---
product_id: 436933
title: "StarTech.com 10' RS232 Serial Null Modem Cable - Null modem cable - DB-9 (F) to DB-9 (F) - 10 ft (SCNM9FF)"
brand: "startech.com"
price: "€ 8.94"
currency: EUR
in_stock: true
reviews_count: 13
category: "Star Tech.Com"
url: https://www.desertcart.ie/products/436933-startech-com-10-rs232-serial-null-modem-cable-null-modem
store_origin: IE
region: Ireland
---

# Supports reliable data transfer with 9-pin serial interface DB9 Female-to-Female cross-wired serial connection 10 ft length for flexible setups StarTech.com 10' RS232 Serial Null Modem Cable - Null modem cable - DB-9 (F) to DB-9 (F) - 10 ft (SCNM9FF)

**Brand:** startech.com
**Price:** € 8.94
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect the past with the future — serial style!

## Quick Answers

- **What is this?** StarTech.com 10' RS232 Serial Null Modem Cable - Null modem cable - DB-9 (F) to DB-9 (F) - 10 ft (SCNM9FF) by startech.com
- **How much does it cost?** € 8.94 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/436933-startech-com-10-rs232-serial-null-modem-cable-null-modem)

## Best For

- startech.com enthusiasts

## Why This Product

- Trusted startech.com brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Cross-Wired Precision:** Pins 2 & 3, 7 & 8 cross-wired for true null modem functionality
- • **Plug & Play Simplicity:** DB9 female-to-female connectors ensure seamless serial communication
- • **Future-Proof Your Setup:** Perfect for vintage devices, modems, and serial printers still in action
- • **Trusted StarTech Quality:** Top-rated cable with 4.7 stars from over 1,100 users
- • **Legacy Tech, Modern Flexibility:** 10-foot cable length lets you connect devices without compromise

## Overview

The StarTech.com 10' RS232 Serial Null Modem Cable (SCNM9FF) is a 10-foot, DB9 female-to-female serial cable designed for reliable data transfer between legacy devices. Featuring cross-wired pins for true null modem functionality, it supports seamless communication between serial ports, ideal for modems, serial printers, and other RS232-compatible hardware. With a strong 4.7-star rating and trusted StarTech.com build quality, this cable keeps your vintage tech connected in a modern workspace.

## Description

Connects 9 pin serial port to a serial printer

Review: Correct null modem cable, but not fully wired. - I bought this so one PC-based device could control another via serial port (yup, welcome to the 1990's!). It worked for this low-tech application. By my measurement here is the pin wiring. Pins 1, 5, and 9 are wired straight through. Pin 6 is open circuit. Pins 2 and 3 are cross-wired, as are pins 7 and 8. Who knows why the seller description blabs on and on about HDMI and display port. This cable has nothing to do with video!
Review: Cable worked fine. - Worked on an older device that I needed a longer cable for. Also purchased some gender changing adapters for the same device. All worked flawlessly.

## Features

- DB9 Female to DB9 Female

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00006B8BJ |
| Batteries | 1 A batteries required. |
| Best Sellers Rank | #1 in Modem Cables |
| Brand | StarTech.com |
| Cable Type | Serial |
| Color | Gray |
| Compatible Devices | Modem |
| Compatible Phone Models | No Compatible Phone Models |
| Connector Gender | Female-to-Female |
| Connector Type | Serial |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,135) |
| Date First Available | June 21, 2002 |
| Global Trade Identification Number | 00065030772303 |
| Indoor/Outdoor Usage | Indoor |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5.1 ounces |
| Item model number | SCNM9FF |
| Language | English |
| Manufacturer | StarTech.com |
| Model Name | Serial Null Modem Cable |
| Number of Items | 1 |
| Number of Pins | 9 |
| Product Dimensions | 120 x 0.01 x 0.01 inches |
| Recommended Uses For Product | signal transfer |
| Shape | Round |
| Special Feature | Data Transfer |
| UPC | 065030772303 |
| Unit Count | 10.0 Feet |
| Wattage | 50 watts |

## Product Details

- **Brand:** StarTech.com
- **Cable Type:** Serial
- **Compatible Devices:** Modem
- **Connector Type:** Serial
- **Special Feature:** Data Transfer

## Images

![StarTech.com 10' RS232 Serial Null Modem Cable - Null modem cable - DB-9 (F) to DB-9 (F) - 10 ft (SCNM9FF) - Image 1](https://m.media-amazon.com/images/I/71qp7FqV3NL.jpg)
![StarTech.com 10' RS232 Serial Null Modem Cable - Null modem cable - DB-9 (F) to DB-9 (F) - 10 ft (SCNM9FF) - Image 2](https://m.media-amazon.com/images/I/41I-ZFjAsSL.jpg)
![StarTech.com 10' RS232 Serial Null Modem Cable - Null modem cable - DB-9 (F) to DB-9 (F) - 10 ft (SCNM9FF) - Image 3](https://m.media-amazon.com/images/I/718ZSBF0bHL.jpg)

## Questions & Answers

**Q: Will this work with slc 500 processor?**
A: Any null modem cable with at least simple handshaking (TX/RX crossed) will work with the SLC 500 and ML1400 over DF-1 protocol.  Go shielded if you can.  (I'm an Industrial Electrician who's worked with both of these PLCs.)

**Q: Is this a crossover cable or straight thru?**
A: Your question is more inline with a Cat-5 cable, not a null modem cable.

**Q: Are the wires stranded or solid?**
A: The wires in SCNM9FF are stranded.
Matt, StarTech.com Support

**Q: You didn't answer the question on handshaking. Does it support full handshaking, partial handshaking, loopback handshaking or no hardware handshaking?**
A: We apologize if we missed part of a previous question. The SCNM9FF is a simple Null Modem cable with all 9-pins connected through the cable. While it doesn't actively participate in handshaking of any kind due to there not being a chip in the cable, as long as both of your devices support the same protocols there should be no problems using whatever hand-shaking you need.
Matt, StarTech.com Support

## Customer Reviews

### ⭐⭐⭐⭐⭐ Correct null modem cable, but not fully wired.
*by C***H on June 23, 2024*

I bought this so one PC-based device could control another via serial port (yup, welcome to the 1990's!). It worked for this low-tech application. By my measurement here is the pin wiring. Pins 1, 5, and 9 are wired straight through. Pin 6 is open circuit. Pins 2 and 3 are cross-wired, as are pins 7 and 8. Who knows why the seller description blabs on and on about HDMI and display port. This cable has nothing to do with video!

### ⭐⭐⭐⭐⭐ Cable worked fine.
*by J***R on September 7, 2025*

Worked on an older device that I needed a longer cable for. Also purchased some gender changing adapters for the same device. All worked flawlessly.

### ⭐⭐⭐⭐⭐ Great cable, saved my bacon!
*by R***S on March 3, 2025*

I used this in conjunction with Norton Commander for DOS to back up data from a vintage PC that didn't have a working disk drive. It worked great and got me out of a pinch!

## Frequently Bought Together

- StarTech.com 10' RS232 Serial Null Modem Cable - Null modem cable - DB-9 (F) to DB-9 (F) - 10 ft (SCNM9FF)
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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-13*