SC10E4IG-L Series Device servers can conveniently and transparently connect up to four Serial ports to an Ethernet network. Data transmission between the Serial and Ethernet interfaces is bi- directional. You can both centralize the management of your Serial devices, and distribute management hosts over the network. Each Serial port can operate independently to provide maximum versatility. For example, port 1 can operate in Driver mode, port 2 in TCP Server mode, and ports 3 and 4 in TCP Client mode etc.