Dealing with a very strange bug here with SIP 408 Request Timeout errors when traffic shifts to secondary BYOC trunks in Asia/Singapore. The primary trunk handles load fine, but failover triggers immediate timeouts on outbound calls. We verified carrier connectivity via tcpdump, showing successful SIP OPTIONS but failed INVITEs. This contradicts the Genesys Docs regarding keep-alive intervals. Any insights on timeout configurations for multi-trunk setups?