September 2001
Beginner
528 pages
14h 14m
English
Content preview from Essential Guide to Telecommunications, The, Third EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Time Division Multiple Access, GSM and Code Division Multiple Access Air Interfaces
All digital wireless services use multiplexing techniques to carry more calls on the same amount of spectrum as analog cellular service. Multiplexers are devices that transmit signals from two or more devices over a single channel. Thus, while all digital services have more capacity than analog cellular, the ways they add capacity are incompatible with each other. That is why callers cannot necessarily use their cellular telephones when they travel. The three most prevalent multiplexing techniques in the world are time division multiple access (TDMA), code division multiple access (CDMA) and Global System for Mobile Communications (GSM). When used in wireless ...
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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.