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Synchronous time division multiplexing

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Twenty voice signals are to be multiplexed and transmitted over twisted pair. What is the bandwidth required (in bps) if synchronous time division multiplexing is used, along with the standard analog-to-digital sampling rate, and each sample is converted into an 8-bit value?

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Please refer to http://en.wikipedia.org/wiki/Sampling_rate for more information on common voice sampling rates in use. This response considers standard human voice sampling rate used in telephone transmission, which is 8000 Hz or 8000 ...

Solution Summary

The actual bandwidth requirement will be slightly more because when these twenty voice signals (channels) are multiplexed to form a frame ... .

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I need to find the following information for Cissco and their competitors and do the questions below:

Net operating profit (NOPAT) margin and net operating asset (NOA) turnover for several selected companies for 2005 follow:
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Albertsons, Inc 3.59 2.20%
Alcoa, Inc 1.51 5.93%
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Target Corporation 2.23 4.54%

1. Graph the NOPAT margin and NOA turnover for each of these companies. Do you see a pattern revealed that is similar to that shown in the text? Explain. (Note that the graph in the text is based on averages for selected industries. The graph for this problem uses fewer companies and, thus, will not be as smooth.)
2. Consider the trade-off between profit margin and asset turnover. How can we evaluate companies on this margin and turnover trade-off? Explain.
3. Do the RNOAs appear adequate to attract capital? Explain. If not, are there unique industry issues that exist in 2005 that might explain a temporary downturn in RNOA?

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