UTP STP FTP and SFTP of ethernet cable

Fri Dec 16 20:54:09 CST 2022

What is the difference between UTP, STP, FTP, and S/FTP?

Ethernet connected through a network cable may encounter a large amount of EMI in some places, and the immunity of the cable to EMI is important.

The acronyms here are U, F and S. U stands for "Unshielded", S stands for "Shielded", and F stands for "Foil".

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The shielding inside your cable acts as a barrier to protect the cable from electromagnetic interference (EMI), radio frequency interference (RFI) and crosstalk between pairs and adjacent cables. It also prevents the signal from the cable interfering with surrounding equipment. The various levels of shielding offer a range of different advantages suitable for a number of applications.

The type of shielding a copper cables have can have a tremendous effect on the stability, performance, speed, and longevity of the cable and ultimately your network. Below we breakdown the most widely used types of shielding available for Ethernet cables and what they mean.

Unshielded Twisted Pair (UTP)

As the title states, a UTP cable has no shielding. This is the most used and most basic type of cable. The cable contains pairs of wires twisted together to help reduce and prevent electromagnetic interference.

Shielded Twisted Pair (STP)

STP cables are similar to UTP cables, where the wires are twisted together and then wrapped with a shielding or screening material which consits of foil wrapping or a copper braid jacket.

Foil Twisted Pair (FTP)

With FTP cables, each twisted pair of cables is wrapped in a shielding of foil to protect the cable from EMI and crosstalk.

Shielded Foil Twisted Pair (S/FTP)

A cable that is classified as S/FTP or Shielded Foil Twisted Pair is a combination of both FTP and STP shielding. The wires inside the cable are twisted and then shielded with a foil wrapping, then the 4-pair grouping of foiled wires are shielded by a wrapping of either foil or a flexible braided screening. This provides the highest level of protection against EMI and crosstalk.

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Related News about the topic of Ethernet:

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● 2 - UTP STP FTP and SFTP of ethernet cable

● 3 - Ethernet cable transmission principle

● 4 - Ethernet Terminology

● 5 - Why use crossover ethernet cable

● 6 - Ethernet Wire Sequence Diagram

● 7 - Why use twisted pair

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By HornmicLink_Henry @221216 20:58