According to different shielding ways, the Shielded twisted-pair cable is divided into two kinds, namely the STP (Shielded Twicted - Pair) and FTP (Foil Twisted - Pair).STP is to point to each line has its shielded twisted-pair cable shielding layer, and the FTP is using the whole block is shielded twisted-pair cable is important to note that the screen only have all over the whole cable shielding device, and both ends under the condition of ground works correctly.So, for the whole system are all shielding device, including cables, sockets, crystal head and distribution frame, etc., at the same time, the buildings need to have a good ground system.
Shielded twisted-pair cable outer package by aluminum piece, to decrease slightly, but not completely eliminate the radiation.Shielded twisted-pair cable prices are relatively high, it difficult to than unshielded twisted pair cable installation.Similar to the coaxial cable, it must be equipped with support screen function of special connector and the corresponding installation technology.But it has high transmission rate, within 100 meters to 155 MBPS.
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