Standards for terminating of RJ45 connectors.
When network devices have being connected some cables are used terminated by RJ 45 connectors. All cables used in building of Structured Cabling Systems no matter of construction or category have four twisted pair colored in different way.
1 pair white/blue-blue;
2 pair white/orange-orange;
3 pair white/green-green;
4 pair white/brown-brown;
So to connect two network devices by cable first it have to be terminated in both ends by RJ45 connectors. There are two types of connectors – Male RJ45 connector(plug) and Female RJ45 socket(jack):
Male RJ45 connector Female RJ45 socket
Male RJ45 connectors most recently are used in patch cables and Female RJ45 sockets are used in telecommunication outlets and in patch panels. According to Structured Cabling standards EIA/TIA 568, ISO/IEC 11801 or EN 50173 both ends of the cabling must be terminated on the same pins. To this end, the pairs, pins and their colours are standardised. There are two permitted versions: EIA/TIA 568A and EIA/TIA 568B, these are only different in the pair termination layout. (green and orange [Pairs 2 and 3] being reversed).
STANDARD 568A
STANDARD 568B
