![Amazon.com: LinksTek 2-Port PCI Express RS-232 DB9 Serial Port Card for Windows XP, Vista,7, 8.x, 10, 11 32/64bit and Linux PCs, PCIE RS232 Card, PCIE Serial DB9 Port Card (PCIE-SE2) : Electronics Amazon.com: LinksTek 2-Port PCI Express RS-232 DB9 Serial Port Card for Windows XP, Vista,7, 8.x, 10, 11 32/64bit and Linux PCs, PCIE RS232 Card, PCIE Serial DB9 Port Card (PCIE-SE2) : Electronics](https://m.media-amazon.com/images/I/61+YIg2zWtL._AC_UF894,1000_QL80_.jpg)
Amazon.com: LinksTek 2-Port PCI Express RS-232 DB9 Serial Port Card for Windows XP, Vista,7, 8.x, 10, 11 32/64bit and Linux PCs, PCIE RS232 Card, PCIE Serial DB9 Port Card (PCIE-SE2) : Electronics
![Amazon.com: Cable Matters USB to Serial Adapter Cable (USB to RS232, USB to DB9) 3 Feet : Electronics Amazon.com: Cable Matters USB to Serial Adapter Cable (USB to RS232, USB to DB9) 3 Feet : Electronics](https://m.media-amazon.com/images/I/71W3B0SWvSL.jpg)
Amazon.com: Cable Matters USB to Serial Adapter Cable (USB to RS232, USB to DB9) 3 Feet : Electronics
![Amazon.com: LinksTek 2-Port PCI Express RS-232 DB9 Serial Port Card for Windows XP, Vista,7, 8.x, 10, 11 32/64bit and Linux PCs, PCIE RS232 Card, PCIE Serial DB9 Port Card (PCIE-SE2) : Electronics Amazon.com: LinksTek 2-Port PCI Express RS-232 DB9 Serial Port Card for Windows XP, Vista,7, 8.x, 10, 11 32/64bit and Linux PCs, PCIE RS232 Card, PCIE Serial DB9 Port Card (PCIE-SE2) : Electronics](https://m.media-amazon.com/images/I/713kR74G5-L._AC_UF350,350_QL80_.jpg)
Amazon.com: LinksTek 2-Port PCI Express RS-232 DB9 Serial Port Card for Windows XP, Vista,7, 8.x, 10, 11 32/64bit and Linux PCs, PCIE RS232 Card, PCIE Serial DB9 Port Card (PCIE-SE2) : Electronics
![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 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](https://m.media-amazon.com/images/I/81GIXN7Li4L.jpg)
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
![Amazon.com: YIOVVOM Connector DB9 RS232 D-SUB Male Serial Adapter 9-pin Port Adapter to Terminal Connector Signal Module with case(Male Connector, DB9 5+5 with case A) : Electronics Amazon.com: YIOVVOM Connector DB9 RS232 D-SUB Male Serial Adapter 9-pin Port Adapter to Terminal Connector Signal Module with case(Male Connector, DB9 5+5 with case A) : Electronics](https://m.media-amazon.com/images/I/61rE7FI2jtL.jpg)
Amazon.com: YIOVVOM Connector DB9 RS232 D-SUB Male Serial Adapter 9-pin Port Adapter to Terminal Connector Signal Module with case(Male Connector, DB9 5+5 with case A) : Electronics
![Amazon.com: 2 Port RS-232C DB9 Manual Switch for PC rs232 Serial Port Switch Sharing Splitter Device Steel Case MT-232-2 : Electronics Amazon.com: 2 Port RS-232C DB9 Manual Switch for PC rs232 Serial Port Switch Sharing Splitter Device Steel Case MT-232-2 : Electronics](https://m.media-amazon.com/images/I/51QdV-6TgnL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: 2 Port RS-232C DB9 Manual Switch for PC rs232 Serial Port Switch Sharing Splitter Device Steel Case MT-232-2 : Electronics
![Amazon.com: RJ45 to RS232,LFHUKEJI DB9 9-Pin Serial Port Male to RJ45 Female Cat5 Ethernet LAN Console 3.3Ft : Industrial & Scientific Amazon.com: RJ45 to RS232,LFHUKEJI DB9 9-Pin Serial Port Male to RJ45 Female Cat5 Ethernet LAN Console 3.3Ft : Industrial & Scientific](https://m.media-amazon.com/images/I/61-9fAgZe1L._AC_UF894,1000_QL80_.jpg)
Amazon.com: RJ45 to RS232,LFHUKEJI DB9 9-Pin Serial Port Male to RJ45 Female Cat5 Ethernet LAN Console 3.3Ft : Industrial & Scientific
![Amazon.com: CERRXIAN RS232 to Ethernet Serial Device Server, 1 Port RS 232 DB9 Serial to Ethernet TCP IP Device Server Converter : Electronics Amazon.com: CERRXIAN RS232 to Ethernet Serial Device Server, 1 Port RS 232 DB9 Serial to Ethernet TCP IP Device Server Converter : Electronics](https://m.media-amazon.com/images/I/716hFwDD8fL._AC_UF894,1000_QL80_.jpg)
