STP cabling includes metal shielding over each individual pair of copper wires. This type of shielding protects cable from external EMI (electromagnetic interferences). e.g. the 150 ohm shielded twisted pair cables defined by the IBM Cabling System specifications and used with token ring networks.
Screened Shielded Twisted Pair (S/STP)
S/STP cabling, also known as Screened Fully shielded Twisted Pair (S/FTP),[1] is both individually shielded (like STP cabling) and also has an outer metal shielding covering the entire group of shielded copper pairs (like S/UTP). This type of cabling offers the best protection from interference from external sources.
S/STP cabling, also known as Screened Fully shielded Twisted Pair (S/FTP),[1] is both individually shielded (like STP cabling) and also has an outer metal shielding covering the entire group of shielded copper pairs (like S/UTP). This type of cabling offers the best protection from interference from external sources.
Screened Unshielded Twisted Pair (S/UTP)
S/UTP, also known as Fully shielded (or Foiled) Twisted Pair (FTP), is a screened UTP cable.
S/UTP, also known as Fully shielded (or Foiled) Twisted Pair (FTP), is a screened UTP cable.
Advantages
It is a thin, flexible cable that is easy to string between walls.
Most modern buildings come with CAT 5 UTP already wired into the wall outlets or at least run between the floors.[citation needed]
Because UTP is small, it does not quickly fill up wiring ducts.
UTP costs less per foot than any other type of LAN cable.
It is a thin, flexible cable that is easy to string between walls.
Most modern buildings come with CAT 5 UTP already wired into the wall outlets or at least run between the floors.[citation needed]
Because UTP is small, it does not quickly fill up wiring ducts.
UTP costs less per foot than any other type of LAN cable.
Disadvantages
Twisted pair’s susceptibility to the electromagnetic interference greatly depends on the pair twisting schemes (usually patented by the manufacturers) staying intact during the installation. As a result, twisted pair cables usually have stringent requirements for maximum pulling tension as well as minimum bend radius. This relative fragility of twisted pair cables makes the installation practices an important part of ensuring the cable’s performance.
Twisted pair’s susceptibility to the electromagnetic interference greatly depends on the pair twisting schemes (usually patented by the manufacturers) staying intact during the installation. As a result, twisted pair cables usually have stringent requirements for maximum pulling tension as well as minimum bend radius. This relative fragility of twisted pair cables makes the installation practices an important part of ensuring the cable’s performance.
Minor Twisted Pair variants
Nonloaded twisted pair: A twisted pair that has no intentionally added inductance. Wires that go more than a mile (1.6 km) usually have load coils to increase their inductance, unless they are to carry higher than voiceband frequencies.
Nonloaded twisted pair: A twisted pair that has no intentionally added inductance. Wires that go more than a mile (1.6 km) usually have load coils to increase their inductance, unless they are to carry higher than voiceband frequencies.
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