| Tone Name | Tone Label | Tone Type | Frequency n (Hz) | Level (dBm) | Time On (ms) | Time Off (ms) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | Min | Nom | Max | Min | Max | Min | Nom | Max | Min | Nom | Max | |||
|   Dial Tone  | 
  Dial  | 
  Dial  | 
  1  | 
  320  | 
  400  | 
  480  | 
  -40  | 
  -9  | 
  Continuous tone  | 
|||||
|   International Dial Tone  | 
  Dial 2, International  | 
  Dial  | 
  1  | 
  480  | 
  600  | 
  720  | 
  -40  | 
  -9  | 
  Continuous tone  | 
|||||
|   Ring Tone  | 
  Ring  | 
  Ring  | 
  1  | 
  340  | 
  425  | 
  510  | 
  -40  | 
  -9  | 
  1240  | 
  1500  | 
  1740  | 
  2520  | 
  3000  | 
  3460  | 
|   Busy Tone  | 
  Busy  | 
  Busy  | 
  1  | 
  340  | 
  435  | 
  510  | 
  -40  | 
  -9  | 
  140  | 
  200  | 
  240  | 
  140  | 
  200  | 
  240  |