The ComNetTM CNFE4SMS is a four-port switch with uplink management functionality and provides 4 Ethernet ports operating at 10/100 Mbps and is designed to combine three electrical ports into an electrical port that forwards this data to the next network device, There is no programming required to use this product. The ComNet CNFE4SMS comes pre-programmed, preventing network video flooding with DIP switch selection of port 4 as uplink or as an unmanaged switch. It is "Plug-and-Play". LED indicators confirm the operating status of this device. The ComNet CNFE4SMS may be either wall mounted, rack mounted ("ComFit" packaging) or DIN-rail mounted with the use of the ComNet DIN BKT1 adapter.