WIDELY COMPATIBLE: Ethernet RJ45 to RS232 converter supports all for systems, such as for XP, for WIN7, for WIN8, for WIN10. Item Type:TXI022 RJ45 to RS232 Serial Network Adapter. Adapter Type: RJ45 Ethernet to RS232 Serial Port.
eBay
20pcs RJ45 Coupler Ethernet Cable Coupler LAN Connector Cat7 Cat6 Cat5e Ethernet Extender Adapter RJ45 Adapter Female to Female
Aliexpress UK
There are slight difference between the picture and the real item caused by light brightness,hope you can understand. Material: PVC.
eBay
C90C DTECH Port Powered RS232 to RS232 Serial Port Isolator Optic Electric Adapter to Protect PC and RS-232 Device
Aliexpress UK
This modular adapter has a DB9 female connector that plugs into DB9 RS232 serial port and converts it to an RJ45 connection. These modular adapters convert from a DB9 to an RJ45 socket jack (female).
eBay
5sets DB9 RS232 9Pin Female Male Connector RS232 COM Adapter With Plastic Case DIY
Aliexpress UK
Item Type:TXI022 RJ45 to RS232 Serial Network Adapter. WIDELY COMPATIBLE: Ethernet RJ45 to RS232 converter supports all for systems, such as for XP, for WIN7, for WIN8, for WIN10. Adapter Type: RJ45 Ethernet to RS232 Serial Port.
eBay
10PCS/LOT New RS232 serial port connector DB9 male and female socket/Plug connector 9pin copper RS232 COM socket adapter
Aliexpress UK
RS232(DB9) Female Size : 31 x 12 x 17mm(L W H). This console adapter contains a female RJ-45 connector and a female DB-9 Serial connector. Connector Type: RJ45 Female, RS232 female connector.
eBay
Jasoz USB to RS232 DB9 Serial Female Converter Adapter CableFor Windows 7 XP Cashier Register Modem USB RS232 COM
Aliexpress UK
9Pin RS232 Serial to Cat 5 RJ45 Ethernet Adapter. ✔️ Connector: RJ45 Male to 9 Pin RS232 Female. ✔️ DB9 male to RJ45 male connector cable for TCP/IP network interface doual-way conversion, with the serial port network function, support serial data and network data bi-directional transparent transmission.
eBay
5PCS RS232 Serial Port Connector DB9 Female Male Socket Plug Connector 9pin Copper RS232 COM Socket Adapter Plastic Shell
Aliexpress UK
This modular adapter has a DB9 female connector that plugs into DB9 RS232 serial port and converts it to an RJ45 connection. These modular adapters convert from a DB9 to an RJ45 socket jack (female).
eBay
USB to DB25 Male Printer RS232 Serial Cable for Epson Printer TM-T88VI TM-T88V，RS232 Serial Adapter
Aliexpress UK
No need to install the driver, plug and play. Precise connection: USB to RJ45 interface is closely matched to ensure stable connection, reduce the possibility of data loss, and make the debugging process more stable and accurate.
eBay
USB 2.0 to Serial DB-9 RS232 Adapter, Windows 7/8/10/11/32/64/XP/RS232 to USB Converter
Aliexpress UK