Whois & Analysis for upc.ch

An optical fiber or optical fibre is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair.

Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data rates) than wire cables.

Fibers are used instead of metal wires because signals travel along them with lesser amounts of loss; in addition, fibers are also immune to electromagnetic interference, a problem from which metal wires suffer excessively.

Fibers are also used for illumination, and are wrapped in bundles so that they may be used to carry images, thus allowing viewing in confined spaces, as in the case of a fiberscope.

Specially designed fibers are also used for a variety of other applications, some of them being fiber optic sensors and fiber lasers.

Virgin Media Ireland is Liberty Global's telecommunications operation in Ireland.

It is the largest digital cable television provider within the Republic of Ireland.

As of 31 December 2014, the company offers broadband internet, digital television and digital (VoIP) telephony to 1.1 million customers.

Virgin Media Ireland previously traded under the branding Chorus NTL until 4 May 2010 and UPC Ireland until 5 October 2015.

It is primarily in competition with Sky Ireland, eir and Vodafone in the Irish pay TV market.

Digital television (DTV) is the transmission of audio and video by digitally processed and multiplexed signal, in contrast to the totally analog and channel separated signals used by analog television.

Digital TV can support more than one program in the same channel bandwidth.

It is an innovative service that represents the first significant evolution in television technology since color television in the 1950s.

Several regions of the world are in different stages of adaptation and are implementing different broadcasting standards.

Below are the different widely used digital television broadcasting standards (DTB):

Cable television is a system of delivering television programming to paying subscribers via radio frequency (RF) signals transmitted through coaxial cables, or in more recent systems, light pulses through fiber-optic cables.

This contrasts with broadcast television, in which the television signal is transmitted over the air by radio waves and received by a television antenna attached to the television.

FM radio programming, high-speed Internet, telephone services, and similar non-television services may also be provided through these cables.

A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly.

A telephone converts sound, typically and most efficiently the human voice, into electronic signals suitable for transmission via cables or other transmission media over long distances, and replays such signals simultaneously in audible form to its user.