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Amazon.com: RS232 Splitter, DTECH 4 Port Serial Expansion Box 1x4 COM Port Expander with Power Adapter for Sharing PCs and Capture Data : Electronics
![USB to 3 Ports RS232 Splitter Converter 9 Pins DB9 COM Switcher for PC RS-232C Serial Port Switch Sharing Device _ - AliExpress Mobile USB to 3 Ports RS232 Splitter Converter 9 Pins DB9 COM Switcher for PC RS-232C Serial Port Switch Sharing Device _ - AliExpress Mobile](https://ae01.alicdn.com/kf/H39dc8e63f5fb4dcea73018707eb3b9404/USB-to-3-Ports-RS232-Splitter-Converter-9-Pins-DB9-COM-Switcher-for-PC-RS-232C.jpg)
USB to 3 Ports RS232 Splitter Converter 9 Pins DB9 COM Switcher for PC RS-232C Serial Port Switch Sharing Device _ - AliExpress Mobile
![Network Serial Port Kit - Share and access any serial devices or create virtual null-modem cables over a TCP/IP network or the Internet. Network Serial Port Kit - Share and access any serial devices or create virtual null-modem cables over a TCP/IP network or the Internet.](https://www.fabulatech.com/img/products/nspk/help/add-connection.gif)
Network Serial Port Kit - Share and access any serial devices or create virtual null-modem cables over a TCP/IP network or the Internet.
![Serial Port Splitter - Share dataflow of one serial port among several applications or join dataflow of several serial port devices to one application. Serial Port Splitter - Share dataflow of one serial port among several applications or join dataflow of several serial port devices to one application.](https://www.fabulatech.com/img/products/sps/help/scr-split.gif)