I’m trying to figure out why the BYOC edge connection fails when mapping Zendesk voice channels to Genesys Cloud in our EU environment. The edge is registered but shows ‘Unhealthy’ status in the Admin console. Error logs show: ‘Connection refused to SIP trunk: 503 Service Unavailable’ on /api/v2/edges/byoc. We are migrating from Zendesk Talk and need the edge to handle PSTN traffic. The Zendesk side is configured with SIP trunking and we have mapped the credentials in Genesys Cloud. However, the health check keeps failing. The edge version is 2024-1.0 and the Genesys Cloud org is in EU1. We have verified the firewall rules and ports 5060-5061 are open. The error occurs consistently during peak migration testing hours. We are using the standard BYOC setup with no custom configurations. The Zendesk integration was working fine before the migration attempt. We need to ensure the edge can handle the call volume from the Zendesk side. Any guidance on troubleshooting the SIP trunk registration would be helpful. We are also seeing latency spikes when the edge is in ‘Degraded’ state. This is blocking the final cutover phase. We have checked the DLP policies and they are not blocking the traffic. The issue seems specific to the BYOC edge connectivity. We are following the migration guide from Zendesk to Genesys Cloud but this step is failing. We need a working voice channel before the next sprint. The error does not provide detailed diagnostics beyond the 503 status. We have tried restarting the edge service but the issue persists. We are in the Europe/Paris timezone and the edge is deployed locally. We need to map the Zendesk voice queues to Genesys Cloud IVRs. This requires a stable edge connection. We are not sure if the issue is with the Zendesk side or the Genesys Cloud side. We have contacted support but they are asking for more details. We are providing this information to help with the diagnosis. We are hopeful for a quick resolution. We are eager to complete the migration and start using Genesys Cloud features. We are comparing the Zendesk workflows with Genesys Cloud flows to ensure parity. This edge issue is a critical blocker. We appreciate any help from the community.