Best Modem Cables for PC of 2026

The StarTech.com 10 ft Cross Wired DB9 to DB25 Serial Null Modem Cable is a reliable and durable cable designed for connecting a 9-pin serial device to a 25-pin serial port, or transferring files from PC-to-PC via a serial connection. It features molded connectors for strain relief and high-quality shielding to prevent EMI. The 10ft cable is gray in color and made of PVC. Please note that this is a cross-wired/null modem cable and may not work for straight-through connections.

The DTech DB9 RS232 Serial Cable is a 15ft male to female null modem cord with full handshaking and 7 wire crossover, which connects your computer to a device with a COM port RS-232 compatible interface. This standard shielded DE9 rs232 cable is wired as a 9 pin serial port null-modem cord that has a DB9 female to male connector on each end equipped with screws to ensure an easy and solid extension connection for stable serial cross data communication. This 15 feet long null serial adapter is perfect for connecting your PC or laptop to some old RS232C equipment like a scanner, printer, or microcontroller.

This DTech DB9 RS232 Serial Cable is designed to extend a COM port connection between your computer and an old device with RS-232 compatibility. This simple serial null modem cable is wired as a 9 pin serial port Null-Modem cord with 2-3 crosslinked lines, making it a standard shielded DE9 female RS232 cable with AL foil. The DB9 female to female adapter extender is equipped with screws on each end, ensuring a stable and easy connection for serial cross data communication. This cord is perfect for connecting RS232C equipment like scanners, printers, cameras, microcontrollers, and more.

DTech Serial Cable is a 15-foot black cable that connects your computer to older devices with RS-232 compatibility. It features a simple design with only TX/RX data and signal ground wires connected, making it easy to use. The cable comes with screws on each end for a stable connection and is equipped with 30AWG gauge wires that are easy to solder. This null modem cable is ideal for connecting equipment like scanners, printers, cameras, and more, making data communication hassle-free for you.

The Pidwaok DB9 RS232 Cable offers a smart left-angled connector on one end that helps you save space and avoid strain when plugging into tight or recessed ports. This makes it easier to connect your devices without damaging the ports. The straight connector on the other end fits most devices, keeping your setup neat and professional. You can count on steady and error-free data transfer, which is important for tasks where reliable communication matters. Plus, this 10-foot cable is built tough with strain reliefs and a strong jacket, so it stands up to daily use in both office and industrial settings.

DTech DB9 RS232 Serial Cable Female to Female Null Modem Cord is a 1.5ft female to female serial null modem cable that connects your computer to devices with COM port RS-232 compatible interface. The cable is wired as a 9 pin serial port Null-Modem cord that 2-3, 4-6, 7-8 line are cross-linked, and it comes with a standard shielded DE9 rs232 cable female to female with AL foil. Each end of the cable is equipped with screws to ensure an easy and solid connection for stable serial cross-data communication. The wires inside are of 30AWG gauge and easy to solder to, and they connect to the pins in the order of the standard wire color code. The cable is perfect for hooking up your PC laptop to some old RS232C equipment like a scanner, modem, printer, plotter, camera, barcode/embroidery machine, touchscreen, microcontroller, factory test equipment.

The PNGKNYOCN 4.5 Feet Modem Serial Cable features a DB9 female connector and a DB25 male connector, allowing you to connect a serial printer to a 25-pin serial port or transfer files from PC to PC via a serial connection. It uses high-quality nickel-plated connectors and plugs and high-quality PVC injection-molded housing, which has the functions of wear resistance, durability, and smooth transmission. The cable also allows two DTE or DCE devices to communicate without data transmission conflicts. It is ideal for using a 9-pin serial computer to connect 25-hole bill printer and other equipment.

DTech Serial Cable is a simple and reliable solution for connecting your computer to devices with a COM port RS-232 interface. This 5-foot cable features a DB9 male to male connector with screws for a secure connection. The cable is wired as a DE9 9-pin serial port Null-Modem cord with crosslinked TX/RX data and signal ground wires. It is compatible with standard shielded RS232 cords and is equipped with AL foil for added protection. The wires inside are easy to solder to, making installation a breeze. With DTech Serial Cable, you can easily connect your PC or laptop to old RS232C equipment such as scanners, modems, printers, and more.

The Generic Cat8 Flat Cable offers ultra-fast internet speeds, supporting data transfers up to 40 Gbps with a bandwidth of 2000 MHz. This means you can enjoy smooth gaming, quick downloads, and seamless video streaming without interruptions. It works well with older cable types, so you can upgrade your setup without worrying about compatibility. The cable is built to last, resisting wear from bending, sunlight, and humidity, making it a reliable choice for both indoor and outdoor use. Plus, its flat design keeps your space tidy by reducing tangles and fitting easily under doors or carpets.

The Letotech USB Serial Cable DB9 CP2102 ZT232 is a null modem DCE adapter cable that allows you to add a Null Modem RS232 serial port to your laptop or desktop computer through USB. It is also suitable for PC control of TV and smart TV. This cable uses the CP2102+ZT232 chip and features a DB9 female adapter cable. The null modem PINOUT includes DB9#2-TX(yellw), 3-RX(orang), 5-GND(blk), 7-CTS(green), 8-RTS(brown).