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Which model of loss system allows the usage of Poisson distribution model for traffic analysis especially by assuming infinite number of users?Which model of loss system allows the usage of Poisson distribution model for traffic analysis especially by assuming infinite number of users?
The answer is:
A. lost calls cleared (lcc)


Which type of holding time distribution is assumed for the voice conversation on telephone?Which type of holding time distribution is assumed for the voice conversation on telephone?
The answer is:
B. exponential


If the queuing systems are connected in tandem configuration, what would be the nature of delay?If the queuing systems are connected in tandem configuration, what would be the nature of delay?
The answer is:
A. commutative


In analyzing the traffic performance, how is the number of trunk decided with the provision of the Grade of Service (GoS) especially for larger group?In analyzing the traffic performance, how is the number of trunk decided with the provision of the Grade of Service (GoS) especially for larger group?
The answer is:
B. by overload condition


By which name/s is the Grade of Service (GOS) wellknown?By which name/s is the Grade of Service (GOS) wellknown?
The answer is:
A. call congestion


How is the relation between Erlang and CCS specified?How is the relation between Erlang and CCS specified?
The answer is:
A. 1 erlang = 36 ccs


The ratio of number of successful calls to the number of call attempts is known as ______The ratio of number of successful calls to the number of call attempts is known as ______
The answer is:
A. call completion rate (ccr)


Which assumption prooves call arrivals has Poisson's distribution?Which assumption prooves call arrivals has Poisson's distribution?
The answer is:
A. pure chance traffic


The process in which control signal shares the same path as voice and data is called as __________The process in which control signal shares the same path as voice and data is called as __________
The answer is:
B. inband signalling


Percentage of occupancy can be defined as the percentage of _____ for which the server seems to be busyPercentage of occupancy can be defined as the percentage of _____ for which the server seems to be busy.
The answer is:
D. time


Erlang B and ErlangC formulae became foundational results in _________Erlang B and ErlangC formulae became foundational results in _________
The answer is:
C. both 1 and 2


A message of one signal unit length is called as _________A message of one signal unit length is called as _________
The answer is:
A. single unit message


________ group of trunk's system is more efficient________ group of trunk's system is more efficient.
The answer is:
C. large


The system in which call requests are kept waiting due to unavailability of trunks is known as ____________The system in which call requests are kept waiting due to unavailability of trunks is known as ____________
The answer is:
B. queueing system


If a group of trunk is offered 1200 calls during the busy hour & 20 calls are lost along with the average call duration of about 7 min, then what would be the total duration of congestion period?If a group of trunk is offered 1200 calls during the busy hour & 20 calls are lost along with the average call duration of about 7 min, then what would be the total duration of congestion period?
The answer is:
C. 57.6 sec


Customer line signalling is used for __________Customer line signalling is used for __________
The answer is:
D. all of the above


CCS signalling network is based on __________CCS signalling network is based on __________
The answer is:
D. all of the above


During Busy hour, 1000 calls were offered to a group of trunks and 5 calls were lost. The average call duration was 2 minutes. Find Grade of Service (B)During Busy hour, 1000 calls were offered to a group of trunks and 5 calls were lost. The average call duration was 2 minutes. Find Grade of Service (B)
The answer is:
B. 0.005


A group of 5 trunks is offering 2 Erlangs of traffic. Find the probability that at least one trunk is freeA group of 5 trunks is offering 2 Erlangs of traffic. Find the probability that at least one trunk is free.
The answer is:
D. 0.963


During Busy hour, 1200 calls were offered to a group of trunks and 6 calls were lost. The average call duration was 3 minutes. Find Traffic carried(Ac)During Busy hour, 1200 calls were offered to a group of trunks and 6 calls were lost. The average call duration was 3 minutes. Find Traffic carried(Ac)a
The answer is:
C. 59.7e

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