| 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  | 
  250  | 
  440  | 
  485  | 
  -40  | 
  0  | 
  Continuous tone  | 
|||||
|   Ring Tone  | 
  Ring  | 
  Ring  | 
  1  | 
  385  | 
  440  | 
  485  | 
  -40  | 
  0  | 
  1340  | 
  1500  | 
  1660  | 
  3340  | 
  3500  | 
  3660  | 
|   Busy  | 
  Busy  | 
  Busy  | 
  1  | 
  385  | 
  440  | 
  485  | 
  -40  | 
  0  | 
  400  | 
  500  | 
  600  | 
  400  | 
  500  | 
  600  | 
|   International Dial Tone  | 
  Dial  | 
  Dial  | 
  1  | 
  275  | 
  330  | 
  385  | 
  -40  | 
  0  | 
  Continuous tone  | 
|||||
|   2  | 
  385  | 
  440  | 
  485  | 
  -40  | 
  0  | 
|||||||||
|   Routing Tone  | 
  Routing  | 
  Other  | 
  1  | 
  406  | 
  440  | 
  474  | 
  -40  | 
  0  | 
  40  | 
  50  | 
  60  | 
  40  | 
  50  | 
  60  |