A Brief History Of Fiber-Optic Communications
Optical communication systems date back to the 1790s, to the optical semaphore telegraph invented by French inventor Claude Chappe...
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Optical-Cable Construction
The core is the highly refractive central region of an optical fiber through which light is transmitted...
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power protection
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Simply PR is calculated by distributing the PR from all the back links to your page. Along with these it also depends on the content of your page. Some people say that 85% of your PR is calculated by the content of your page and the rest of the 15% are being calculated by links.
Nobody knows for sure how Google calculates PR, and how we can increase it. Important thing is that make your page as good as possible then automatically rest of the world will link to your page and you will get the PR value from these links.
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