November 2007
Intermediate to advanced
736 pages
46h 32m
English
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SUBMARINE CABLES
Early submarine cables were all for telegraphy, the distortionless wider band needed for telephony could not economically be transmitted over long lengths of cable until component designers had produced long-life trouble-free units, capable of operating for many years in the depths of the oceans without fault incidence. These units, called repeaters, were designed to amplify incoming signals to offset the transmission losses incurred in the previous section of cable. It was also necessary to provide equalisation to offset the way different frequencies in the wideband information signal had been attenuated by different amounts. Such items were produced in the USA in the 1950s, and repeaters suitable for insertion in deep-sea cables ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.