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What is the difference between copper and fiber?

What is the difference between copper and fiber?
Copper and fiber are two distinct technologies and should not be confused. ADSL goes through the classic copper network deployed by Orange - formerly France Telecom - in order to introduce the telephone to homes.

ADSL is still the dominant technology for high-speed Internet access in France today, just as copper cable is still predominantly represented there.
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Can fiber "kill" copper?
The objective of generalizing fiber optics in France raises the question of the relevance of maintaining a copper network in parallel. In this regard, the public authorities have entrusted Paul Champsaur, former president of ARCEP , with a study mission on this subject. An experiment began in 2014 in the Ile-de-France municipality of Palaiseau, laboratory of a general migration towards all-optics . A highly complex subject than that of the extinction of the copper network, since compensation for the incumbent operator is to be expected, France Telecom currently enjoying the lucrative monopoly of copper service.

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