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 NM9MM DB9 RS232 Serial Null Modem Adapter - M/M
Overview
The StarTech NM9MM is a passive DB9 (9-pin) male-to-male null modem adapter. It facilitates direct serial communication between two DTE (Data Terminal Equipment) devices, such as connecting a computer to a console port on network equipment or interfacing with legacy industrial control systems. This adapter is essential for troubleshooting or configuring devices that rely on serial RS232 connections, bypassing the need for complex cabling or software emulation. Its compact, white form factor ensures it doesn't add significant bulk to your setup.
Compatibility
This adapter is compatible with any system or device featuring standard DB9 male or female serial ports that require a null modem configuration for direct DTE-to-DTE communication. This includes many industrial controllers, network switches, routers, servers, and older computing peripherals. It functions as a passive adapter, requiring no drivers or software, and is designed for direct serial data transfer.
Installation Notes
The NM9MM requires no external power or drivers. Simply connect the male DB9 connector of the adapter to a female DB9 port on one device and the other male DB9 connector to a female DB9 port on the second device. Ensure both devices are configured for serial communication and that a null modem connection is appropriate for their intended interaction. The adapter's small dimensions (2.0 in x 1.3 in x 0.6 in) allow for installation in tight spaces.
What's in the Box
- 1 - DB9 Male to DB9 Male Null Modem Adapter
StarTech DB9 RS232 Serial Null Modem Adapter - M/m - NM9MM
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