Quick FactsA passive plug-and-play device for splitting serial ports.Connect two RS-232 devices or terminals to one modem without switching.Has two DB9 female host ports and one DB9 male modem port.Further DetailsPassive, port powered. No external power required.Can be used to combine two 9-pin DTE ports to one 9-pin DCE port.Great for either temporary or permanent installations.Simple setup. No configuration needed.