Power over HDBaseT (PoH) enables the transmission of DC power in conjunction with data signals over a single Ethernet cable to a distance of up to 100 meters/328 feet. The PoH standard is based on the IEEE 802.3at standard (Power of Ethernet – PoE), with the appropriate modifications to enable safe delivery of up to 100 watts (W) over the four-pairs of the Ethernet cable, as necessary.
In a typical PoH implementation, the power source equipment (PSE) is installed and powered by a 50- to 57-volt DC power supply, and all powered devices (PDs) then receive power directly over the HDBaseT link across all four pairs of LAN cables. Four-pair powering is the key to delivering more power with greater efficiency. Defined in the latest high-power PoE standards, four-pair powering gives PDs two power interfaces so they can receive twice the power of earlier two-pair solutions by using all four pairs of Ethernet cable.
For more information, please refer to the Introduction to Power over HDBaseT white paper.