I keep being told it is my firewall settings that is causing the problems I am experiencing. So, I opened up my router/modem, went to the firewall settings and printed a screen shot of the information of how my router is set up and sent it to the Voipo techs. They said that my settings are correct. By process of elimination, that only leaves the problem on Voipo’s side, and they, the techs, suggested the same thing. They keep tweaking the adapter on their end, I hope they get it figured out at some point. Sometimes I can hear the dialed numbers ring, and sometimes I can’t, it seems to come and go. Maybe an exorcism is in order, to get rid of any lingering poltergeists in their system.