The transmission bearer connecting BBU and RRU equipment is optical module and optical fiber. FS provides 1/2/4G transceivers modules in SFP form factor, supporting transmission distances from 100m to 120km over SMF/MMF fiber and enabling low power and cost-effective connectivity solutions. Purchase from nearby warehouses. First deployed in 2006, 4G now supports by far the broadest range of IoT solutions active today. And, with 5G still rolling out, there is plenty of room for growth and full lifecycles with. 4G (or LTE) is the fourth generation of cellular network connectivity from 206. The optical module PCB is made of Shengyi S1000-2M material, surface gold-plated and local thick gold-plated production process, the minimum aperture is 0. 15mm, and the minimum line width and line.