The Kramer VS-4216 is a high-performance bi-directional matrix switcher for RS-422 control signals. It can connect multiple ports to create from one to eight bi-directional communication groups.
Kramer Electronics VS-4216 Features
Control - Front panel, RS-232 (K-Router Windows-based software is included) & RS-485
Memory Locations - Store multiple switches as presets to be recalled and executed when needed