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Many people do not quite understand the fiber-optic jumper network-level and fiber-optic jumper-level loss of telecommunications, in simple terms network level than the carrier-class slightly worse, simply said that attenuation is larger. Network-level jumpers generally require very low (lost packets on the transmission, the data are generally large and 0.2DB) carrier-class jumpers are relatively better than the network level, because of its small attenuation. Here we come to learn more about the difference between the optical fiber jumper level and network level.
Network-level jumper and carrier-class jumper approach, in fact, the network-level jumpers and carrier-class jumpers, the approach is the same, but the carrier-class jumper in the grinding more than a change process, network Jumper grinding 4 procedures. Carrier grade grinding 5 processes. First of all, let's take a look at the network-level fiber jumpers, network-level than the carrier-class slightly worse, simply said that attenuation is larger. Network-level jumpers generally require very low (lost packets on the transmission, the data are generally greater than 0.3DB).
Carrier-grade jumpers are relatively better than network-level jumpers because of their small attenuation. Not easy to lose data. Like China Mobile, China Unicom, China Telecom, their servers are all carrier-grade jumpers. If used in the video light above, it is recommended that you choose the carrier-class jumpers, video transmission is the most important. General carrier-class indicators: Insertion loss less than 0.3dB Return loss greater than 45dB.
Other construction factors and application environment caused by the loss
① non-standard optical cable on the rack caused by the loss. Strand loose loose structure of optical fiber cable easy to produce such losses, because one of the optical fiber shelves at the root of multiple loose tubes twist each other; the second is to use the cable tie loose tube loose tube to the connector box When the mouth, so loose tube appear sharp bend; The third is when the optical fiber shelves and optical fiber reinforced components up and down misalignment. These factors can cause increased losses.
② poor heat shrinkage caused by the loss of hot melt protection. The main reasons are: First, the quality of the hot-melt protection tube itself, after the hot-melt distortions, resulting in bubbles; the second is the welding machine heater heating, heating parameters set properly, resulting in deformation of hot melt protection tube or bubble ; Third, the heat shrinkable tube is not clean, dust or gravel, hot melt on the connection point of damage, causing loss increases.
③ buried optical cable does not regulate the construction of the loss. The reason is that one of them is that the depth of the optical cable is not enough and it is damaged after being crushed by the heavy objects; the other is that the optical cable is improperly routed, and the optical cable is subjected to the external force exceeding its allowable load range due to the change of the environment and the terrain; Uneven, cable appears arch, hanging phenomenon, there is residual stress backfill; The other is caused by other reasons, the outer sheath of fiber optic cable into the water damage, resulting in hydrogen loss
④ Overhead cable does not regulate the construction caused by the loss. The main reasons are as follows: First, in optical fiber cable laying construction, optical cables play a small circle, bending, twisting and playing back buckles, pulling when tugging, causing surge and the maximum moment of pulling force is too large; second, improper use of optical cable hooks, The card hanging in the direction of inconsistencies appear serpentine bend, the interval is too sparse, the cable due to excessive force and force; the third is the plate stay in the rod of the cable is not fixed firmly, the cable by long-term external forces and short-term impact and damage; the Fourth, the deployment of optical cable is too tight, did not consider the natural elongation of optical fiber cable; the other is caused by other reasons optical fiber outer sheath damage and water, resulting in hydrogen loss.
⑤ pipe cable does not regulate the construction of the loss. The reason is that one of them is that when the optical fiber cable is deployed by a net cover method, the control of the traction speed is not good, the optical cable is hit and dangled, and the surge occurs. The other one is that when the optical fiber cable is put on, there is no anti-plastic sub-pipe and the optical cable is scratched; Is caused by other reasons damaged fiber outer sheath water, resulting in hydrogen damage.
⑥ room, equipment, pigtails and fiber jumpers lashing, winding is not standardized, resulting in cross-winding and other phenomena caused by wear and tear. ⑦ poor quality optical connector box, connector box package, the installation is not standardized, due to external effects caused by damage to the connector box, resulting in water damage and hydrogen loss.
⑧ cable in the erection of the process of tensile deformation, the box connected to the folder too much pressure on the fiber optic cable, fiber-optic plate hot melt tube compression too tight, fiber-optic plate in the non-standard optical fiber winding caused by the loss.
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