Timeouts and failover

• Sinch enforces a 5-second response timeout. Slow responses may affect call quality.
• Webhook requests are blocking: execution of the call flow pauses until the endpoint responds, and the next command runs once a response has been received.
• Webhook URLs are configured on the service via the Services API or the Dashboard. The webhook SVAML command carries its own url and fallbackUrl for mid-call events.