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
TTL-232R-3V3 USB to TTL Serial Cable Adapter FTDI Chipset FT232 USB to 3.3v 5v TTL UART Serial RS232 Download Cable
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
2-in-1 2500Mbps Ethernet Adapter USB 3.0 Type-C to RJ45 Wired Network Card Adapter 2.5G High Speed Ethernet Adapter For Laptop
Aliexpress UK
1 X USB to RJ45 Cable. Wire: UL20251 bare copper 28AWG 8C OD2.5 8.5MM UL standard wire.
eBay
2 In 1 Type C To Ethernet Adapter Rj45 Adapter For Huawei Xiaomi Oppo Apple Laptop To Ethernet Charging Adapter
Aliexpress UK
1 X USB to RJ50 Cable. Color: black. 100% new and high quality.
eBay
USB C to Ethernet Adapter Type-C to RJ45 Adapter 1000Mbps Gigabit LAN Network Adapter 60W PD Type-C Ports & 2 USB 3.0 Ports
Aliexpress UK
1 X USB to RJ50 Cable. Color: black. 100% new and high quality.
eBay
USB C to Ethernet Adapter Type-C to RJ45 Adapter 1000Mbps Gigabit LAN Network Adapter 60W PD Type-C Ports & 2 USB 3.0 Ports
Aliexpress UK
Built-in FTDI chip, as long as you can connect to the Internet, it will automatically install the driver. (Huawei H3-S1500 series is not supported,). Type: USB2.0 RS232 to RJ45. USB Serial Cable, USB to Serial Cable, USB CONSOLE Cable.
eBay
1000Mbps Ethernet LAN Network Adapter USB C Gigabit Adapter Type-C to RJ45 Adapter 60W PD Type-C Ports & 2 USB 3.0 Ports
Aliexpress UK
Feature: 1. UART Interface: 4 RS232 or 4 RS485 RS422 Composite Ports (Using Adapters). Item Type: RS232 RS485 to Ethernet Converter. Network Interface: 2 x 10/100M Adaptive RJ45 Ports. Equipped with 32bit ARM processor, it makes the data more stable.
eBay
USB 2.0 To LAN RJ45 Ethernet 10/100Mbps Networks Card Adapter for Win8 Mac OS PC USB A Connectors Converter Adapter USB Adapter
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 Type C to RJ45 Lan Network Card Ethernet Card Hub Splitter Adapter 10GBit/s for MacBook Xiaomi Samsung Windows Huawei PC
Aliexpress UK