Actually the teleworker server is in server-gateway mode at their home site, and directly connected to the outside for the moment. The end user can get the phone to load correctly from their house, its just when they go into their office and try it through the Nomadix that the phone sits saying "Waiting for Ack"
Also, have 8 other Teleworker phones off the same server at other sites that are up and functioning. I'd requested that they put the phone in the DMZ at the site that doesn't work, but haven't heard anything back yet.