I am facing two specific issues: a protocol sync error and a persistent TCP connection state.

Environment:
Interface: ASTM.

Gateway: Moxa NPort 5110 (TCP Client Mode).

Server: Ensemble Business Service (EnsLib.ASTM.Service.TCPService).

Port: 5007.

Current Status & Observations:
Serial Layer: Verified. The Moxa "Async Monitor" shows RxCnt increasing when the instrument sends data. Hardware pins (DSR/CTS) are ON.