> Are you first resetting the AirPort Extreme back to factory default settings.....before.....you reconfigure the device?
Yes, I did that.
> Have you double checked to insure that the Ethernet cable connects from one of the LAN <--> ports on the Zoom modem/router to the WAN "O" port on the AirPort Extreme?
Yes.
>If yes, have you tried another Ethernet cable?
Yes
> If you need more help, it would really help us to know what model number of AirPort Extreme you have......and.....whether you are using Airport Utility on a Mac, a PC, or an iOS device. If it is a Mac, we will assume that you are running a current or recent operating system on the Mac, correct?
Unfortunately, we've had this a long time, and I can't find it. I'm trying to configure via Macbook pro. Thanks.