I am using ATT Uverse DSL in the USA. My setup is an OBI 110 behind ATT Gateway (2WIRE modem). I use google voice as SP1 and Localphone as SP2. This setup is fine for SP1 but not for SP2(Localphone). Each time when I tried to dial through SP2 (I dialed **21+areacode+phone number), I could hear the rings then went into silence. I though it might be a one way audio issue but don't how to solve it. Please help.
PS. I temporarily switched out Loacalphone with Callcentric just for the test. The device registered with Callcentric with no issue. However, when I dialed Callcentric test number **217771234567, I heard no ring at all but a message of "404?".