Dtmf decoding – Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) User Manual
Page 598
Audio Commands
DTMF Decoding Mode +WDDM
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WM_DEV_OAT_UGD_049 - 001
VOLUME 4
August 23, 2007
• DTMF decoding feature capabilities:
DTMF Decoding
with Post-Processing mode (35dB<S/N<45dB range)
DTMF duration: 100ms
Blank between DTMF: 65ms
Post-Processing Blank Size: 40ms
Tolerance: +/- 30ms
Results may vary between -3% to +3%
DTMF
GSM codecs
Signal Low
freq.
High
freq.
FR
HR
EFR
AMR
FR
12.2
Kb/s
AMR
FR
4.75
Kb/s
AMR
HR
7.95
Kb/s
AMR
HR
4.75
Kb/s
1
697 Hz
1209 Hz
100% 98% N/A 100% 100% 100% 100%
4
770 Hz
1209 Hz
100% 68% N/A 100% 99% 100% 99%
7
852 Hz
1209 Hz
100% 91% N/A 100% 99% 100% 100%
*
941 Hz
1209 Hz
100% 74% N/A 100% 100% 100% 100%
2
697 Hz
1336 Hz
100% 98% N/A 100% 100% 100% 100%
5
770 Hz
1336 Hz
100% 100% N/A 100% 98% 100% 96%
8
852 Hz
1336 Hz
100% 98% N/A 100% 100% 100% 99%
0
941 Hz
1336 Hz
100% 100% N/A 100% 100% 100% 100%
3
697 Hz
1477 Hz
100% 98% N/A 100% 99% 100% 99%
6
770 Hz
1477 Hz
100% 91% N/A 100% 100% 99% 100%
9
852 Hz
1477 Hz
100% 88% N/A 100% 100% 100% 100%
#
941 Hz
1477 Hz
100% 95% N/A 100% 100% 100% 100%
A
697 Hz
1633 Hz
100% 100% N/A 100% 100% 100% 100%
B
770 Hz
1633 Hz
100% 91% N/A 100% 85% 100% 84%
C
852 Hz
1633 Hz
100% 92% N/A 100% 94% 100% 96%
D
941 Hz
1633 Hz
100% 100% N/A 100% 100% 100% 100%