Quick question about SIP 408 Timeout during JMeter SIP load test

Quick question about SIP 408 Request Timeout errors when simulating high-concurrency outbound calls. Running JMeter 5.6.2 from Singapore (Asia/Singapore) with 200 concurrent threads hitting the Genesys Cloud SIP trunk. The calls drop before ringing. Is there a specific timeout configuration in the Architect flow or SIP trunk settings I should adjust for this volume?

Thanks for the help.