Assuming there is an Internet cafes from the operator (such as telecommunications) where the rent 10M bandwidth, then they will pull the cable from the telecommunications room to your Internet cafes, and then connected to the XFP transceiver, the other end of the transceiver cable, respectively Access to the data room and your Internet cafes switches or routers, and you can then switch through the switch network cable to the various machines. That is a long extension of the network cable equipment, the general single-mode 20KM, 25KM, 40KM, 60KM above is generally not a lot of long-distance demand is generally not a lot. Now more popular with the more popular is 10 / 100M, 1000M also have, but the use of the occasion is not a lot. Multi-mode is now basically rarely used, and now the cost of single-mode cable and multi-mode than the expensive, and multi-mode general distance of 2 km or less. Transceiver also sub-power built-in, external, optical sub-single, double fiber, as well as centralized and single-type, in short, according to customer needs and occasions to choose. Now the product quality on the market varies greatly, very confusing.
The XFP transceiver is an Ethernet transmission media conversion unit that switches short-range twisted-pair electrical signals and long-distance optical signals, and is known in many places as photoelectric converters. The product is generally used in the actual network environment where the Ethernet cable can not be covered and must be used to extend the transmission distance, and is usually located in the access layer application of the optical fiber broadband metro network; while helping to connect the last mile of the fiber to the city The network and the outer network also played a huge role.