2. A Time Space (TS) switch has 100 Time Division Multiplexing (TDM) input lines. Each input line carries 128 channels. A one stage matrix is used for the space switch. (a) Calculate the number of crosspoint for the TS switch. A Time Space Time (TST) switch is proposed to replace the TS switch. The blocking probability of the new TST is 0.001 and the traffic carried by each link is 0.1 Erlang. (a) Determine the number of space stage time slot of the switch. (b) Calculate the number of crosspoint for the TST switch.

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2. A Time Space (TS) switch has 100 Time Division Multiplexing (TDM) input lines. Each
input line carries 128 channels. A one stage matrix is used for the space switch.
(a) Calculate the number of crosspoint for the TS switch.
A Time Space Time (TST) switch is proposed to replace the TS switch. The blocking
probability of the new TST is 0.001 and the traffic carried by each link is 0.1 Erlang.
(a) Determine the number of space stage time slot of the switch.
(b) Calculate the number of crosspoint for the TST switch.
Which switch should be choosen for the PSTN?
Transcribed Image Text:2. A Time Space (TS) switch has 100 Time Division Multiplexing (TDM) input lines. Each input line carries 128 channels. A one stage matrix is used for the space switch. (a) Calculate the number of crosspoint for the TS switch. A Time Space Time (TST) switch is proposed to replace the TS switch. The blocking probability of the new TST is 0.001 and the traffic carried by each link is 0.1 Erlang. (a) Determine the number of space stage time slot of the switch. (b) Calculate the number of crosspoint for the TST switch. Which switch should be choosen for the PSTN?
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