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INTRODUCTION TO GROUP MEMBER

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Grade of Service (GoS)

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Grade of Service (GoS) Video 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 For more information:  https://en.wikipedia.org/wiki/Grade_of_service
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This is Agner Krarup Erlang Erlang     An Erlang is a unit of telecommucications traffic measurement.    An Erlang is defined as the average number of simultaneous calls on a system during one-        hour period.    Erlang defined as the traffic carried by a  group of trunks      In honor of Agner Krarup Erlang What is Erlang?      Erlang = 1 call hour / hour     1 Erlang = 1 hour ( 60 minutes) of traffic   Erlang = (calls/busy hour) x holding time                          Tips: units must be the same ! Erlang Example Question A subscriber makes 3 phone calls of 3 minutes, 4 minutes , and 2 minutes duration in 1 hours period. Calculate Minutes of traffic in the hour = number of calls x duration Minutes of traffic in the hour = (4min+3min+2min) Hours of traffic in the hour    = 9 minutes / 60 minutes Hours of traffic in the hour   = 0.15 Traffic of traffic in the hour  = 0.15 Erl
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