Surveillance systems monitoring large spaces such as warehouses, parks, gardens, and outdoor parking lots feature camera locations that are dispersed and far from the control center at distances usually longer than 100 meters. The conventional approach is to add repeater devices to extend the transmission range. However, this increases equipment and installation costs as a power supply and junction box are required to install the repeater. It also makes the system harder to maintain and increases the risk of product failure.

The Dahua ePoE IP system offers a very simple and effective solution. Dahua ePoE supports transmission of both power and video, audio, and control signals over up to 800 meters via traditional Cat5 Ethernet cable. It greatly simplifies network construction as only one cable is required to connect from the front-end to the back-end devices, which results in higher reliability and lower installation and maintenance costs for the whole system.