What is the major advantage of shielded twisted-pair over unshielded twisted pair cable?

Answer 1

UTP-Unshielded Twisted Pair. Normally UTP contains 8 wires or 4 pair. 100 meter maximum length. 4-100 Mbps speed.

STP-Shielded twisted pair. 100 meter maximum length. 16-155 Mbps speed. Lower electrical interference than UTP

Answer 2

UTP is a general class of cable that encompasses most variations of Cat3, Cat5 and Cat6 cables.

It indicated that the cable is composed of multiple pairs of conductors and that those conductors are twisted in pairs inside the jacket.

Answer 3

Shielded twisted-pair cable encases the signal-carrying wires in a conducting shield to reduce electromagnetic interference. Unshielded twisted-pair cable does not rely on physical shielding to block interference, but rather on media filters.

Answer 4

It offer more more resistant to EMI/RFI as compare to UTP as extra shielding is included in STP. Its price is also a little high as compare to UTP but both use the same connector RJ-45.

Thanks

Asif

Answer 5

An unshielded twisted pair is a pair of conductors (each with individual insulation) that are twisted together inside a jacket, or outer covering. The phone lines are just a single pair of separately insulated wires twisted together inside an outer covering. They were acceptable for what they did at the time, and we're still stuck with them today. A coaxial cable is a 2-conductor cable composed of a center conductor, an insulator that completely covers it, and an outer conductor that completely covers the insulator. A final layer of insulation or a "jacket" covers all of this. Those are the physical differences. The electrical differences generally center on the fact that coaxial cable ("coax") is the better choice to carry data or higher frequency electrical signals. The transmission of radio frequency (RF) electromagnetic signals in unshielded twisted pairs would result in a huge amount of loss of signal, and the pair would also radiate the signal to some extent. Note the a twisted pair is twisted to reduce both radiation and loss, and it can be used effectively in short runs to carry data. But any re-radiation might interfere with other equipment, and signal leakage is something we don't want a lot of. Coax, when it is in good condition and terminated properly, provides a good RF pathway and good shielding (minimum leakage) with regard to the environment. Twisted pair phone lines are still the norm in the U.S. (and lots of other places) because they're already in place. It would cost a mint to replace them all, but we're seeing cable companies offering phone service, and some phone companies offering cable service. In all these cases, we see services (cable, phone and internet connection) "bundled" into a package, and by doing this, companies are making an attempt to get away from the twisted pair and onto a coax. If you've ever used dial-up or even DSL internet connections, you've used the twisted pair for service. And there are limits to what can be done. But if you compare them to the high speed services offered by companies who give us a coax connection, you'll notice the increase in speed with which the data can be transferred. You'll load pages in the blink of an eye, and download large files and stream video with little effort. Many words say little a twisted pair can only equalize their own magnetic interference. Since the twist can be from many turns to few the impedance cannot be ascertain as a steady value. Coax cable do provide external magnetic insulation by the shield since the cable is evenly constructed a certain inpedance can be counted on at a paricular frequency and lenght. However like all cables at some frequency and lenght the inpedance can be virtual zero

Answer 6

Using AT&T Standard, Straight Cable & Cross Cable have different pin specifications for Pinouts at the both ends on the cable. Straight Cable connects wires at pin number 12345678 at one end to pins 12345678 at other end. Cross Cable connects wires at pins 12345678 at one end and changes wires pinouts to 36178245 at other end.

Answer 7

Unshielded Twisted Pair (UTP)

• Each pair of twisted wires are not protected by a plastic coating.

Shielded Twisted Pair (STP)

• Each pair of twisted wires are surrounded by a foil layer.

Answer 8

Shielded twisted will pick up much less noise and interference from electromagnetic radiation than an unshielded cable.

Answer 9

improves performance

maintains strong signals over longer distances

it reduces electromagnetic interference and emissions