Just reporting the same occurance happend to me at midnight last night - incoming call from 1001 followed by rapid rings. Extremly annoying.

My ATA was in a DMZ, but I just changed that and hopefully that will take care of this.

I do have an Obi that I used in the past for Google Voice. If I were to use this as my Voipo ATA would I loose any of the Voipo features?