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The T-Carrier System

The T-Carrier system is a telecommunication technology that consists of high-speed digital lines made up of multiple channels. It is another one of the communication possibilities provided by the POTS. The T-Carrier system can be used for the high-speed transfer of voice, video, and data. Each channel on a line can provide 64Kbps of throughput. By combining a number of channels into one line, different elements, such as voice and data, can be moved at the same time over the same line (with each carried by a different channel).

The device that combines signals carried on these separate channels (when data must be sent over the digital line as a single data stream) and that also has the ability to split a received data stream into the appropriate channels is called a multiplexer or MUX . A multiplexor actually works along the same lines as a cable-ready television or VCR. A single data signal comes into your home from the local cable television provider, and your cable-ready television or VCR contains a multiplexer that breaks the data feed down into the 100+ television channels that you are constantly surfing (no one ever said that more channels would provide better programming). That's what broadband transmission is all about—multiple channels on a single feed.


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