The DTMF tone detector scans your currently active file for DTMF tone pairs and shows if and which DTMF signals were detected in the file. Vox Studio detects all 16 DTMF signals; the detected digits include 1234567890, ABCD, * and #.
It is very important to set the detection threshold at a realistic value using the Tools/Defaults/DTMF menu. To give you some indication, a "must detect" level of -24dB and a "may not detect anymore" level of -32 dB are realistic values in telephony. Typically one is not allowed to place DTMF tones with very high amplitudes on a telephone line (above -9 dB for instance) so it is useles to try and detect DTMF tones above that value or below the minimum threshold value.
More productivity features based on this DTMF detection capability will be added in future versions of Vox Studio.