L7 - Trunks and Multiplexing M any users sharing a common...

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Trunks and Multiplexing - Many users sharing a common link - cable, wire or optical fiber. Reason for multiplexing One high capacity link serves many users’ needs simultaneously.
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Categories of multiplexing 1. Time division multiplexing. Synchronous time division multiplexing. Statistical time division multiplexing. 2. Frequency division multiplexing. 3. Combined time and frequency division multiplexing. 4. Wavelength division multiplexing in optical fiber. (Same as frequency division multiplexing, but different terminology in optics.)
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Dividing in frequency and time
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The modulation property produces frequency multiplexing.
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Time Division Multiplexing (TDM) Used by telephone network after A/D conversion of voice signals. As has been mentioned, standard sampling rate is 8000 samples/second. Quantization is 7 or 8 bits/second. The standard. TDM frame - 1/8000 = 125 microsecond long - contains 24 channels, 8 bits each plus one extra bit to define the starting point.
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This note was uploaded on 07/16/2011 for the course EE 362 taught by Professor Unknow during the Spring '11 term at Penn College.

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L7 - Trunks and Multiplexing M any users sharing a common...

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