Best Ethernet Modem Cables in 2026

Daisy
Last Updated: Jul 17, 2026

At a Glance: Our Top Picks for Ethernet Modem Cables

CableCreation 3.3 Feet USB to RS232 Serial Cable with Prolific PL2303 Chip, DB9 Adapter for Windows 10, 8.1, 8,7, Vista, XP, Linux, Mac OS X, 1M /Black
#TOP1
Cablecreation 3.3 Feet Usb To Rs232 Serial Cable
9.7
PM SCORE
DTech DB9 9 Pin Serial Cable 6ft Male to Male RS232 Straight Through, Laptop
#TOP2
Dtech Db9 9 Pin Serial Cable 6Ft Male
9.5
PM SCORE
DTech 1.5ft DB9 Serial Cable COM Port Male to Male RS232 Straight Through 9 Pin Data Cord (0.5 Meter, Black)
#TOP3
Dtech 1.5Ft Db9 Serial Cable Com Port Male
9.5
PM SCORE

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Summary of the Best Ethernet Modem Cables of 2026

Cablecreation 3.3 Feet Usb To Rs232 Serial Cable With Prolific Pl2303 Chip, Db9 Adapter For Windows 10, 8.1, 8,7, Vista, Xp, Linux, Mac Os X, 1M /Black

CABLECREATION
CD0477
0.15 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
CableCreation 9.95

Features

►Important Tips: ★ Please install drivers from our official website before get it to work.★ Connect serial DB 9 (9 pin) devices such as a modem to a USB port on your computer. USB port with 1Mbps data transfer rate. ★ This is RS232 port but not VGA port!!!

►Latest Prolific PL2303 chipset: supports Windows 10 / 8.1 / 8 / 7 /Vista / XP / 2000 / Linux 2.4 or above /and Mac OS X 10.6 and above.

►Easy Connectivity: USB to RS232 adapter works with modems, ISDN Terminal Adapters, digital cameras, label writers, palm PCs, PDAs, cashier register, CNC, PLC controller, tax printer, POS, bar code scanner, Label printer, and devices with DB9 serial ports. NOT COMPATIBLE with Cutting Plotter, SCM.

►Premium Material: Tinned Copper Conductor and triple shielding ensure the best data transfer rate. USB bus powered, no external power adapter required.

►What You Get: 1Pc * 3.3FT CableCreation USB to RS232 Serial Male Cable, we provide 24-month warranty and lifetime customer services.

Dtech Db9 9 Pin Serial Cable 6Ft Male To Male Rs232 Straight Through, Laptop

DTECH
DT-9005A 2M
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
DTECH Co.,Ltd 9.89

Features

9 pin male to male adapter connects your computer to device with RS-232 compatible (COM) interface (NOT VGA cable for computer to monitor)

Serial cable male to male DB9 connector on each end equipped with screws to ensure an easy and solid connection for stable 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

It is pin to pin wired as a DE9 serial Straight Through cord (pinout :1-1, 2-2, 3-3, 4-4,......, 8-8, 9-9, G-G); standard shielded with AL foil

6 feet short serial adapter DB-9 cable for hooking up PC laptop to some old RS232C equipment like scanner, Modem, printer, plotter, camera, barcode / embroidery machine, touchscreen, microcontroller, factory test equipment

Dtech 1.5Ft Db9 Serial Cable Com Port Male To Male Rs232 Straight Through 9 Pin Data Cord (0.5 Meter, Black)

DTECH
DT-9005A-0.5M
9.60 X 7.20 X 0.30 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
DTECH Co.,Ltd 9.89

Features

1.5ft 9 pin serial port cable connects your computer to device with RS-232 compatible (COM port) interface (NOT VGA-cable that connect computer-to-monitor)

Black male to male serial cable DB9 connector on each end equipped with screws to ensure an easy and solid connection for stable 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

It is pin to pin wired as a RS232 serial Straight Through com cord (pinout :1-1, 2-2, 3-3, 4-4,......, 8-8, 9-9, G-G); standard shielded with AL foil

1.5 feet short RS232 serial cord for hooking up PC laptop to some old RS232C equipment like scanner, Modem, printer, plotter, camera, barcode / embroidery machine, touchscreen, microcontroller, factory test equipment

Dtech 15Ft Db9 Serial Cable Com Port Male To Male Rs232 Straight Through 9 Pin Data Cord

DTECH
DT-9005A 5M
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
DTECH Co.,Ltd 9.89

Features

(NOT-15 pin-VGA-Monitor-CABLE) It's 5m DB9 serial Male to Male cable connects your computer to device with RS232 compatible (COM) port

9 pin DB9 connector on each end equipped with screws to ensure an easy and solid connection for data communication

15 feet serial extension cord m/m is long enough for unites side by side; the wires inside the cable are of 30AWG gauge and easy to solder to

