Amazon.com: LFHUKEJI RJ45 to DB9, DB9 9-Pin Serial Port Male to RJ45 Female Cat5 Ethernet LAN Console Cable 9.8Ft : Industrial & Scientific
Serial to Power Over Ethernet (PoE) Cable - NetDirect PoE - DCE (female) – Grid Connect
Amazon.com: StarTech.com 1 Port RS232 to Ethernet IP Converter / Device Server - Aluminum - Serial over IP Device Server - Serial to IP Converter (NETRS2321P) : Electronics
RS232 RJ45 Adapter - NET232+ Serial Ethernet Device Server - 110V - U.S./North America - DTE (male) – Grid Connect
4-Port Industrial RS-232 to Ethernet Data Gateway TCP/IP - Coolgear
Is there any way to send serial data over physical ethernet layer with no encapsulation? - Electrical Engineering Stack Exchange
RS232 over Ethernet - TC Communications
Share Serial port Over Ethernet with Serial to Ethernet Connector
Industrial 2-Port RS-232 to Ethernet Data Gateway TCP/IP
PK70 EX 4-Port Serial to Ethernet Servers - NetBurner
Serial Ethernet Converter (RS232, RS485, RS422) - U.S. Converters LLC
Eight RS232 Ports, One Ethernet Port | Hackaday
Homepage - | Mbed
1 Port Serial Ethernet Device Server PoE - Serial Over IP Cat5/6 Extenders | StarTech.com