Information System

hello . hye . haha .  . Now, i have many thing about telecommunication to share with you.

but this is my first post

This post about Twisted Pair Wire .

introduction

twisted pair wire

haa , that's is a twisted pair wire. twisted pair wire is a  cable made by intertwining two separate insulated wires. There are two twisted pair types: shielded and unshielded. A Shielded Twisted Pair (STP) has a fine wire mesh surrounding the wires to protect the transmission; an Unshielded Twisted Pair (UTP) do not. Shielded cable is used in older telephone networks, as well as network and data communications to reduce outside interference.

SHIELD TWISTED PAIR (STP)


Shielded Twisted Pair Cable is used to eliminate inductive and capacitive coupling. Twisting cancels out inductive coupling, while the shield eliminates capacitive coupling. Most applications for this cable are between equipment, racks and buildings. Shielding adds usually some attenuation to the cable (compared to unshielded), but usually not because in the case of balanced transmission, the complementing signals will effectively cancel out any shield currents, so shield current losses are negligible.


UNSHIELDED TWISTED PAIR (UTP)

Unshielded Twisted Pair cable is most certainly by far the most popular cable around the world. UTP cable is used not only for networking but also for the traditional telephone (UTP-Cat 1). There are 6+ different types of UTP categories and, depending on what you want to achieve, you would need the appropriate type of cable. UTP-CAT5e is the most popular UTP cable, it came to replace the well known coaxial cable which was not able to keep up with the continuous growth for faster and more reliable networks