Does single-mode fiber need to be multiplied by the core count

Under normal circumstances, the number of cores is equal to the number of terminals. However, we need to consider the redundancy during the design and construction of the actual scheme. So each terminal will use two cores at most. If you want to consider the cost, you can use 1-2 cores for the entire line redundancy. For example, if you have three. First, clearly understand the number of wiring points and calculate the number of switches. Whether the connections between switches are stacked is also one of the considerations. Stacking: If the core switch is dual-machine hot standby (both are working at the same time) for redundancy, 6 cores are sufficient (2 cores each use 2 cores, and 2 cores. A multi-mode optical core can transmit multiple channels of data at the same time, while single-mode can only transmit one channel of data at the same time. Therefore, the quality and distance of single-mode transmission are better than those of multi-mode. And single-mode is mostly using for long-distance outdoor transmission.For example, for an optical node, the application system includes network and monitoring. Among them, the network only needs one route, occupying 2-core optical fiber; monitoring has 4 routes, occupying 1-core optical fiber. A total of 3 core fibers requires the equipment room to the optical node.