Section 300-Installation
Chapter 7. Specifications
DBS-2.3/9.2-300
DBS Manual - Revised April 2000
7-17
Table 7-18. DTMF frequencies
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
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
Tone Name
Frequency
Timing (seconds)
Содержание DBS 40
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