This 48-inch cable from Digi International is a converter cable which converts the RJ-45 connector to a DB-25 Male connector. The RJ-45 connector is most often used to connect a system to a LAN, commonly an Ethernet system. By converting an RJ-45 connector to a DB-25 Male connector, you will be able to link a Linux PC to a LAN. This conversion offers other versatile networking solutions as well. Digi International is a leading provider of data communications hardware, so you can be sure youll receive the best quality cables and connectors when you by from Digi International.