Standard Patch Cable Wiring

The two wiring standards t568a and t568b vary only in the arrangement of the colored pairs.

Standard patch cable wiring.

A patch cable patch cord or patch lead is an electrical or optical cable used to connect patch in one electronic or optical device to another for signal routing. Therefore a 568b patch cable should work fine on a 568a cabling system and visa versa. Ethernet rj45 crossover cable wiring. The tia eia 568 a specifies two wiring standards for an 8 position modular connector such as rj45.

Patch cords are usually produced in many different colors so as to be easily distinguishable and are. Both ends use the same wiring standard. Category 5 cable cat 5 is a twisted pair cable for computer networks since 2001 the variant commonly in use is the category 5e specification cat 5e the cable standard provides performance of up to 100 mhz and is suitable for most varieties of ethernet over twisted pair up to 1000base t gigabit ethernet. So a patch cable is often called a straight through cable.

Hold the grouped and sorted wires together tightly between the thumb and the forefinger. Both the t 568a and the t 568b standard straight through cables are used most often as patch cords for your ethernet connections. For patch cables 568 b wiring is by far the most common wiring method. It is important to wire according to a standard to get proper performance from the ethernet cable.

So both side connector a and connector b of patch cable have wire arrangement with same patch cable colors as shown in the following picture. There is no difference in connectivity between 568b and 568a cables. Cables that are terminated with differing standards on each end will not function normally however mixing t568a terminated patch cords with t568b terminated horizontal cables or the reverse will not produce pinout problems in a facility although it may slightly degrade signal quality this effect is marginal and certainly no greater than. Cut all of the wires at a perfect 90 degree angle from the cable 1 2 inch from the end of the cable jacket.

Of course if you want to make a cross over cable then you can make the cable wiring to the different standard alignments at each plug ie. One end will have the t568b and the other the. If you require a cable to connect two ethernet devices directly together without a hub or when you connect two hubs together you will need to use a crossover cable instead. Bring all of the wires together as closely as possible.

Just for completeness i ll list out the cable colour order for the other ethernet cable plug standard t568a. Use the 568 b wiring scheme on both ends for a standard patch cable. Virtually all pre assembled patch cables are wired to the b standard. Devices of different types e g a switch connected to a computer or a switch to a router are connected with patch cords.