NC-AD300E Manual- 11 -E1 line interface of RJ45 as shown:E1 line ,usually config RJ45 transfer line BNC,if the opposite end of the side is RJ45.Youcan DIY it according the fllowing diagram:3.1.4 Enviromenta) Power Requirements:Voltage should be constant, the electric current should be sufficient (to meet the nees OK),Power can’t have too much clutter and interference.