15
The time-switch
nOne of the time slots of any full-duplex
lines is connected to some other line (at a
time)
nThus two switches / time slot connect a line
nFor 100 full-duplex lines at 19.6 kbps a 1.92 Mbps bus
is thus required for no blocking
nIf no fixed assignment of input lines to time slot but
on demand allocation -> blocking switch
that reduces number of switches and switch
clock frequency. For instance 200 lines of 19.6 kbps with bus of 1.92 Mbps
-> about half of the devices can connect at any time, eg concentration is 2:1
-> about half of the devices can connect at any time, eg concentration is 2:1
