Thanks — great, clear question about the two attributes. • play_dialtone: When set to

true

, LiveKit will play a dial tone to the SIP participant while an outbound call is being initiated. This gives the caller audible feedback that the system is placing the call (like the steady tone you hear when you pick up a handset). • play_ringtone: When set to

true

, LiveKit will play a ringing tone to the caller while the called party is being alerted. This indicates the outbound call has been routed and the recipient’s phone is ringing (the typical intermittent ring sound). Typical usage: include these attributes on requests such as

CreateSIPParticipantRequest

or

TransferSIPParticipantRequest

to control what audio the SIP participant hears during call setup or transfer. If you want, tell me which request you’re using (or share a short snippet) and I can show exactly where to set these flags and what behavior to expect. Sources: Company directory phone assistant | LiveKit Documentation | SIP Lifecycle Management Agent | LiveKit Documentation