PoE (Power Over Ethernet) refers to some IP-based terminals (such as IP phones, WLAN access points APs, network cameras) without any changes to the existing Ethernet Cat.5 cabling infrastructure. While transmitting data, it can also provide DC power supply technology for such devices. PoE technology can ensure the normal operation of the existing network while ensuring the security of the existing structured cabling, and minimize the cost. Simply put, PoE (Power over Ethernet) is a kind of DC power provided by the network cable.
A complete PoE system includes two parts: a Power Sourcing Equipment (PSE) and a Powered Device (PD).
Power Supply Equipment (PSE): Ethernet switches, routers, hubs, or other network switching equipment that support POE functionality
Receiving device (PD): In the monitoring system, it is mainly the network camera (IPC).
So which network cable is most suitable for PoE power supply, the network cable must be connected to the network cable according to the standard of 568A or 568B, and 8 wires must be connected within 100 meters. The quality of the network cable is naturally better, and the transmission stability is higher. At least it is necessary to exceed Category 5 network cables. If the cost budget is high enough, Category6 network cables can be selected, the transmission distance is further, and the effect is better.
Category 6 cable: The transmission frequency of this type of cable is 1MHz ~ 250MHz. The Category 6 wiring system should have a large margin in the integrated attenuation crosstalk ratio (PS-ACR) at 200MHz, which provides twice the bandwidth of the Super Category 5. The transmission performance of Category 6 cabling is much higher than the Category 5 standard and is best suited for applications with transmission rates above 1Gbps. An important difference between Category 6 and Category 5 is that it improves performance in terms of crosstalk and return loss. For a new generation of full-duplex high-speed network applications, excellent return loss performance is extremely important. The basic link model is eliminated in the six categories of standards. The cabling standard adopts a star topology. The required cabling distance is: the length of the permanent link cannot exceed 90 m, and the channel length cannot exceed 100 m.
Super Category 5 Cable: Super Category 5 has low attenuation, low crosstalk, and higher attenuation and crosstalk ratio (ACR) and signal-to-noise ratio (Structural Return Loss), smaller delay error, and greatly improved performance. The Super Category 5 cable is mainly used for Gigabit Ethernet (1000 Mbps).
