November 2007
Intermediate to advanced
736 pages
46h 32m
English
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MULTIPLEXING
All transmission media have capacities great enough to carry more than one voice channel. In other words, their bandwidths are considerably greater than the 3 kHz needed for transmitting the human voice. At the top end of the scale microwave and fibre-optic circuits carry thousands of voice channels; at the lower end of the scale, each voice channel may be split into 12 or 24 telegraph channels.
Where a facility is set up, such as a chain of microwave links, which has a broad bandwidth it is very desirable to make the maximum use of this bandwidth by making it carry as many channels as possible. It is often desirable to construct a communication link with as wide a bandwidth as possible and then divide the bandwidth between as many ...
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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.