The VP-14 is a port extender for RS-232 data signals. It sends data from any port to the other three.- Control - DIP-switches for straight (flat) or crossed connection.- Size - Compact TOOLS - 3 units can be rack mounted side-by-side in a 1U rack space with the optional RK-3T rack adapter. - compatible with RK-3T 19-inch rack adapter for mounting 3 Kramer TOOLS™ into a 1U rack space.Applications:- Controlling a single matrix switcher or other product via several computers and / or controllers.- Monitoring of several RS-232 controlled machines via one PC port.- Inter-communication between several serially controlled machines.