I been on hold all day attempting to explain this issue of incomported. My mother calls me and gets a disconnected notice, but I call my number from my cell or work or a neighbors home and it rings through fine. My mother is with (A LARGE CABLE AND VOICE PROVIDER WHO RAISES RATES AT RANDOM), I was till I switched phone companies, for a better deal. Thank goodness I can put this word on the web so when it happens to anyone else, it is easier to explain.