Comments

Author Comment Last activity Moderation
rmeister "@warren, regarding the cable type: there are two different standards. The main difference is that ground and microphone signal pins are switched. B..." | Read more » about 4 years ago
rmeister "Last week I tried to replicate the circuit of the SoftModem shield. I had not the exact resistor values at hand, so maybe thats why it could not re..." | Read more » about 4 years ago
rmeister "Ah, I overlooked that it was softserial in your case. Yes I think modem.js produces sine waves. At least there is a sine function in the code and ..." | Read more » about 4 years ago
rmeister "Hi @warren, thanks for all the hints and links. I did some testing as well. Here is a capture from the output signal of softmodem. softmodem_test..." | Read more » about 4 years ago
rmeister "Hi Jeffrey, the Bell modem standard is basically FSK with the frequencies 1200 and 2200 Hz. SoftModem uses different frequencies for FSK, but that ..." | Read more » about 4 years ago