Astrotek 3m Serial RS232 Null Modem Cable DB9 Female
Astrotek 3m Serial RS232 Null Modem Cable DB9 Female
SKU:CBAT-DB9NULL-FF-3
The Astrotek AT-DB9NULL-FF-3 is a 3-metre serial null modem cable with DB9 female connectors designed for direct device-to-device data transfer. Featuring fully molded connectors, shielded construction, and a null-modem wiring scheme, it delivers reliable legacy device communication for IT technicians and system integrators.
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Product Information
| Brand | Astrotek |
|---|---|
| Category | Cables |
| SKU | CBAT-DB9NULL-FF-3 |
| Availability | In Stock |
Overview
- The Astrotek 3m Serial RS232 Null Modem Cable is a specialist connectivity solution for legacy device integration. With DB9 female connectors on both ends and a null-modem wiring configuration, it enables direct communication between two Data Terminal Equipment (DTE) devices without requiring a modem or additional networking equipment.
Fully molded connectors and shielded cable construction ensure reliable data transfer and durability in professional environments. The null-modem wiring scheme crosses transmit and receive lines, allowing devices that would normally require a DCE (modem) to communicate directly with each other.
This cable is commonly used for firmware updates on satellite receivers (Dreambox, Technomate, Humax, EchoStar, Manhattan) and legacy system maintenance where modern networking is not available. The 3-metre length provides flexibility for installation without compromising signal integrity.
Specifications
| Brand | Astrotek |
|---|---|
| Model | AT-DB9NULL-FF-3 |
| Product Type | Serial RS232 Null Modem Cable |
| Cable Length | 3 metres |
| Connector Type | DB9 Female to DB9 Female |
| Connector Configuration | Null-modem wiring (crossed) |
| Cable Construction | Shielded |
| Conductor | 30AWG Copper |
| Colour | Black |
| Connector Design | Fully molded with thumb screws |
| Compliance | RoHS |
| Warranty | 12 months |
Key Features
Ideal For
FAQs
What is a null-modem cable and why do I need it?
A null-modem cable connects two DTE (Data Terminal Equipment) devices directly without requiring a modem or DCE (Data Communications Equipment). It crosses the transmit and receive lines internally, allowing legacy computers, terminals, and peripherals to communicate with each other. It is essential for older systems that lack modern networking capabilities.
Can this cable be used for satellite receiver updates?
Yes. This cable is commonly used to update firmware on satellite and cable receivers including Dreambox, Technomate, Humax, EchoStar, and Manhattan models. Always consult your receiver's documentation to confirm this is the correct cable for your specific model.
What is the difference between DB9 female and DB9 male connectors?
DB9 female connectors have holes that receive pins, while DB9 male connectors have protruding pins. This cable has female connectors on both ends, making it suitable for connecting two devices that have male DB9 ports, or using gender changers if needed.
Is this cable suitable for modern computers?
Modern computers rarely have serial DB9 ports as they have been replaced by USB and Ethernet. This cable is designed for legacy systems and older equipment. If your device has a USB port, you may require a USB-to-serial adapter instead.
What does 'fully molded' mean and why does it matter?
Fully molded connectors have the connector housing permanently fused to the cable, eliminating weak solder joints. This design provides greater durability, improved shielding, and longer service life compared to non-molded alternatives. Thumb screws allow secure, tool-free connection.
Why is the cable shielded?
Shielded cable reduces electromagnetic interference (EMI) and provides cleaner data transmission, especially important for legacy serial communications over longer distances. This ensures reliable data transfer without corruption or signal loss.
What is the warranty coverage?
The Astrotek AT-DB9NULL-FF-3 includes a 12-month manufacturer's warranty covering defects in materials and workmanship.
