Could someone explain why outbound calls via our primary BYOC trunk are failing with a SIP 408 Request Timeout immediately after the ‘Set Contact Attribute’ block in the Architect flow?
This happens consistently when the script attempts to bridge to the trunk, despite successful registration and valid credentials on all 15 BYOC lines.
Thanks for the help.
You need to verify the BYOC trunk’s timeout thresholds in the platform settings. The default SIP timers often conflict with carrier-specific processing times, especially when script blocks introduce latency before bridging.
Check the invite_timeout and session_timeout values under /api/v2/telephony/providers/edges. Increasing these to 30 seconds usually resolves the 408 issue during complex script execution.