(1) The wiring standard of EIA/TIA specifies the wiring sequence of two twisted pairs, 568B and 568A.
(2) Standard 568B: white orange-1, orange -2, white green -3, blue -4, white blue -5, green -6, white brown -7 and brown -8.
(3) Standard 568A: white green-1, green -2, white orange -3, blue -4, white blue -5, orange -6, white brown -7 and brown -8.
Two. Classification of network cables
(1) network lines are divided into straight lines and intersecting lines.
Straight line: The line order at both ends is the same. From left to right, the order of lines is: white orange, orange, white green, blue, white blue, green, white brown and brown.
Cross line: the two ends of the network cable are not on the same road, one end is 568B and the other end is 568A. This practice is called crossing the line.
(2) Selection of straight lines and intersecting lines
The following is the correct choice of straight lines and crosshairs under various equipment connections. Where the hub represents the hub, the switch represents the switch, and the router represents the router:
PC-PC: cross line
PC hub: direct connection
Hub-Hub Common Port: Crosswire
Hub-Hub Level Connection-Level Connection: Crosswire
Hub-hub ordinary port-level connection: direct connection
Hub switch: Crosswire
Hub (Cascaded Port)-Switch: Direct Connection
Switch-Switch: Crosswire
Switch-router: direct connection
Router-Router: Crossing the Line