The difference between ordinary patch cords and cross-connect cords is compared. Ordinary jumper (straight-through cable): used to connect different devices, such as the connection between the computer network card and the module, the connection between the patch panel and the wiring room, and the connection between the patch panel and the HUB or switch. The RJ45 connectors at both ends of the straight-through cable are wired in the same way, using the T568B standard line sequence.

Crossover cable (crossover cable): used to connect the same device, such as the connection between the HUB and the switch and other devices. The RJ45 wiring methods at both ends are different. The T568B standard and the T568A standard are used respectively. One of the wirings is required to switch 1/3 and 2/6 pairs, and the remaining pairs can still be installed in a one-to-one correspondence.

In the integrated wiring (online) intelligent management system, a marking jumper is also used, which is actually a composite jumper or a multi-functional jumper. This wire is composed of copper wire or optical fiber, which is used to connect the corresponding detection equipment to real-time detection and management of the wiring system.