A Null Modem Cable is an RS-232 connection that was commonly used in the past to transfer files between two computers located near each other. Before the introduction of USB Interfaces, the Null Modem Cable was the most popular means of transferring data between computers. The cable connects the serial ports of two devices and mimics the analogue modems and the public phone network by crossing the sending wire and the receiving wire. A parallel port cable is also available for faster transmission rates.
How does a Null Modem Cable work?
The Null Modem Cable works by crossing the sending and receiving wires of each device’s serial port, to create a direct communication link between the two devices. When two devices are connected using a Null Modem Cable and data is transmitted, the sending device sends data over the transmit line and then receives the same data through the receive line of the other device’s serial port. This bidirectional communication between the two devices allows the transfer of files and other data.
What is the usage of a Null Modem Cable?
A Null Modem Cable is mostly used for transferring data between two computers located in close proximity to each other. The cable is widely used in technical environments, such as laboratories, because it is cost-effective, reliable, and easy to use.
Conclusion
Null Modem Cable is an essential tool for anyone who needs to transfer data between two computers without the use of the internet. It is simple, easy to use, and widely available. With its use, you can send files and other data between two devices located in close proximity to each other.
FAQ
What is a Null Modem Cable used for?
A Null Modem Cable is used to transfer data between two computers located near each other.
What is the difference between a Null Modem Cable and a modem?
A modem converts digital information into analogue signals that can travel over telephone lines. A Null Modem Cable simulates the functionality of a modem by crossing the sending wire and the receiving wire of two devices connected through the cable.
Can a Null Modem Cable be used for longer distances?
No, it is not recommended as the signal may not be stable over long distances. For longer distances, it is better to use a longer and shielded serial cable.
Final Thoughts
If you are looking for an easy and cost-saver way to transfer data between two computers, a Null Modem Cable is a reliable choice. You can find it easily in tech stores or online, and it works great for short-distance file transfers.
