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RS232 over Ethernet - TC Communications
DTECH Serial to Ethernet Converter Adapter RS232 RS422 RS485 to TCP IP Device Server Supports DHCP DNS Modbus RTU/TCP 10/100M Power Over Ethernet POE
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Is there any way to send serial data over physical ethernet layer with no encapsulation? - Electrical Engineering Stack Exchange
ES-279 | Brainboxes
How to extend RS232 over Ethernet with Serial to Ethernet Device Server – Atac Technology Co., Ltd.