Okay -- I have reluctantly moved the ATA outside of the router.

Current configuration:

Cable Modem <--> ATA <--> Router <--> Lan Devices

Still not working, as expected as I think there is something else going on with either the verision of old code that is on my ATA or a configuration issue on there end. Everthing was working until this weekend and I have not made any changes -- until I now moved the ATA to in front of the router.

I have a ticket open and hope to get this resolved soon. Good news is that the failover feature is working as my cell phone rings when someone calls my Voipo number.

-bird