The cable core contains just one stable or stranded central energy aspect that may be surrounded by optical fibres; they're possibly arranged loosely inside a rigid core tube or packed tightly right into a cushioned, versatile outer jacket. Wifi and internet are two various things. Wifi is really an alternative https://dienphucthinh.blogspot.com/2025/05/cap-tin-hieu-rs-485-tai-ien-phuc-thinh.html