Explain the following design parameters
S, SC, TC, C, CCI, EUF, K, TS
The various terms are given below:
S: Total number of switching components
A good design should attempt to minimize the number of switching components
SC: Switching capacity
Maximum number of simultaneous calls which can be supported through the switching system
TC: Traffic handling capacity
Traffic Handling Capacity is specified by Switching capacity /Theoretical maximum load
C: Cost of switching system
C = S x CS + CC + CCh
Here CS, CC, CCh are cost per switching component, cost of common control system and cost of the common hardware correspondingly.
CCI: Cost capacity index
It is switching capacity/cost per subscriber line
EUF: Equipment utilization factor
It is number of switching elements in operation while the SC is completely utilized/total number of switching elements in system
K: Number of switching stages
TS: Call setup time
TS = TST x K + TO
Here TO is the time needed for function other than switching and Tst is average switching time/stage.