A network cable

Two h3c S5500 switch with a network cable directly connected, can be used normally, but after the trunk, or the cable connection, but found that it does not pass.
This network cable, is made up of two network cable with connection point, add up about 20 meters, AT1000 measured, the rate is only 100M, and 1236 line to normal, 4578 line is used to make telephone lines.　　Trunk to line to have requirements, switch a 568A, a 568B, all to view the switch support is not supported. In addition, the rate of 2 pairs of lines is 100m,4 to the line rate is 1000M.

　　　　　

A network cable