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StarTech.com 1 Port USB to Null Modem RS232 DB9 Serial DCE Adapter Cable with FTDI, Black (ICUSB232FTN )

4.5 out of 5 stars 152 customer reviews
| 36 answered questions
Was: $20.98
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Null Modem
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  • USB to Null Modem serial adapter corrects DTE/DCE conflicts without requiring additional adapters or cables
  • The FTDI chipset is highly customizable and broadly compatible, making it the ideal solution for any setup
  • Portable USB-Powered design requires no bulky power adapter or outlet
  • USB to Null Modem (Cross-Wired) RS232 Serial Adapter
  • Integrated FTDI USB UART Chip
  • Baud Rate up to 921.6Kbps
  • COM Port assignments maintained across reboot
  • USB-powered - no external power adapter required
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Frequently Bought Together

  • StarTech.com 1 Port USB to Null Modem RS232 DB9 Serial DCE Adapter Cable with FTDI, Black (ICUSB232FTN )
  • +
  • Bargain Cable DB9 Female / DB9 Female Null Modem Mini Adapter
  • +
  • TRENDnet USB to Serial Converter, USB 1.1 to RS-232 Male (9-pin) DB9 Serial Cable, Prolific Chipset, Windows 10/8.1/8/7, Mac OS X 10.6 and Above, 26 inch length, TU-S9
Total price: $33.43
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This item StarTech.com 1 Port USB to Null Modem RS232 DB9 Serial DCE Adapter Cable with FTDI, Black (ICUSB232FTN )
Customer Rating 4 out of 5 stars (152) 4 out of 5 stars (1798) 3 out of 5 stars (15) 4 out of 5 stars (476)
Price $18.49 $9.99 $14.49 $9.99
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Amazon.com Amazon.com DTECH Co.,Ltd Store4PC
Item Dimensions 8.27 x 5.71 x 1.57 in 7 x 9 x 2 in 5.1 x 9 x 1.8 in 5.1 x 7.3 x 0.9 in
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Product Description

Style:Null Modem

StarTech Accessory ICUSB232FTN 1Port USB to Null Modem RS232 DB9 Serial DCE Adapter Retail

Product Information

Style:Null Modem

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Warranty & Support

Warranty, Parts:Manufacturers Limited Warranty:2 YearAmazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
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Customer Reviews

Top Customer Reviews

2.0 out of 5 starsNot Full Null Modem
By The Walsh's on August 23, 2012
Style Name: Null Modem Verified Purchase
This cable does not implement the full "null modem" specification. Specifically Pin 1 (CD) is not tied to Pin 6 (DSR).
The cable worked flawlessly with programs that do not use (or can be set to ignore) Pin 1.
However Microsoft Activesync and Windows Mobile Device Center do not fit into this category and would not work.

Technical support was very responsive but unable to resolve this major issue.
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5.0 out of 5 starsI used this to connect to the serial console on ...
By Randall D. Watson on September 9, 2014
Style Name: Null Modem Verified Purchase
I used this to connect to the serial console on a NetGate pfSense appliance. Should I ever accidentally lock myself out of the web administration GUI this is the only way to access it. Connected via PuTTY in a Windows 7 virtual machine in VMware Fusion on a late-2013 MacBook Pro. If it works with that setup it will likely work with anything.
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5.0 out of 5 starsConvenice When You Always Need a Null Modem
By David on February 3, 2013
Style Name: Null Modem Verified Purchase
This is a great cable for prototyping if your board doesn't support a TTL connection. Being able to monitor if RX and TX are both working is very useful. If you always need a null modem for your designs because that is the way the plug is wired, this saves you the annoyance of needing an extra adapter. Especially nice if you have to travel often with cables as I do.
However, if your board/device does not have a crossover you should look for a cable without a null modem built in so you don't need a null modem adapter to "cross back" to get a direct connection.
Most importantly, this uses the rock solid FTDI FT232R chip which in my experience is by far the most reliable in terms of the chip itself and drivers for modern Windows(Vista+) versions vs the common Prolific and ATEN chip-sets found in most other cables like this.
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5.0 out of 5 starsWorks well with Windows 7 and Virtual Box
By Jeff Siegel on December 16, 2012
Style Name: 921.6 Kbps Baud Rate Verified Purchase
I used this serial adapter to support legacy systems. It works well under both Windows 7 and Virtual Box software. I often use Windows XP in a Virtual Box virtual machine (VM). You can attach this USB device to the VM. This allows me to run legacy software that will only work with XP and use a serial port.
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5.0 out of 5 starsExcellent!
By Mark Steven Kowalski on November 19, 2009
Style Name: 921.6 Kbps Baud Rate Verified Purchase
Although the printed manual does not specify, there is a driver for Vista. Didn't see any for W7.

But, the Vista install went fast and perfectly. When I connected the cable to a usb port, it turned up as COM3.

This product is perfect for my high-end laptop because it does not have a DB9 serial port. But, my hobbies and my job require that I be able to connect to a serial device using DB9 connectors.

Double-click my heels!
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5.0 out of 5 starsFantastic
By RFinCC on May 26, 2012
Style Name: 921.6 Kbps Baud Rate Verified Purchase
With my new motherboard I no longer had any com ports and only USB ports. Bought the ICUSB232Pro from [...] and this USB to RS232 Serial Adapter Cable did the trick and ended all my problems. Works great in both Windows 7 Home Premium and Professional in 32 and 64 bit. Comes with drivers or just go to their web site and download their latest.
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1.0 out of 5 starsDisappointing, frustrating and waist of time & money
By R. Smith on August 4, 2016
Style Name: Transparent Blue Connectors Verified Purchase
For the most part, I have been pleased with the StarTech products I have purchase. However, I continue to fight this device and it's functionality in Windows 10. With the Prolific drivers I have been able to get this working and identify the chipset as PL-2303 RA which is listed as supported on WIndows 10. Currently it is hit or miss, as to if the connected USB is correctly identified and linked to the device/driver instance. At this point, I can't tell if it's poor drivers or a counterfeit chip. Very disappointing and a frustrating waist of time and money!

I have a similar product (Null Modem USB to Serial) from StartTech with a FTDI chipset.. It has worked flawlessly. I will be investigating a standard USB to Serial adapter utilizing the FTDI chipset in hopes of having a stable product when needed.
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5.0 out of 5 starsA Well made cable
By Jimmy Blue on March 26, 2014
Style Name: Null Modem Verified Purchase
I needed this cable to run a virtual screen for my new Uniden scanner that has a major bug in the front usb port, By using this cable on the rear GPS port, i was able to run my virtual screen with no problems at all.
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