What's the characteristics of aluminum shielded twisted-pair?
What's the characteristics of aluminum shielded twisted-pair? Shielded twisted-pair cable is wrapped with aluminum foil to reduce radiation, but it cannot completely eliminate the radiation. Shielded twisted-pair is more expensive because it is more difficult to install compared to UTP (Unshielded Twisted Pair). Similar to coaxial-cable, shielded twisted-pair should be equipped with shielding connector and corresponding installing techniques. But it has higher transmission rate of 155Mbps in 100m, higher than corresponding UTP.
There are four types of twisted-pair cable shielding: 1. Wrapping four pairs of wires only with aluminum foil; 2. Wrapping each pair of wires with aluminum foil and no metal net outside the four pairs. Since there is only one layer of shielding in outer sheath, it is called single shielded twisted-pair cable. 3. Wrapping four pairs of wires with aluminum foil and meal net; 4. Wrapping each pair of wires with aluminum foil and then add a metal net outside the four pairs. Since each wire has a layer of shielding and there is one layer of shielding in outer sheath, it is called double shielded twisted-pair cable.
Shielded twisted-pair can be classified as STP (Shielded Twisted-Pair) and FTP (Foil Twisted-Pair). STP refers that each wire has shielded twisted-pair on each shielding layer while FTP uses shielded twisted-pair for bulk shielding. It's worth noting that shielding works only when the whole cable is equipped with shielding devices and correctly grounded at both ends. Therefore, the whole system should be composed of shielding devices, including cable, socket, crystal plug and distribution frame. Meanwhile, the building should be equipped with well-functioning ground system. Shielded twisted-pair cable is wrapped with aluminum foil to reduce radiation, but it cannot completely eliminate the radiation. Shielded twisted-pair is more expensive because it is more difficult to install compared to UTP (Unshielded Twisted Pair). Similar to coaxial-cable, shielded twisted-pair should be equipped with shielding connector and corresponding installing techniques. But it has higher transmission rate of 155Mbps in 100m, higher than corresponding UTP.