Amazon.com: CERRXIAN RS232 to Ethernet Serial Device Server, 1 Port RS 232 DB9 Serial to Ethernet TCP IP Device Server Converter : Electronics
![Amazon.com: DTech Serial Splitter 8 Port, Industrial RS232 Expander COM Port Switch Box with Power Adapter for Sharing PCs and Capture Data - 1x8 : Electronics Amazon.com: DTech Serial Splitter 8 Port, Industrial RS232 Expander COM Port Switch Box with Power Adapter for Sharing PCs and Capture Data - 1x8 : Electronics](https://m.media-amazon.com/images/I/61R0c0D2rIL.jpg)
Amazon.com: DTech Serial Splitter 8 Port, Industrial RS232 Expander COM Port Switch Box with Power Adapter for Sharing PCs and Capture Data - 1x8 : Electronics
![Amazon.com: RS232 Serial DB9 Male COM Port w/IDC Cable & Bracket Slot Card for PC Desktop Computer : Electronics Amazon.com: RS232 Serial DB9 Male COM Port w/IDC Cable & Bracket Slot Card for PC Desktop Computer : Electronics](https://m.media-amazon.com/images/I/61kcb8+uI6L._AC_UF894,1000_QL80_.jpg)
Amazon.com: RS232 Serial DB9 Male COM Port w/IDC Cable & Bracket Slot Card for PC Desktop Computer : Electronics
![Amazon.com: PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 Serial / RS232 COM Port Adapter 16C550 UART WCH382 Chip for Desktop PC Windows 10 with Low Bracket : Electronics Amazon.com: PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 Serial / RS232 COM Port Adapter 16C550 UART WCH382 Chip for Desktop PC Windows 10 with Low Bracket : Electronics](https://m.media-amazon.com/images/I/61le-7WTYpL._AC_UF894,1000_QL80_.jpg)
Amazon.com: PCIE 2 Port Serial Expansion Card PCI Express to Industrial DB9 Serial / RS232 COM Port Adapter 16C550 UART WCH382 Chip for Desktop PC Windows 10 with Low Bracket : Electronics
![Amazon.com: DriverGenius 4XRS232, 4 Port USB to DB9 RS232 Serial Adapter Converter with 12 X LEDs - Win11 & Mac (M/M, Metal) : Electronics Amazon.com: DriverGenius 4XRS232, 4 Port USB to DB9 RS232 Serial Adapter Converter with 12 X LEDs - Win11 & Mac (M/M, Metal) : Electronics](https://m.media-amazon.com/images/I/61ESHCpVi6L._AC_UF894,1000_QL80_.jpg)
Amazon.com: DriverGenius 4XRS232, 4 Port USB to DB9 RS232 Serial Adapter Converter with 12 X LEDs - Win11 & Mac (M/M, Metal) : Electronics
![Amazon.com: StarTech.com 4 Port USB to Serial RS232 Adapter - Wall Mount - Din Rail - COM Port Retention - FTDI USB to DB9 RS232 Hub (ICUSB2324I) : Electronics Amazon.com: StarTech.com 4 Port USB to Serial RS232 Adapter - Wall Mount - Din Rail - COM Port Retention - FTDI USB to DB9 RS232 Hub (ICUSB2324I) : Electronics](https://m.media-amazon.com/images/I/71d5VvmcKtL._AC_UF894,1000_QL80_.jpg)
Amazon.com: StarTech.com 4 Port USB to Serial RS232 Adapter - Wall Mount - Din Rail - COM Port Retention - FTDI USB to DB9 RS232 Hub (ICUSB2324I) : Electronics
![Amazon.com: 2 Port Serial 9pin Manual Switch Selector Box 2-way RS232 Female Serial port (RS232) 2:1 Seletor : Electronics Amazon.com: 2 Port Serial 9pin Manual Switch Selector Box 2-way RS232 Female Serial port (RS232) 2:1 Seletor : Electronics](https://m.media-amazon.com/images/I/41NTuv5UVvL._AC_UF894,1000_QL80_.jpg)
Amazon.com: 2 Port Serial 9pin Manual Switch Selector Box 2-way RS232 Female Serial port (RS232) 2:1 Seletor : Electronics
![Amazon.com: RS232 Splitter, DTECH 4 Port Serial Expansion Box 1x4 COM Port Expander with Power Adapter for Sharing PCs and Capture Data : Electronics Amazon.com: RS232 Splitter, DTECH 4 Port Serial Expansion Box 1x4 COM Port Expander with Power Adapter for Sharing PCs and Capture Data : Electronics](https://m.media-amazon.com/images/I/613iN0-rGZL._AC_UF894,1000_QL80_.jpg)
