Introduction
This manual provides instructions for the StarTech.com 1m Black Straight Through DB9 RS232 Serial Cable (Model: MXT1001MBK). This cable is designed to extend the connection between your DB9 serial devices by up to 1 meter, offering flexibility in device placement and ensuring reliable data transfer.
Product Overview
Features:
- DB9 Male to DB9 Female connectors
- 1 meter (3.3 ft) length
- Black color
- Extends serial device reach
- High-quality cable shielding for EMI interference prevention
- DB9 connectors with strain relief molding
What's in the Box:
- 1 x 1m Black Straight Through Serial Cable - DB9 M/F

A black 1-meter serial cable with a male DB9 connector on one end and a female DB9 connector on the other, designed for extending serial connections.
Setup and Installation
Connecting the Cable:
- Identify the DB9 serial port on your source device (e.g., computer, industrial equipment).
- Connect the male DB9 end of the StarTech.com serial extension cable to the female DB9 port on your source device.
- Identify the DB9 serial port on your peripheral device (e.g., modem, printer, network equipment).
- Connect the female DB9 end of the StarTech.com serial extension cable to the male DB9 port on your peripheral device.
- Ensure both connections are secure by tightening the thumbscrews on the DB9 connectors.

This image shows the male and female DB9 connectors, highlighting the thumbscrews for secure attachment. The male connector has pins, and the female connector has corresponding holes.
Product Overview Video
This video provides a visual overview of the StarTech.com 1m DB9 RS232 Serial Cable, demonstrating its features and connection process.
Operating Instructions
Once connected, the StarTech.com DB9 RS232 Serial Cable facilitates data transfer between your serial devices. No additional software or drivers are typically required for the cable itself, as it acts as a passive extension. Ensure that the devices connected are properly configured for serial communication according to their respective manuals.
Maintenance
To ensure optimal performance and longevity of your serial cable:
- Storage: Store the cable in a cool, dry place away from direct sunlight and extreme temperatures.
- Cleaning: Use a soft, dry cloth to clean the cable and connectors. Avoid using harsh chemicals or abrasive materials.
- Handling: Avoid bending or kinking the cable sharply. Do not pull on the cable itself to disconnect; always grasp the connector housing.
- Inspection: Periodically inspect the cable and connectors for any signs of damage, such as frayed insulation or bent pins.
Troubleshooting
If you experience issues with your serial connection, consider the following:
- No Connection: Ensure both ends of the cable are securely connected to their respective devices and the thumbscrews are tightened.
- Intermittent Connection: Check for any physical damage to the cable or connectors. Try using a different serial port on your devices if available.
- Data Transfer Errors: Verify that the serial communication settings (baud rate, data bits, parity, stop bits, flow control) on both connected devices match.
- Cable Length: While this cable extends by 1 meter, excessive total cable length in a serial chain can sometimes lead to signal degradation. If using multiple extensions, test with a shorter, direct connection if possible.
Specifications
| Attribute | Value |
|---|---|
| Brand | StarTech |
| Model Name | 1m Black Straight Through DB9 RS232 Serial Cable - M/F |
| Model Number | MXT1001MBK |
| Connector Type | Serial (DB9) |
| Connector Gender | Male-to-Female |
| Cable Type | Serial |
| Length | 1 meter (3.3 ft) |
| Color | Black |
| Item Weight | 0.08 Kilograms (2.85 ounces) |
| Product Dimensions | 39.4 x 1.3 x 0.6 inches |
| Outer Material | Polyvinyl Chloride (PVC) |
| Number of Pins | 9 |
| Compatible Devices | Serial devices |
| Special Feature | Data Transfer |
| Data Transfer Rate | 1 Gigabits Per Second (Note: Actual RS232 speeds are typically lower, up to 115.2 kbps or higher with specific hardware) |
| Indoor/Outdoor Usage | Indoor, Outdoor |
Safety Information
Please observe the following safety guidelines when handling and using the cable:
- Electrical Hazards: Do not use damaged or frayed cables. Exposed wires can lead to electric shock, short circuits, or fires. Ensure cables are properly insulated and connected.
- Trip Hazards: Route cables carefully to avoid creating trip hazards. Secure cables along walls or under desks where possible to prevent accidents.
- Cable Damage: Avoid pinching, pulling, or excessively bending cables. Damaged cables can expose wires, pose a risk of sparks, electrical shock, and device failure.
- Heat Buildup: Do not bundle cables too tightly, as this can lead to overheating and potential fire hazards. Ensure proper ventilation.

This image displays various safety warnings in multiple languages, including electrical hazards, trip hazards, cable damage, and heat buildup, relevant to the safe use of cables.
Warranty and Support
This StarTech.com product is backed by a Lifetime Warranty.
For technical support, product information, or warranty claims, please visit the official StarTech.com website or contact their customer service.
You can find more information and support resources at the StarTech.com Store on Amazon.







