I have the same problem, except that it was working and a phone call was made at 5:00PM. The next morning, you could answer incoming calls, but not make an outgoing call.NOTE: in our area, one of the exchanges is 228. dialing the 22 has not affect on breaking dial tone, however, the 8 does. Still cannot complete a call, but dial tone breaks. How do I reset or re-initalize the whole system?