Product information:

BetterBox Code Operated Switches give the user Computer-Controlled Switching for important remote and local operation. Available in 2, 4 or 8 Ports. Once connection is made with the desired port, all other ports ar locked out. DTE/DCE selection allows you to switch between Modems and Printers.One hardware Handshake in each direction give you added control. Data format of 5 to 8 bits and speeds of 75 bps to 76.8Kbps. RS-232 (V.24) interface. All connectors are DB-25. Front panel indicators.