How to design the cable for the integrated wiring system of the computer room?

According to TIA 942-2005, the following transmission grade cabling products can be used in the equipment room: Cat6 horizontal twisted pair; Cat 6A, Cat7 copper cabling system, OM1 multimode fiber (62.5/125 micron) and OM2 Mode fiber (50/125 micron), OM3 10 Gigabit multimode fiber (50/125 micron), OM4 10 Gigabit multimode fiber (50/125 micron), single mode fiber.

Therefore, it is recommended to use cables of Category 6 or higher in general computer room wiring copper cables. It is recommended to consider Cat6A cable. The optical cable is recommended to use OM3 10G 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, the main computer network protocols currently in use are:

Copper cable system: 100M Ethernet, Gigabit Ethernet, 10 Gigabit Ethernet to be used;

Cable system: 100M Ethernet, Gigabit Ethernet, 10 Gigabit Ethernet, upcoming 40 Gigabit Ethernet and 100 Gigabit Ethernet.

It can be seen that the requirements of the various network protocols for the transmission bandwidth of the integrated wiring are very different. If a single bandwidth product is used, the network product will be limited to a small selection range.

To this end, make the following recommendations:

1, copper cable system

In the six categories, the Category 6A or Category 7 twisted pair (shielded or unshielded) can be properly considered in the HAD area, leaving room for 10 Gigabit Ethernet under the premise of ensuring Gigabit Ethernet transmission.

For the EDA area, since the twisted pair is nearby and can be replaced at any time, it is still possible to use 6 types at present, and if necessary, replace the network equipment with Category 6A or Category 7.

2, cable system

Due to the difficulty of construction, whether it is MDA area, HDA area or EDA area, OM3 optical cable (10 Gigabit multimode optical cable) and OS1 optical cable (single mode optical cable) are laid at the same time, because the optical cable product has the same jacket. Different types of core products, so this design will not affect the project. The advantage is that various fiber optic modules can be allowed to access the system.

The purpose of this consideration is: when the transmission traffic demand is not high, you can install cheap network equipment, and in the future, no matter which area of ​​the transmission traffic increases, you can install high-end network equipment at any time, and cheap network equipment can still Move to another area to continue using. Since the network equipment is updated quickly, it is considered that the most suitable network equipment can be added according to requirements without wasting the existing equipment.

In addition, in the single-mode optical cable, it is worth considering the single-mode zero-water peak cable.

According to the ITU-T G.652 standard (single mode fiber standard), G.652A and G.652B are single mode fibers, and G.652C and G.652D are single mode zero water peak fibers, of which G.652D can be very good. Support for future 40 Gigabit Ethernet and 100 Gigabit Ethernet needs.

With the development of optical fiber production technology, many foreign optical fiber production plants are no longer producing low-end single-mode optical fibers, only single-mode zero-water peak optical fibers (grade G.652D), and domestic optical fiber factories already have single-mode zeros. The product line of Shuifeng Fiber.

In order to ensure that the integrated cabling system can still meet the upgrading of network equipment in the future, it is necessary to partially adopt single-mode zero-water peak fiber in the MDA area and the HDA area.