Thanks, I'll look into this, I think I'll call Denon as well to see if they recommend anything.

BTW MAC address filtering is present but not enabled on the ATT router/modem.

Have been unable to bring up the 3808 in the device list of either router for the past day, so am unable to perform further testing of any kind at this time with regard to the avr.

"If you try to turn toward it, you go against it."