I attached a PCAP of a complete SIP call that doesn’t show any additional RTP/SIP packets other than the INVITE/RINGING/OK/ACK/BYE packets, which makes me assume that either Twilio isn’t passing through the DTMF or Twilio IS passing it through but Ignition can’t detect. Right now, my guess is that my DTMF keys are being passed-through in the audio stream which perhaps ignition does not support/can’t detect? In-band DTMF tones within the G.711 audio stream are passed-through in the audio stream untouched.” Out of band SIP INFO is not currently supported. My twilio SIP trunk documentation states that they support: TLDR Does anyone know what DTMF signalling methods Ignition Supports? I think there is a mismatch between supported DTMF signalling methods between my twilio sip trunk and ignition sip. In the process of integrating voice alarming via Twilio SIP trunking and the Ignition Voice Alarming module, everything going well except for the DTMF signalling (pressing keys on phone, can’t get past ‘press any key to continue’ voice prompt).
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