5 ms·
That's a neat idea. You could imagine doing this in DTMF. The fridge could even place the call!
by brian-armstrong 10y ago
That's a neat idea. You could imagine doing this in DTMF. The fridge could even place the call!
- ex3ndr 10y agoIn most modern networks like GSM DTMF are send via non-sound channel. Actually that was done because of famous Woz's blue box.