Hi This bug is really crazy, please help me In the follow scenary ATA-186 -> SIP -> Asterisk -> SIP -> ATA 186 : No DTMF gets through * in outbound mode, Sip conf [204] type=friend username=204 secret=somesecretpassword host=dynamic canreinvite=no ; The follow line don't work dtmfmode=rfc2833 nat=1