Tuesday, July 15, 2014

Different Varieties of Telephone Cabling

Telephone cabling is the network of wires which connect an office or home telephone to a centralized telephone switching centre. Although many people nowadays primarily depend on their cell phones, a ground telephone still plays a major role in the smooth running of many business organizations and household or family operations. There are different types of cabling that are used for establishing telephone lines, all of which can be installed for users in United Kingdom by NEC Telephone System UK. Some of them have been discussed below:

Fibre optic cables

Fibre optics is among the most widely used telephone cabling used throughout the world nowadays. These cables come with a basic central glass core that’s sheathed with soot to facilitate reflection of light beam by the glass core. They also have a plasticized coloured coating that functions as a protective covering. As these cables use lasers to transmit data instead of conventional electrical pulses, no issue of electrical interference is experienced with them. As lasers attenuate much slowly than electrical signals, they are often preferred over conventional copper cabling when it comes to transmitting signals over long distances.

UTP or Unshielded Twisted Pair

UTP cables, also known as Unshielded Twisted Pair cables are preferred by many as they are easy to install and very cost effective. They avoid crosstalk or interference by twisting 4 pairs of 22-gauge wires within the main cable. However, these wires are still vulnerable to electrical and radio interference, which really doesn’t make them the most secured means of telephonic data transfer.

STP or Shielded Twisted Pair

STP or shielded twisted pair cables uses 4 pairs of wires twisted around each other, much like the UTP cables. Each of the wire pair is wrapped by a foil shield and all of the four pairs are again covered by another foil shield. A piece of braided metal shield helps in blocking out interference. STP cables are more effective at resisting interference, even though they are somewhat more expensive than the UTP cables.

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