3 ms·
It depends on the quality of the codec used by the VM system. Any compression is likely to destroy the code. VoIP protocols usually send DTMF as specific messag
by jpollock 12y ago
It depends on the quality of the codec used by the VM system. Any compression is likely to destroy the code. VoIP protocols usually send DTMF as specific messages for this reason. However I wouldn't be surprised if it worked.
- hetman 12y agoSending tones in band actually works reasonably well on mobile networks. It's not 100% reliable which is why alternate signaling is used, especially when the signal quality is low.