Shielded RS-232 com port cord is with AL foil and all 9 pins are wired STAIGHT Through pin-to-pin (pinout: 1-1, 2-2, 3-3, 4-4,......, 8-8, 9-9, G-G)

Extra long COM port cable male to male plug for hooking up PC laptop to some old RS-232 equipments like scanner, Modem, printer, plotter, camera, barcode / embroidery machine, microcontroller,test equipment

#TOP5
Best For Usb

Tera Grand - Premium Usb 2.0 To Rs232 Serial Db9 Adapter Cable 6 Feet - Supports Windows 11, 10, 8, 7, Vista, Xp, 2000, 98, Linux And Mac - Built With Ftdi Chipset And Thumbscrews

TERA GRAND
USB2-RS232TS-06
5.50 X 1.50 X 9.00 Inches
0.25 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
VENUS ONE 7.65

Features

OS SUPPORT - Supports Windows 11, 10, 8, 7, Vista, 2000, XP, 98, Apple MAC OS8 or higher, Linux 2.4.0 and later, OpenBSD 2.9 and later & FreeBSD 4.7 and later. This cable is NOT used for computer VGA monitors which use a HDB15 (15-pin) VGA connector.

USB2 TO RS232 - Installed as a standard Windows COM ports, Full RS-232 modem control signals, RS-232 data signals; TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND

CONNECT SERIAL DB9 DEVICES - Provides instant connectivity with modems, ISDN terminal adapter, PDA, bar code scanner, label printer, and devices with DB9 SERIAL ports. This cable is NOT used for VGA monitors which use a HDB15 (15-pin) VGA connector.

FTDI CHIPSET - Built with FTDI chipset, Powered by USB port, Download the latest driver from the Tera Grand website. This cable is NOT used for VGA monitors which use a HDB15 (15-pin) VGA connector.

IMPORTANT - This cable is NOT used for computer VGA monitors which use a HDB15 (15-pin) VGA connector. This cable is used for RS232 serial devices. Please double check if your RS232 Serial device needs a cable with Male Thumbscrews or Female Hex Jack Nuts. These connector styles are not interchangeable.

#TOP6
Best For Usb

Tera Grand - Premium Usb 2.0 To Rs232 Serial Db9 Adapter Cable 10 Feet - Supports Windows 11, 10, 8, 7, Vista, Xp, 2000, 98, Linux And Mac - Built With Ftdi Chipset And Thumbscrews

TERA GRAND
USB2-RS232TS-10
10.00 X 4.00 X 0.60 Inches
0.72 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
VENUS ONE 7.65

Features

OS SUPPORT - Supports Windows 11, 10, 8, 7, Vista, 2000, XP, 98, Apple MAC OS8 or higher, Linux 2.4.0 and later, OpenBSD 2.9 and later & FreeBSD 4.7 and later. This cable is NOT used for computer VGA monitors which use a HDB15 (15-pin) VGA connector.

USB2 TO RS232 - Installed as a standard Windows COM ports, Full RS-232 modem control signals, RS-232 data signals; TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND

CONNECT RS232 SERIAL DB9 DEVICES - Provides instant connectivity with modems, ISDN terminal adapter, PDA, bar code scanner, label printer, and devices with DB9 SERIAL ports. This cable is NOT used for VGA monitors which use a HDB15 (15-pin) VGA connector.

FTDI CHIPSET - Built with FTDI chipset, Powered by USB port, Download the latest driver from the Tera Grand website. This cable is NOT used for VGA monitors which use a HDB15 (15-pin) VGA connector.

IMPORTANT - This cable is NOT used for computer VGA monitors which use a HDB15 (15-pin) VGA connector. This cable is used for RS232 serial devices. Please double check if your RS232 Serial device needs a cable with Male Thumbscrews or Female Hex Jack Nuts. These connector styles are not interchangeable.

Dtech Db9 Rs232 Serial Cable Male To Female Extension Null Modem Cord Cross Tx Rx Line For Data Communication (5 Feet, Black)

DTECH
DT-9006B 1.5M
9.84 X 7.09 X 1.26 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
DTECH Co.,Ltd 9.89

Features

Simple Serial Null Modem extension cable (3 wire type and no hardware handshaking) extends a COM port connection between computer and some old device with RS-232 compatible

(Not VGA-CABLE) Wired as a 9 pin serial port Null-Modem cord that 2-3 line are crosslinked (only TX/RX data and signal ground wires connected); standard shielded rs232 extender cable with AL foil

DB9 male to female crossover adapter extender equipped with screws on each end to ensure an easy and solid connection for stable 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

5 feet short DE9 serial extender cord m/f for hooking up RS232C equipment like scanner, Modem, printer, plotter, camera, barcode / embroidery machine, touchscreen, microcontroller, factory test equipment

Top 10 modem cables Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Dtech 4
Tera Grand 2
Cablecreation 1

Top 10 modem cables Brands Pie Chart


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