Build Your Complete System
Manufacturer-verified compatible cameras, recorders, mounts, accessories, and licenses for this product. Adjust quantities and add the entire bundle to your cart in one click.
No Bots, Just Experts
Questions about this product? Free pre-sales support from a senior specialist — product questions, compatibility checks, BOM quotes, price confirmation — typically answered within one business day. Need camera placement or system design work? Engineering time is $175 per hour (qty 1 = 1 hour). Hardware buyers get up to one hour ($175) credited back on their order.
StarTech NM9FF DB9 Female to Female Null Modem Adapter
Overview
The StarTech NM9FF is a passive adapter that converts a standard DB9 male serial port into a DB9 female port, effectively creating a null modem connection between two DTE devices. This is critical for direct serial communication between computers or between a computer and a serial peripheral that requires a crossover connection, such as older industrial equipment or specific network devices. Its compact form factor and white color make it suitable for clean installations where aesthetics matter, and the 2-inch length minimizes cable extension.
Compatibility
This adapter is compatible with any system requiring a DB9 female serial port for direct DTE-to-DTE communication. It functions as a passive adapter, so it does not require drivers and works with any operating system or hardware that supports RS-232 serial communication. It is commonly used to connect two computers directly for file transfer or remote control, or to interface with serial consoles on network switches, routers, and other IT infrastructure components. It's also used for connecting certain types of legacy industrial control systems or diagnostic equipment.
Installation Notes
No special installation is required beyond physically connecting the adapter between two serial cables. Ensure the connected devices are configured for serial communication and that the appropriate null modem configuration is established at the software level if direct PC-to-PC communication is intended. The adapter's small size and lightweight (1.1 oz) design mean it adds minimal strain to connected cables.
What's in the Box
- 1x NM9FF DB9 Female to Female Null Modem Adapter
StarTech This Null Modem Cable Adapter Features TWO DB9 - NM9FF
Build Your Complete System
Manufacturer-verified compatible cameras, recorders, mounts, accessories, and licenses for this product. Adjust quantities and add the entire bundle to your cart in one click.
Looking for more StarTech products? Shop the full StarTech catalog →
System Design, Deployment & Technical Support
Support services and planning resources for commercial surveillance, access control, and infrastructure deployments.
Fixed scope • Fixed price
System Design Assistance
- Get help validating product compatibility
- Coverage requirements
- Storage planning and deployment architecture before you buy.
Deployment & Configuration Support
- Access fixed-scope support for rollout planning
- User setup guidance
- Migration and system standardization across single-site or multi-site deployments
Guides, Tools & Calculators
- PoE requirements
- Storage retention
- Camera selection and deployment methodology