The cable core is made up of one reliable or stranded central energy element that is definitely surrounded by optical fibres; they're either arranged loosely in a rigid core tube or packed tightly into a cushioned, adaptable outer jacket. That getting explained, there are ways to do it and diligent https://sites.google.com/view/dienphucthinh/cap-tin-hieu-am-thanh-chinh-hang-tai-dien-phuc-thinh