I’ve summed audio output of SIM800C and FSK caller-id generator output to give line circuit of FCT.
When incoming call is received SIM800C gives music until call answered (ATA command) and this cause caller-id signal not to be detected by telephone. If I disconnect music by hardware, caller-id message is well received.
Could someone help how to prevent SIM800C playing music while incoming ring.
If not too much, I’ve another issue: Which AT commands adjust inbound and outbound voice levels during conversation?
Thank you in anticipation.
I have used the AT+CMIC=0,15 command for MIC volume setting to maximum level and CLVL command for speaker volume setting.
Not sure about the FSK FCT part. Didnt understand the question clearly. Please elaborate.
I can adjust inbound/outbound voice levels with AT+CMIC & AT+CLVL commands, thanks.
I solved ringing tone problem with “AT+CALM=1” command.
To elaborate my problem; I have an analogue summing circuit which combines audio output of SIM800C and FSK caller-id generator DAC. Since I didn’t put switching component, ringing tone generated by SIM800C was being added to FSK signal. Now it is solved.