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A Dtmf Tone.
| A | A |
| Asterisk | Asterisk |
| B | B |
| C | C |
| D | D |
| Eight | Eight |
| Five | Five |
| Four | Four |
| Nine | Nine |
| One | One |
| Pound | Pound |
| Seven | Seven |
| Six | Six |
| Three | Three |
| Two | Two |
| Zero | Zero |