The modem reads like it's okay. Your problem is the wireless router. Either the signal is weaker than the previous, the channel of its 2.4 band is overcrowded or it just processes too slowly. PoS.
Does the app connect directly to the router or does it go through the router...out the modem...to Cox...back to your modem and then to the router? I suppose a good test would be to disconnect the Pano from the coax and try to admin the router with the app. Your LAN wouldn't shutdown if you disconnect the coax...(Internet service would shutdown)...so the local app-to-Pano connection should still work.
