouble free. (That's not to say it will remain this way.) I absolutely dread having to call when there is any problems because I know it means at least 2 hours on the phone.

If the problem occurs again, I will check what you have suggested. Thanks again.

I am getting the same message repeatedly for the past 24 hours. I can change the channel and it comes right back, the boxes are right next to the DVR and the wireless router (where the technician placed them) but it does not stop. I have tried restarting and rebooting the system but it still keeps happening. Any solution for this?

If the boxes are "right next to the wireless router", I'd suggest using Ethernet cables to connect them.

Alas, we ended up having to switch providers which I really hated to do since I much prefer the programming on AT&T, but we also need the internet & a landline phone to have a reasonably reliable connection.

So our Box is ethernet wired. It doesn't matter what channel I change to, it continues to lose signal on every channel. I've tried the my ATT app and it is running into problems as well, and telling me it's unavailable at this time.  I have tried rebooting the receiver by the reset button on the back, also through the troubleshoot and resolve on the television itself, also through the app when it's working, and nothing changes. We have also reset the Motorola box and it still is running into trouble. It is happening on every TV in the house.

Check to see what the Gateway says about the condition of the line between the AT&T Network equipment and your Gateway.  Visit http://192.168.1.254/ click on the Broadband tab and look for the table with Sync Rates, Attenuation, SNR and error counts.  Take a screen capture of that table and post in a reply so we can advise.

Is a 3rd party router or switch in use?