Manual

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%