Grade of Service (GoS)


Grade of Service (GoS)



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GoS is a measure of the probability that a percentage of the offered traffic will  be blocked or delayed.
Grade of service is used to observe and measure how many calls are offered, carried and lost in the system.

    GoS is also defined as proportion of calls which are allowed to fail in busy hour due limitation or economic reasons of the amount of switching equipment. 


The term GOS, B is defined as the ratio of lost traffic to offered traffic:

B= Number of Call Lost / Number of Call Offered
or
B= Traffic Lost / Traffic Offered




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