Amazon.com: RS232 Splitter, DTECH 4 Port Serial Expansion Box 1x4 COM Port Expander with Power Adapter for Sharing PCs and Capture Data : Electronics
![Amazon.com: StarTech.com 4 Port USB to Serial RS232 Adapter - DB9M - RS232 Extension - Serial to USB (ICUSB2324) : Electronics Amazon.com: StarTech.com 4 Port USB to Serial RS232 Adapter - DB9M - RS232 Extension - Serial to USB (ICUSB2324) : Electronics](https://m.media-amazon.com/images/I/61VAXtkk+kL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: StarTech.com 4 Port USB to Serial RS232 Adapter - DB9M - RS232 Extension - Serial to USB (ICUSB2324) : Electronics
![Amazon.com: StarTech.com 8-Port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Card - 16C1050 UART - Multiport Serial DB9 Controller/Expansion Card - 15kV ESD Protection - Windows & Linux (PEX8S1050) : Electronics Amazon.com: StarTech.com 8-Port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Card - 16C1050 UART - Multiport Serial DB9 Controller/Expansion Card - 15kV ESD Protection - Windows & Linux (PEX8S1050) : Electronics](https://m.media-amazon.com/images/I/81ZhiEoIX8L.jpg)
Amazon.com: StarTech.com 8-Port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Card - 16C1050 UART - Multiport Serial DB9 Controller/Expansion Card - 15kV ESD Protection - Windows & Linux (PEX8S1050) : Electronics
![Amazon.com: StarTech.com 1-Port PCI Express Serial Card, PCIe to RS232 (DB9) Serial Interface Card, PC Serial Card, 16C1050 UART, Standard/Low Profile Brackets, COM Retention, Windows/Linux (11050-PC-SERIAL-CARD) : Electronics Amazon.com: StarTech.com 1-Port PCI Express Serial Card, PCIe to RS232 (DB9) Serial Interface Card, PC Serial Card, 16C1050 UART, Standard/Low Profile Brackets, COM Retention, Windows/Linux (11050-PC-SERIAL-CARD) : Electronics](https://m.media-amazon.com/images/I/71dx4LZ3AcL._AC_UF894,1000_QL80_.jpg)
Amazon.com: StarTech.com 1-Port PCI Express Serial Card, PCIe to RS232 (DB9) Serial Interface Card, PC Serial Card, 16C1050 UART, Standard/Low Profile Brackets, COM Retention, Windows/Linux (11050-PC-SERIAL-CARD) : Electronics
![Amazon.com: USB Serial db9 ft232r USB rs232 Null Modem Cable pc Control tv Cable (2-TXD(Yellow), 3-RXD(Orange),5-GND(GND), 7-CTS(Green),8-RTS(Brown), 1/4/6/9-NC) : Electronics Amazon.com: USB Serial db9 ft232r USB rs232 Null Modem Cable pc Control tv Cable (2-TXD(Yellow), 3-RXD(Orange),5-GND(GND), 7-CTS(Green),8-RTS(Brown), 1/4/6/9-NC) : Electronics](https://m.media-amazon.com/images/I/71VRSwkyeKL._AC_UF894,1000_QL80_.jpg)
Amazon.com: USB Serial db9 ft232r USB rs232 Null Modem Cable pc Control tv Cable (2-TXD(Yellow), 3-RXD(Orange),5-GND(GND), 7-CTS(Green),8-RTS(Brown), 1/4/6/9-NC) : Electronics
![Amazon.com: StarTech.com 2-Port PCI Express Serial Interface Card, Dual Port PCIe to RS232 (DB9) Serial Card, 16C1050 UART, Low/Full Profile Brackets, COM Retention, for Windows/Linux (21050-PC-SERIAL-LP) : Electronics Amazon.com: StarTech.com 2-Port PCI Express Serial Interface Card, Dual Port PCIe to RS232 (DB9) Serial Card, 16C1050 UART, Low/Full Profile Brackets, COM Retention, for Windows/Linux (21050-PC-SERIAL-LP) : Electronics](https://m.media-amazon.com/images/I/313iMZRJNDL.jpg)
Amazon.com: StarTech.com 2-Port PCI Express Serial Interface Card, Dual Port PCIe to RS232 (DB9) Serial Card, 16C1050 UART, Low/Full Profile Brackets, COM Retention, for Windows/Linux (21050-PC-SERIAL-LP) : Electronics
![Amazon.com: StarTech.com 8 Port USB to Serial RS232 Adapter - Wall Mount - Din Rail - COM Port Retention - FTDI USB to DB9 RS232 Hub (ICUSB2328I) : Electronics Amazon.com: StarTech.com 8 Port USB to Serial RS232 Adapter - Wall Mount - Din Rail - COM Port Retention - FTDI USB to DB9 RS232 Hub (ICUSB2328I) : Electronics](https://m.media-amazon.com/images/I/81L02bSGxbL._AC_UF894,1000_QL80_.jpg)