Copper cables is the basis of DC power supply and data transmission in traditional network systems, until now, copper cabling has been widely favored by network administrators, which is because the cost of copper cabling is lower than that of optical cable (especially unshielded copper cabling), and its cabling method has also been developed very mature.
Copper cabling standards: In order to achieve the best performance of the copper cabling system, relevant organizations have formulated ANSI/TIA-568-C standard to guide people in the deployment of communication facilities to ensure that the copper cabling installation system can adapt to various applications such as voice communication as well as network communication and so on. This section will introduce in detail the relevant provisions of ANSI/TIA-568-C standard on cable length and cable termination:
1. Cable length
The ANSI/TIA-568-C standard specifies the maximum distance of horizontal cabling, in addition, it also makes relevant regulations for the deployment of copper cables, the details are as follows:
(1) The copper cable used for horizontal cabling should not exceed 90m;
(2) When choosing the length of the horizontal cabling cable, it must be noted that the cable is not directly connected from the patch panel to the wall socket panel, but will be routed through walls, pipes, corners, etc;
(3) Remember to reserve a certain length of copper cable on the patch panel to prevent the cable length from being insufficient due to the movement of the patch panel or other reasons. In fact, some professional copper cable deployment personnel will reserve several loops of copper cable on the ceiling above the rack.
2. Cable termination
The ANSI/TIA-568-C standard specifies two wire sequence standards for the copper cable termination : T568-A and T568-B, there is no essential difference between the two, just a difference in color. In the copper cabling system, no matter which wire sequence standard is adopted, the system can work normally. It should be noted that these two standards cannot be mixed in the same copper cabling system, that is, a copper cabling system can only choose to use one wire sequence standard.
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