Outbound predictive campaigns on the Ohio BYOC pool are freezing at 98%. Console traces show a 403 Forbidden header mismatch on the proxy. Architect v2024.3.1 routes the session to the SIP registrar, but the INVITE packets just stall. Dialer logs dump a SIP_REG_TIMEOUT after exactly 12 seconds. Failover rules are set to strict, yet the trunk won’t route through the backup carrier. Queue just sits there doing jack all.