I have had lots of problems calling numbers in the 417 area code. It happens about every 3-4 weeks, where I have to open a ticket and they do some custom call route. It only lasts a few weeks, then when we call it either has dead air, some strange ring and a subsequent disconnect, or some low quality connection. I have family members experiencing the same problem. Unfortunately last time it happened on a Friday and wasn't fixed until Monday. Needless to say my wife not being able to call her mom for 3 days did not go over well.