Thanks — I’m sorry you’re seeing failures on the first 1–2 attempts. I’ll help narrow this down. From what you described (agent connects only after 2–3 retries, both in the frontend and via SIP), the most likely causes are: • Cold starts: agent processes may be scaled to zero and take time to spin up, causing the first call to time out. • No or insufficient agent workers: no worker ready to accept the job when the first call arrives. • Dispatch/SIP misconfiguration: SIP trunk or dispatch rules not routing immediately to an agent. • Network/ICE/TURN delays: media negotiation (ICE) or TURN fallback can take extra time and cause initial failures. • Job timeout/startup delay: the dispatch system times out (≈10s) before the agent finishes initialization. To diagnose quickly, please tell me: 1. Are you on LiveKit Cloud or self-hosted? 2. Do you see errors in agent logs when a first attempt fails? If yes, paste the relevant lines (timestamps helpful). 3. Are your agents configured to scale to zero / do you run multiple workers with the same

agent_name

? 4. Is this behavior only for SIP calls, only for frontend, or identical for both? Any differences in error messages? 5. Can you run the connection test (

checkWebRTC()

,

checkTURN()

,

checkWebSocket()

) and share results if possible? Immediate things you can try while I review your answers: • Run

lk agent status

and

lk agent logs

around a failed attempt to look for timeouts or startup delays. • Ensure you have multiple agent workers for redundancy and avoid single-worker setups. • If using LiveKit Cloud and cold starts are enabled, keep at least one warm/pre-warmed instance or upgrade plan to avoid cold starts. • Verify SIP dispatch rules on your trunk and ensure explicit dispatch is set if you need predictable routing. Share the answers and any log snippets and I’ll pinpoint the most likely root cause and exact next steps. Sources: Deploying to production | LiveKit Docs | examples/frontdesk | livekit/livekit_composite | DeepWiki | Agents (Python) | livekit/livekit_composite | DeepWiki | Agents telephony integration | LiveKit docs | Firewall Tips