Serial null modem cable StarTech 10 ft (3 m) DB9 female to DB25 male, grey

The StarTech 10 ft (3 m) cross-wired serial null modem cable provides a DB9 female connector on one end and a DB25 male connector on the other, enabling direct serial communication between a 9-pin serial device and a 25-pin serial port or PC-to-PC file transfer via serial link. The grey cable is intended for use with legacy equipment and systems that require null-modem wiring and is CE and RoHS certified.

Advantages

This cross-wired null modem cable supports direct device-to-device serial communication without the need for a modem or additional adapters. The cable’s 3 m length offers flexibility for desktop and equipment connections while maintaining reliable signal transfer. It is built to industry standards and comes with the manufacturer’s lifetime warranty for long-term use.

Suitable for

• Connecting a 9-pin serial device to a 25-pin serial port
• PC-to-PC serial file transfers using null-modem wiring
• Legacy equipment, industrial controllers, and point-of-sale systems

Key specifications

• Connector A: DB9 female
• Connector B: DB25 male
• Cable type: Cross-wired (null modem)
• Length: 10 ft / 3 m
• Color: Grey
• Certifications: CE, RoHS
• Weight (approx.): 170 g

How to use

Connect the DB9 female end to the 9-pin serial device and the DB25 male end to the 25-pin serial port on the host device or computer. Configure serial communication settings (baud rate, parity, data bits, stop bits) on both devices so they match. For PC-to-PC transfers, establish a serial communication program or terminal session and initiate file transfer using the chosen protocol.

Usage recommendations

Use this cable where direct null-modem serial communication is required. Avoid sharp bends and keep the cable clear of sources of strong electromagnetic interference. Verify serial port settings on both devices before beginning data transfer.