The VK224 4-Port Serial Expansion Box provides four additional bi-directional RS-232 / 422 / 485 serial ports for a flexible expansion of the ATEN Control System. This allows users to control additional serial devices in an environment where more serial devices are required. With the advantage of an Ethernet based connection, the expansion box can be easily connected to the VK2100 Control Box via a LAN connection from a variety of locations across a network.