General Dynamics R2600 Series User Manual

Appendix B
TONE AND CODE SPECIFICATIONS
Table B-1. Standard DTMF Tones
Tone Group Standard Dtmf (Hz)
LOW
LOW
LOW
LOW
HIGH
HIGH
HIGH
HIGH
697
770
852
941
1209
1336
1477
1633
Table B-2. DTMF Frequency Coding*
Low Group Tone
(Hz)
High Group Tone
(Hz)
Key
697 770 852 941 1209 1336 1447 1633
1
2
3
A
4
5
6
B
7
8
9
C
*
O
#
D
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B-1

General Dynamics R2600 Series Specifications

General

Brand	General Dynamics
Model	R2600 Series
Category	Measuring Instruments
Language	English