Screened Shielded Twisted-Pair (S/STP or S/FTP) The decision to use ScTP often boils down to simply having the secure feeling of knowing that an extra shield has been installed. The value of a ScTP system in relation to its higher cost is often questioned, as tests indicate that the noise immunity and emission characteristics of UTP are comparable with ScTP. Good to remember when you use our LAN extenders family. ScTP is also for example used in restaurants where wireless headsets are used by workers, as various wireless frequencies interfere with Ethernet over copper. ScTP is typically used in environments that have an abnormally high level of ambient electromagnetic interference, including hospitals, industrial work spaces, airports, and government and military communications centers. There are many manufacturers of ScTP cable and components, but make sure you follow all installation guidelines. Standard eight pole modular jacks (commonly called RJ-45) can’t ensure a proper ground through the cable shield, so special patch panels, jacks, mating hardware and tools must be used to install a ScTP cabling system. The overall effect is that the noise generated is out of band.

If this is not done, a massive antenna is effectively created with a frequency inversely proportional to the shield length.

Yes, that’s correct – not only should the wires’ continuity be maintained through connections, but also the shield’s continuity.Īs with STP cabling, the system must be connected to ground at both ends of each cable run. When implementing an effective ScTP system however, the shield’s continuity should be kept through the whole channel, including wall plates, patch panels and patch cords. ScTP is less susceptible to noise because of the foil shield. The shield is also often smaller than some types of STP cabling. ScTP cable is basically STP cabling without the individual pairs being shielded. The foil shield is typically smaller than the woven copper braided jacket used by STP cabling systems. ScTP is therefore also called FTP (foil twisted-pair), as a foil shield surrounds the conductors. ScTP cable typically consists of four pairs of 100 ohm, 24 AWG wire that are unshielded, but surrounded by a shield of foil and includes a single drain wire used for grounding. Screened twisted-pair (ScTP) cabling is recognized by the AN 51 / TIA-568-C standard.

What is utp ftp stp