![DB9 Male to female serial cable file transfer gold plated best and quick transfer null modem cable](https://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)
A Null Modem cable is a type of serial cable used to establish direct communication between two devices, such as a computer and a modem, scanner, or printer. The cable connects RS-232 serial ports and is configured differently from a standard serial cable, allowing for communication without the use of a modem.
The male-to-female configuration refers to the gender of the connectors on each end of the cable, with male connectors on one end and female connectors on the other. This type of cable is often referred to as a "crossover" cable and is used for various purposes, such as file transfers, remote terminal access, and firmware upgrades. It is important to note that null modem cables are usually shorter in length than standard serial cables.