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What is pigtail and how to wire pigtail

2022-07-26
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Same as the optical jumper, when the connecting line is an optical cable (mostly indoor optical cable) and passes the standard test line, it is called an optical fiber pigtail. So, what is pigtail? How to wire pigtails?

 

What is pigtail

Pigtail, also known as pigtail, has only one end with a connector, and the other end is a broken end of a fiber optic cable core. It is connected to other fiber optic cable cores by fusion splicing. It often appears in fiber optic terminal boxes. (couplers, jumpers, etc. are also used between them.

 

How to wire pigtails

ODF racks should be distributed

It is often seen in the equipment room that some sections of the trunking are covered with pigtails and overlap each other, while there are few pigtails in other trunkings. The occurrence of this situation is not conducive to the safety of the transmission service, but also It is detrimental to the aesthetics of the computer room and causes a waste of resources. The main reason for this phenomenon is that the layout of the ODF rack in the equipment room is not reasonable, and a large number of devices that need to use optical fibers are concentrated in a certain direction of the ODF rack. In order to avoid such phenomena, it should be considered in the design and construction of the equipment room. The ODF rack can be set in the center of the equipment room, etc., so that the pigtail can reach any position in the equipment room, and the distribution of optical transmission equipment in the equipment room should be considered.

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Setting up the ODF patch panel

For the failure to make a reasonable layout during construction and design, or for some reason, there are inevitably a large number of equipment that requires huge optical fiber resources in a certain direction of the ODF rack, and the sub-ODF rack should be appropriately installed according to the situation. Replace a large number of optical fiber jumpers in the trunking with optical cables. The sub-ODF rack is installed near the equipment. When performing fiber jumper operations between the equipment in the cabinet and the ODF rack, first jump to the corresponding sub-ODF rack, and then jump from the sub-ODF rack to the equipment in the cabinet. However, it should be noted that this design will have a certain degree of light attenuation, and the loss added by the empirical value is less than 1dB.

 

Optical fiber routing channel

Due to the limited space resources of many computer rooms, only one cable routing channel is generally set in the computer room, and the pigtails and electrical signal cables are routed together. Because the pigtail is afraid of pressure and lacks a protective layer, if it is not protected by a casing, the pigtail will easily be damaged, threatening safe transmission. The wire duct is a waste of resources and is not conducive to the beauty of the computer room. If you can use a special optical cable routing channel. The protection of pigtails can be omitted, which not only saves resources but also is beneficial to the beautiful environment of the equipment room.

 

Selection of ODF racks

(1) There must be sufficient space for storing redundant pigtails.

 

(2) The flange interface of the ODF frame should be easy to maintain. If there is a problem with a flange interface, pull out a row where it is located and replace it. (The commonly used ODF frame is 12 flanges as a unit, and the maintenance of one core will affect the other 11 cores)

 

The above is all about what pigtails are and how they are wired. In fact, with the wide application and rapid development of optical transmission equipment, the usage of optical jumper frames (ODFs) and pigtails in the communication room has also increased dramatically. Increase.

 

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