Which driver does the cable take? Prolific?

This cable with FTDI chip (FT232), the CD driver comes with the cable. And ,you can download the driver on FTDIchip Website too. (This one is another type DTECH USB to RS232 Cable which with Prolific chip: https://www.amazon.com/dp/B017CZ3FZ2 )

Will this work with a cisco switch?

Most Cisco switches use an RJ-45 jack for serial console connectivity, so you would need an adapter to use it. You'd be better off using something like this: https://www.amazon.com/Console-CableCreation-NETGEAR-TP-Link-Ubiquiti/dp/B0769J9QXP - however, if your Cisco switch has a DB-9 serial port, then this will work fine.

Is the dcd pin on db-9 connected to the ftdi chip? with respect to usb port, what is the direction of this signal?

Hi, the 10ft USB serial adapter's DCD pin is connected to FTDI chip. About the signal direction, would you mind contact us directly via the order page's "contact seller" button, so we can send you a picture with more details.

Which pins are rxd, txd, and gnd?

3 for rxd, 2 for txd and 5 for gnd With this in mind, you may consider using a NULL adapter (male/female) to change rxd and txd pins, and/or Gender adapter (male/male). I keep both of these adapters at hand, in case of a signal mis-match. This is a very good product. I've used it with and without the adapters, very successfully. I especially like the quality and length of the cord,10ft, braided.

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USB to RS232 Serial Adapter 3m DB9 Female Cable COM Port with FTDI Chipset Supports Windows 11 10 8 7 Mac Linux

USB to RS232 Serial Adapter 3m DB9 Female Cable COM Port with FTDI Chipset Supports Windows 11 10 8 7 Mac Linux

Product ID: 532489873

Details

Colour
blue
Compatible devices
Laptop
Connector type
USB to RS232
Item dimensions L x W x H
20.5 x 10 x
Specific uses for product
RS-232 serial

⚡USB-powered, no external adapter

💻FTDI chipset for cross-OS support

🔌USB Type-A to DB9 Female

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S$48

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Description

🔗 Bridge the gap between classic tech and modern workflows effortlessly!

EXTENDED REACH - 3-meter (10ft) cable length offers versatile device placement and workspace freedom.
COMPACT PORTABLE - Lightweight, USB-powered design eliminates bulky adapters—perfect for on-the-go pros.
PLUG PLAY SIMPLICITY - Instantly connect legacy serial devices to modern PCs without hassle.
RELIABLE DATA TRANSFER - Powered by the trusted FTDI FT232RL chipset ensuring stable, high-speed communication.
UNIVERSAL COMPATIBILITY - Seamlessly works with Windows 7-11, Mac OS 8+, and Linux for ultimate flexibility.

The DTech USB to RS232 Serial Adapter is a 3-meter USB Type-A to DB9 female cable featuring the reliable FTDI FT232RL chipset. It enables seamless connection of legacy serial devices to modern computers across Windows, Mac, and Linux platforms without needing external power. Designed for professionals who demand stable data transfer and flexible device placement, this adapter revives your classic COM port devices with plug-and-play ease.

Specifications

ASIN	B01GA0IZBO
Best Sellers Rank	42,938 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 116 in Serial Adapters
Brand Name	DTECH
Colour	blue
Compatible Devices	Laptop
Connector Type	USB to RS232 DB9 Female Serial Adapter
Country of Origin	China
Current Rating	150 Milliamps
Customer Reviews	4.6 4.6 out of 5 stars (217)
Input Voltage	5 Volts
Item Dimensions	20.5 x 10 x 5.1 centimetres
Item Weight	0.16 Kilograms
Manufacturer	DTECH
Model Number	DT-5031B
Number of Items	1
Number of Ports	2
Package Quantity	1
Power Plug Type	No Plug
Product Finish Type	Matte
Specific Uses For Product	RS-232 serial DB-9, data communication
UPC	600649504916 600649506088
Unit Count	1.0 count
Warranty Type	1 year warranty

Reviews

A**R

works great! sadly our company still uses equipment that isn't network compatible.

2.02.2026

A**E

20.12.2025

A**K

It works amazing. I love the product quality

3.11.2025

O**.

Worked without having to setup driver

15.03.2026

K**K

Great service and fast from Amazon! Exactly as described!

22.05.2022

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