How to choose the right cable in the wiring of the equipment room?


According to the provisions of TIA 942-2005, the following transmission grade cabling products can be used in the computer room:

Cat6 horizontal twisted pair; Cat 6A, Cat7 copper cabling system, OM1 multimode fiber (62.5/125 micron) and OM2 multimode fiber (50/125 micron), OM3 10G multimode fiber (50/125 micron) ), OM4 10 Gigabit multimode fiber (50/125 microns), single mode fiber. Therefore, it is recommended to use Category 6 or higher cables for copper cables in the general equipment room. It is recommended to use Category 6A cables if conditions permit. The optical cable is recommended to use OM3 10 Gigabit multimode fiber.


As the basic platform of the computer network system, the integrated wiring system needs to balance the cost of the application system, that is, the transmission protocol of the computer network needs to be considered. Looking at the IEEE 802 series of standards, we can see that the main computer network protocols currently in use are:


Copper cable system: Fast Ethernet, Gigabit Ethernet, 10 Gigabit Ethernet to be used;

Optical cable system: 100 Gigabit Ethernet, Gigabit Ethernet, 10 Gigabit Ethernet, upcoming 40 Gigabit Ethernet and 100 Gigabit Ethernet.


Room wiring

It can be seen that various network protocols have very different requirements on the transmission bandwidth of integrated wiring. If a single bandwidth product is used, the network product will be limited to a small selection range. To this end, the following recommendations are made:


①Copper system:

Category 6 is the main category, and Category 6A or Category 7 twisted-pair cables (shielded or unshielded) can be properly considered in the HAD area. On the premise of ensuring Gigabit Ethernet transmission, there is room for 10 Gigabit Ethernet. For the EDA area, because the twisted-pair cable is nearby and can be replaced at any time, it can still be mainly Category 6 at present, and if necessary, it can be replaced with Category 6A or Category 7 with network equipment.

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② Optical cable system:

Due to the difficulty of construction, whether it is the MDA area, the HDA area or the EDA area, the OM3 optical cable (10 Gigabit multi-mode optical cable) and the OS1 optical cable (single-mode optical cable) are laid at the same time. A product line of different types of cores, so this design has no impact on engineering. The advantage is that all kinds of fiber optic modules can be allowed to access the system.


The purpose of this consideration is: when the transmission traffic requirements are not high, cheap network equipment can be installed, and when the transmission traffic in any area increases in the future, high-end network equipment can be installed at any time, and cheap network equipment can still be used. Move to another area to continue using it. Since network equipment is rapidly updated, it is possible to add the most suitable network equipment according to needs without wasting existing equipment.


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