Copper cabling is the basis for DC power and data transmission in traditional network systems. Until now, copper cabling has been favored by network administrators because of the low cost of cabling (especially unshielded copper cabling), And its wiring method has also developed very mature.
In order to optimize the performance of the copper cabling system, the relevant organization has developed the ANSI / TIA-568-C standard to guide people in the deployment of communication facilities to ensure that the copper cabling system can adapt to voice communications, network communications, and other applications. This section describes in detail the ANSI / TIA-568-C standard for cable length and cable termination requirements.
The ANSI / TIA-568-C standard specifies the maximum distance for horizontal cabling and, in addition, provide for the deployment of copper, as follows:
Cylinders for horizontal cabling should not exceed 90 m. When selecting the length of the cabling cable, it is important to note that the cable is not connected directly from the patch panel to the wall outlet panel, but passes through walls, pipes, corners, etc.; Remember to set aside a certain length of copper wiring in the wiring frame, to prevent future distribution due to patch panels or other reasons lead to cable length is not enough. In fact, some professional copper deployment staff will be in the ceiling above the ceiling to reserve a few laps of copper, as shown below:
The ANSI / TIA-568-C standard sets two wireline standards for copper termination: T568-A and T568-B, both of which are not essentially different, but differ in color. In the copper cabling system, regardless of which line order standard, the system can work properly. It should be noted that these two standards cannot be mixed in a copper cabling system, that is, a copper cabling system can only choose to use a line order standard.
As shown in the following figure, RJ45 crystal head lead sequence number should be observed in accordance with the following method: the front of the RJ45 plug (with a copper needle side) toward their own, with a copper needle upward, connecting the cable to the bottom, from Left to right will be 8 copper needle followed by numbered 1 ~ 8. T568A standard line order is: green and white -1, green -2, orange white -3, blue -4, blue and white -5, orange -6, brown white -7, brown -8, T568B standard line order is: Orange-1, orange-2, green-white-3, blue-4, blue-white, green-6, brown-white.
Before starting the deployment of the copper cable, it should be planned, for example, where the number of copper cables, copper cable alignment need to use the trunking or J-type hook, the copper will be in the wet or chemical pollution in the environment To damage, etc., should pay attention to the protection of the deployment of copper.
When wiring is done horizontally, you can install troughs or J-hooks under the ceiling to manage the copper cable, which prevents the copper from being deployed in ceiling ceilings, power pipes or other pipelines, resulting in damaged or difficult to manage cables. In addition, you need to use patch panels, cable ties and other cable management tools to facilitate the construction of a neat and orderly, easy to manage and maintain the copper cabling system.
In the process of deploying copper, special attention should be paid to the following:
1. Do not unpack the twisted pair cable at any time, unless necessary;
2. Do not allow bridging;
3. Should be used with copper-compatible connector, patch panel, and wall socket panels;
4. If the copper cable is damaged, do not attempt to patch by way of splicing, you should immediately replace the new copper;
5. At the ends of the copper cable RJ45 crystal head, just remove the copper at both ends of a small part of the outer jacket (generally not more than 3 inches);
6. Do not directly on the ceiling of the ceiling, but to use the trunking, J-type hook and other cable management tools, cable to avoid hanging above other equipment;
7. If the wires that are being used in the copper cable do not transmit data properly, do not attempt to replace them with other unused wires. Replace the copper cable immediately. Otherwise, it will cause intermittent network problems and the system may need to use the copper All the wires.
8. Separate the voice cable and the data cable.
Copper cabling is a more complex task. Before starting deployment, the plan should be based on the specific environment and application to determine the number and length of copper to be used. The actual operation should also follow the ANSI / TIA-568-C standard.