Thanks — I’m responding to your question about passing DTMF to

TransferSIPParticipantRequest

. Short answer: You cannot pass DTMF tones directly inside

TransferSIPParticipantRequest

. That request is for SIP REFER-style transfers and does not include a field to carry DTMF. What you can do instead: • Send DTMF before initiating the transfer using the room/local participant API. For example, publish DTMF from the agent to the SIP participant so the destination IVR or system receives the tones prior to transfer. ◦ Example (conceptual):

await room.local_participant.publish_dtmf(code=1, digit="1")

• Collect DTMF from the caller (if you need menu input) using the

GetDtmfTask

, then trigger the transfer based on the collected digit(s). ◦ Example (conceptual):

result = await GetDtmfTask(num_digits=1)
    digit = result.user_input
    # decide whether/where to transfer based on digit

If you tell me which SDK/language you’re using and whether you need the tones sent before transfer or captured from the caller, I can give a short code example tailored to your setup. Sources: Company directory phone assistant | LiveKit Documentation | Agents telephony integration | LiveKit Documentation | Building an Automated IVR Menu Caller | LiveKit Documentation | GetDtmfTask | LiveKit Documentation