The setup of ibi may be delayed or result in periodic "device offline" status when connected to AT&T U Verse routers. U Verse routers support DFS on the 5GHZ band. The time to scan for DFS channels can be 10 minutes or more.
If you are unable to connect using DFS, connect ibi to the 2.4 GHz band or another network router that does not switch to DFS channels.