3G UMTS User Manual
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DTMF
You can do some DTMF Detection Settings if you choose “GSM -> DTMF”.
Figure 3-3-1 DTMF Detection Settings
Notice
: If you don’t have special need, you don’t have to modify these settings. You can just choose
“Default”.
DTMF Normal Twist and Reverse Twist is the difference in power between the row and column
energies. Normal Twist is where the Column energy is greater than the Row energy. Reverse
Twist is where the Row energy is greater.
DTMF Relative Peak Row: The value is the smaller and the detection is easier. If you lost some
numbers, you can try to put the value down. The adjustment range is 0.02 at a time.
DTMF Relative Peak Col: The value is smaller and the detection is easier. If you lost some
numbers, you can try to put the value down. The adjustment range is 0.1 at a time.
DTMF Hits Begin: Sampling matching value. You can choose 2 or 3.
DTMF Misses End: The time interval between the two digits you input. Adjust the speed of
input. The smaller value represents the shorter intervals.