1. What Is The Difference Between Utp Ftp And Stp
2. What Is Utp Ftp Stp 1

STP (Shielded Twisted Pair)It is a twisted pair cable similar to (UTP) with the difference that each pair has a protective shield, in addition to having an outer sheet of aluminum or copper braided around the set of pairs, designed to reduce the absorption of electrical noise. What is the difference between UTP, STP, FTP, and S/FTP? 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. Twisted pair in computer LAN can be divided into two categories: unshielded twisted pair (UTP) and shielded twisted pair (STP): STP is wrapped by a layer of metal material to reduce radiation and prevent information from being eavesdropped. It has a high data transmission rate, but the price is high, and the installation is complicated.

Unshielded Twisted Pair (UTP) : UTP is the copper media, inherited from telephony, which is being used for increasingly higher data rates, and is rapidly becoming the de facto standard for horizontal wiring, the connection between, and including, the outlet and the termination in the communication closet.

A Twisted Pair is a pair of copper wires, with diameters of 0.4-0.8 mm, twisted together and wrapped with a plastic coating. The twisting increases the electrical noise immunity, and reduces the bit error rate (BER) of the data transmission. A UTP cable contains from 2 to 4200 twisted pairs.

UTP is a very flexible, low cost media, and can be used for either voice or data communications. Its greatest disadvantage is the limited bandwidth, which restricts long distance transmission with low error rates.

Shielded Twisted Pair (STP) : STP is heavier and more difficult to manufacture, but it can greatly improve the signaling rate in a given transmission scheme Twisting provides cancellation of magnetically induced fields and currents on a pair of conductors. Magnetic fields arise around other heavy current-carrying conductors and around large electric motors. Various grades of copper cables are available, with Grade 5 being the best and most expensive.

Grade 5 copper, appropriate for use in 100-Mbps applications, has more twists per inch than lower grades. More twists per inch means more linear feet of copper wire used to make up a cable run, and more copper means more money.

Shielding provides a means to reflect or absorb electric fields that are present around cables. Shielding comes in a variety of forms from copperbraiding or copper meshes to aluminized.

Mylar tape wrapped around each conductor and again around the twisted pair.

Like a shield used during battle, shielding in cables acts as a barrier that protects the cable from external threats, such as electrical interference (EMI). It also prevents cable signals from interfering with surrounding cables and equipment.

While not all environments demand such a robust cable, shielding is becoming more common. When it first became available, shielded cables were used in areas such as factory floors, areas with high concentrations of electrical equipment, and secure communications applications. Today, shielded cable is prevalent in many types of applications, including government, healthcare and even education.

There are many acronyms used to describe shielded cables, from STP to F/FTP; while many are often used synonymously, nearly all of them have different meanings. This blog provides basic information about each style, as defined by ISO/IEC 11801:200, to clear up the confusion.
F/UTP (FTP)
An overall foil shield (F) with unscreened twisted pairs (UTP). This cable is very much like common UTP cables, with the addition of foil underneath the main cable jacket. Another common name for this cable is FTP. F/UTP cables are common in 10GBaseT applications.
S/UTP
An overall braid screen (S) with unscreened twisted pairs (UTP). This is occasionally referred to as an STP cable, but beware: There are other shielded cables among this list that may also claim this term. To be sure, always check to see whether your cable will have any kind of overall barrier, and whether the individual pairs have their own shield.
SF/UTP
Both an overall braid screen (S) and foil shield (F) with unscreened twisted pairs (UTP). This cable is also occasionally referred to as an STP cable. Cables with an overall braided screen are very effective at protecting EMI from entering or exiting the cable.
S/FTP
An overall braid screen (S) with foil screened twisted pairs (FTP). The “shield” underneath the jacket is a braid, and each individual pair is surrounded by its own foil barrier. The purpose of the additional foil on individual pairs is to limit the amount of crosstalk between them.

SF/FTP

An overall braid screen (S) and an overall foil shield(F) with foil screened twisted pairs (FTP). The “shield” underneath the jacket is a braid and then a foil, and each individual pair is surrounded by its own foil barrier.
F/FTP
An overall foil shield (F) with foil screened twisted pairs (FTP). Similar to F/UTP cables, these shielded cables are commonly used in 10GBaseT applications.
U/FTP
No overall shielding or braid (U) with foil screened twisted pairs (FTP). This type of shielded cable is commonly used in 10GBaseT applications as well.
U/UTP
Notice anything wrong here? You caught us! This cable is not shielded at all, and is the common unshielded cable most often referred to as UTP cable.

The code before the slash designates the shielding for the cable itself, while the code after the slash determines the shielding for the individual pairs:

U = unshielded
F = foil shielding
S = braided shielding (outer layer only)
TP = twisted pair
TQ = twisted pair, individual shielding in quads

What Is The Difference Between Utp Ftp And Stp

Now You Know!
Now that you’ve read through these shielded cable types, you can refer to this handy guide to keep them straight. But it can still be confusing to wade through acronyms like STP, F/FTP, and FTP when selecting the right cable for your project.

What Is Utp Ftp Stp 1

If you have any questions, or are looking for a specific shielded cable, Comnen can help. Our global facilities produce a variety of shielded cable styles, and our experts can help you find what you need. Email to: sales@comnen.com