Does anyone have a digital system that is as involving as their analogue front end?

@audphile1 

Thank you for the information. I have turned off the second subsidiary mesh that the streamer was plugged into, so there is only one mesh plugged into the fiber hub. I now have the Meitner streamer plugged directly into the fiber hub which has four ethernet plugs. After plugging the Meitner directly into the ethernet hub, it did not connect to the iPad, which is what I use for Jplay. I turned off the Meitner and unplugged it for several minutes and also unplugged the fiber hub for several minutes. I rebooted the fiber hub. Then plugged in the Meitner and rebooted it. Still no connection. I do not think I have enough information about the Meitner and how to get into its network info to do what you're suggesting. I sent in a request for support to TMR. They should know all of this network stuff and be able to help. Or perhaps they can connect me to Meitner. I've spent the last several hours trying to do it myself and I'm burned out. But I have your information to tell to TMR support if they need it. Thank you. 

Give EMM Labs a call if TMR is unable to help

Can you try mconnect app? It’s free. See if that recognizes the Meitner 

One other thing to try is to go into the at&t router or mesh setup and see if upnp is enabled. If it’s not, enable it. This can potentially fix your problem. 
I googled this and at&t routers moght not support upnp. If that’s really the case then you need to use a 3rd party router like netgear os something similar and plug thd Meitner into it. 
It’s unlikely the Meitner that’s a fault. 

What happened to the other mesh network you were using before when it all worked? Can you switch back to that?

I'll try switching back, but it didn't work on the other mesh either. As I said, I had the same problem with my Moon 280D after a black out. Moon had to help me get it going again. Thanks. I hate network problems.