Hi I have a problem. I installed a new phone externally at a house today a yealink T22. Everything went ok and I dial into the office no problem. I spoke and I picked up voice mail. Now when I got back to the office I tried dialing and it does'nt seem to do anything but it does ring at that end but I cant here them and they cant here me. . I have open ports 9000-9049 and 5060 on the house router then I also tried DMZ as well but I still cant dial from the office to this phone any Idears?