How to wire RJ45 plug for an IP CCTV Camera
When wiring up an IP camera, or any other IP device for that matter, you must use network cable such as CAT 5e or CAT6 containing 4 pairs of wires. Each pair consists of a solid coloured wire and a strip of the same colour on a white background. The plugs used for connecting network cables are called RJ45 plugs and RJ stands for “Registered Jack”.
There are two standard colour codes for RJ-45 wiring: T-568A and T-568B. Although there are 4 pairs of wires, 10BaseT/100BaseT Ethernet uses only 2 pairs: Orange and Green. The other two colours (blue and brown) may be used for PoE. The two wiring standards are used to create a cross-over cable (T-568A on one end, and T-568B on the other end), or a straight-through cable (T-568B or T-568A on both ends).
You would normally use a standard T-568B wiring for both ends of your CAT 5 or CAT6 cable when connecting equipment such as IP Cameras, Printers and Computers etc. to a Router or to an ethernet switch or hub. (you could use both T-568A instead but this is less common and not recommended).
Below is an image of RJ45 Plug Wiring:
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