The VTO2000A-C is connected with one network cable to the special DAHUA™ PoE switch (VTNS1060A) for the data signal and power supply. The DAHUA™ VTO2000A-B is connected to the VTO2000A-C and receives power from the switch via the VTO2000A-C. 24v Passive PoE (VTNS1060A switch).