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| n |
One of the time
slots of any full-duplex lines is connected to
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some other line
(at a time)
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| n |
Thus two
switches / time slot connect a line
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| n |
For 100
full-duplex lines at 19.6 kbps a 1.92 Mbps bus is thus
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required for no
blocking
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| n |
If no fixed
assignment of input lines to time slot but on demand
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allocation ->
blocking switch that reduces number of switches
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and switch
clock frequency. For instance 200 lines of 19.6 kbps
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with bus of 1.92
Mbps
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-> about half
of the devices can connect at any time, eg
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concentration is
2:1
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