The TP-MS3xx series of rack mount mid span POE power sources are used for supplying POE and data to multiple devices from a central location such as an operations room. The POE devices feature a separate data-in port coupled with a data out/POE port. The POE function is fully IEEE802.3af compliant.The included PC software allows for configuration of the individual ports and for displaying port status. Connecting to a PC is easy with the included RS232 cable. Ports can be configured for forced POE output (Passive POE) or IEE802.3af detection. POE DC Voltage (48V) is supplied on pins 4,5 (V+) and 7,8 (V-). Maximum power output per rack mount unit is 400W. The individual outputs are overload and short circuit protected.