Carrier-grade loss of fiber patch cords
Many people do not understand the loss of fiber jumper network level and fiber jumper carrier level. Simply speaking, the network level is slightly worse than the carrier level. Simply speaking, the attenuation is larger. Network-level jumpers generally have very low requirements (packets will be lost during transmission, and data is generally larger than 0.2DB). Carrier-level jumpers are relatively much better than network-level jumpers because of their small attenuation. Let's take a closer look at the difference between carrier-grade and network-grade fiber optic patch cords.
The practice of network-grade jumper and carrier-grade jumper, in fact, the network-grade jumper and the carrier-grade jumper are the same in practice, but the carrier-grade jumper has a different process when grinding. Jumper grinding 4 processes. Carrier-grade grinding has 5 processes. First of all, let's take a look at the network-level fiber optic patch cords. The network-level fiber jumpers are slightly worse than the carrier-level ones. In short, the attenuation is larger. Network-level jumpers generally have very low requirements (packets will be lost during transmission, and data is generally greater than 0.3DB).
Carrier-grade jumpers are relatively better than network-grade jumpers because they have less attenuation. Not easy to lose data. Like China Mobile, China Unicom, and China Telecom, their servers all use carrier-grade jumpers. If it is used on the video optical transceiver, it is recommended that you choose the jumper of the telecom level, the video transmission is the most important. General carrier-grade indicators: insertion loss is less than 0.3dB and return loss is greater than 45dB.
Losses caused by other construction factors and application environment
①The loss caused by the installation of irregular optical cables. The layer-twisted loose-tube structure optical cable is prone to such losses, because one is that multiple loose tubes are twisted with each other at the upper shelf of the optical cable; When the port is opened, the loose tube will be bent sharply; the third is that the metal reinforcing member and the optical fiber loose tube will be dislocated up and down when the optical cable is put on the shelf. These factors cause increased losses.
② Loss caused by poor thermal shrinkage and thermal melt protection. The main reasons are: one is the quality problem of the hot-melt protection tube itself, distortion occurs after hot-melting, and bubbles are generated; the other is that when the heater of the welding machine is heated, the heating parameters are improperly set, resulting in the deformation of the hot-melt protection tube or the generation of bubbles ; The third is that the heat shrinkable tube is not clean, there is dust or gravel, and the connection point is damaged during hot melting, resulting in increased loss.
③ Loss caused by non-standard construction of direct buried optical cable. The reason is that one is that the optical cable is not buried deep enough and is damaged after being crushed by a load-bearing object; the other is that the optical cable is not properly routed, and the optical cable is subjected to external forces beyond its allowable load range due to changes in the environment and terrain; the third is the bottom of the optical cable trench. Uneven, the optical cable appears arched and hung, and there is residual stress after backfilling; the fourth is that the outer sheath of the optical cable is damaged by other reasons and water enters, resulting in hydrogen loss.
④The loss caused by the irregular construction of the overhead optical cable. The main reasons are as follows: one is that in the construction of optical cable laying, the optical cable is lapped, bent, twisted and buckled. When pulling, there is a surge, and the instantaneous maximum pulling force is too large; The direction of the hook is inconsistent, and there is a meandering bend, the interval is too sparse, and the optical cable is stressed due to excessive sag; the third is that the optical cable left on the rod is not fixed firmly, and the optical cable is damaged by long-term external force and short-term impact force; The fourth is that the fiber optic cable is too tight, and the natural elongation of the fiber optic cable is not considered; the fifth is that the outer sheath of the fiber optic cable is damaged by other reasons and water enters, resulting in hydrogen loss.
⑤The loss caused by the irregular construction of the pipeline optical cable. The reason is that, firstly, when the optical cable is deployed by the net sleeve method, the traction speed is not well controlled, and the optical cable is buckled and surged. It is due to other reasons that the outer sheath of the optical cable is damaged and water enters, resulting in hydrogen loss.
⑥The pigtails and optical fiber jumpers in the equipment room and equipment are not bundled and coiled irregularly, and the phenomenon of cross-winding will cause loss. ⑦The quality of the optical cable splice box is poor, the encapsulation and installation of the splice box are not standardized, the splice box is damaged due to external effects, etc., resulting in water ingress and hydrogen loss.
⑧The cable is stretched and deformed during the erection process, the pressure of clamping the optical cable in the splice box is too high, the hot-melt tube clamp in the fiber accommodating disk is too tight, and the optical fiber coiling in the fiber accommodating disk is not standardized.
The above is the difference between carrier-grade and network-grade fiber optic patch cords, and the loss of fiber-optic patch cords network-grade and carrier-grade fiber optic patch cords. ZR Cable focuses on the research and development and sales of optical communication products. If you have the needs of optical fiber products , may wish to consider the standard optical fiber brand ZR Cable.