光缆 ,重量轻、体积小、容量大、传输距离远、信号衰减小、抗电磁干扰 ,各种网络广泛采用。光缆结构复杂 ,品种繁多 ,有许多因素如用料、生产工艺、设备等影响到它的性能、质量及寿命。因此 ,在建网时 ,对光缆的结构、用料、工艺等 ,必须有深入的了解 ,以便选购合适的优质光缆? Cable, light weight, small size, large capacity, transmission distance, signal attenuation, anti-electromagnetic interference, widely used in various networks. Cable structure is complex, a wide variety, there are many factors such as materials, production processes, equipment, etc. affect its performance, quality and life expectancy. Therefore, in the construction of the network, the structure of the cable, materials, processes, etc., must have in-depth understanding in order to purchase the right quality optical cable?