Section |
|
| Chapter 7. Specifications |
|
|
|
|
|
|
|
|
Tone Name | Frequency | Timing (seconds) | |
|
|
|
|
Dial tone | 400 Hz | Continuous | |
|
|
|
|
Ringing | 400 Hz | 1 on/3 off | |
|
|
|
|
Busy | 400 Hz | 0.5 on/0.5 off | |
|
|
|
|
Voice mail ringing | 550/400 Hz at 16 Hz | 2 on/2 off | |
|
|
|
|
Table |
| ||
|
|
| |
Digit |
| Frequency (Hz) | |
|
|
|
|
1 |
|
| 697 + 1209 |
|
|
|
|
2 |
|
| 697 + 1336 |
|
|
|
|
3 |
|
| 697 + 1477 |
|
|
|
|
4 |
|
| 770 + 1209 |
|
|
|
|
5 |
|
| 770 + 1336 |
|
|
|
|
6 |
|
| 770 + 1477 |
|
|
|
|
7 |
|
| 852 + 1209 |
|
|
|
|
8 |
|
| 852 + 1336 |
|
|
|
|
9 |
|
| 852 + 1477 |
|
|
|
|
* |
|
| 941 + 1209 |
|
|
|
|
0 |
|
| 941 + 1336 |
|
|
|
|
# |
|
| 941 + 1477 |
|
|
|
|
DBS Manual - Revised April 2000 |
