VoIP telephone is the Ethernet power supply technology, is the power supply through the distance telephone recent switches or across the equipment into the network cable, switches, and across the equipment located in the wiring closet, usually powered support Ethernet switches, power consumption than does not support Ethernet switch power supply, a lot of extra power transmission through the network to telephone and other power equipment, but also has some power is consumed in wiring, across the equipment is used in the power supply, this paper will introduce VoIP implementation plan of the power and heat dissipation,
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