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As the name implies, the serial to usb adapter is an attachment used to convert a serial port into a USB port. Manufacturers include FTDI, Prolific, and PL2303. These are very popular among users who are looking for alternatives to parallel ports on their computers. A serial port can be found on many early models of computer, as well as proprietary hardware like printers, routers, and security systems. It was once widely used in both home-based and office-based computers before it was replaced by USB technology. Uses include connecting peripherals such as printers, scanners, and barcode readers that have a serial port. They are also used in embedded computers to connect simple or proprietary hardware. There are a number of reasons why some people may prefer a serial to usb adapter over a USB product. The most common is that they generally aren’t too expensive. This is often appealing to users who don’t want to spend money on an expensive piece of hardware when there may be an alternative available for less money. Another reason is compatibility. Some users find it necessary or beneficial to use software or hardware that was made for serial ports over USB ones. This is often true for software that needs to communicate with external hardware and can’t be used on a USB port. If an older model of computer has a serial port, there may be no way of using a USB adapter. Dependant upon the make and model, certain adapters may work with specific software, particularly those that use serial ports as their only connection. The serial to usb adapter can also be used as a means to access files or equipment that are located on a network that only uses the serial protocol. This is good for users who need a dedicated connection on a non-wired system and don’t mind having to use software on their systems. Serial to usb adapters are also handy for users who want to use their devices with software on their computer that doesn’t support USB. Using the adapter allows them to access their work on another system, while still keeping their data safely stored on the computer they are on. Many serial connectors come in different types of configurations. The most common is that of a DB9 connector, which uses 9 pins arranged in 3 rows and 3 columns. It is found on most printers, scanners, and barcode readers. This is also commonly referred to as a 9-pin serial connector or 9 pin DE9 connector because of its physical shape. The "DE" stands for D-sub. The other common configuration is that of a 9-pin RS-232 (EIA/TIA-232) connector, which uses 9 pins in the same arrangement in rows and columns. It is commonly used on printers, network connectors, and USB to serial adapters. Some serial adapters use an unusual interface type (sometimes referred to as PS2), which allows them to be used on computer systems which do not support USB ports. The PS2 interface uses the same 5 pins found on most standard PS/2 keyboards, but in a different arrangement in rows and columns. cfa1e77820
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