. Left unit compensates for 80 km distance 45060156 :)Part Number( رقم القطعة . Manufacturer Name: Accelink . Supported Fiber Type: 652.G, which is the standard for Single Mode Fiber. . Estimated Compensation Distance: 80KM . Dispersion value is 97.5 ps/nm at a standard wavelength of 1545 nm, which is the negative value needed to cancel the positive dispersion accumulated across the cable. 💥2. Right unit compensates for 120 km distance 45060156 :)Part Number( رقم القطعة Shares the same basic chassis design number for the dual chassis). Accelink :Manufacturer Name Supported Fiber Type: 652.G. . Estimated Compensation Distance: 120KM. . Dispersion value is -1457 ps/nm at a wavelength of 1545 nm; as the distance is longer, it requires a higher negative compensation value. . Maximum Insertion Loss dB (Max IL 5.9), The loss increases slightly here because the internal fiber used for compensation is longer. 💥Working Mechanism and Components of These Units . Device Nature: These devices are passive, meaning they do not require electrical power to operate. They rely entirely on special optical fibers with high negative dispersion (DCF) integrated within the unit. FiberMall + 1 . Ports and Connection: Each unit has an input (IN) port and an output (OUT) port and comes with protected blue connectors, usually SC/UPC or LC/UPC, to connect directly to the optical line. . Network Deployment: These units are widely used in high-speed transmission systems such as 10Gbps and above in DWDM/WDM networks. They are typically placed between optical amplifiers (EDAs) to compensate for the insertion loss they cause.