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calculate the blocking probably pb in 100 line strowger switching system where 10 calls are in progress and 11th one arrives probably that there is a
in a subscriber loop that contains a series resistance of 300 ohms to protect the batteries in the exchange a normalized telephone draws 10 ma and
in a two stage network there are 512 inlets and outlets rs24 if the probability that a given inlet is active is 08 calculate blocking
in a two stage network there are 512 inlets and outlets rs24 if the probability that a given inlet is active is 08 calculate switching capacitygivenn
in a two stage network there are 512 inlets and outlets rs24 if the probability that a given inlet is active is 08 calculate the switching
define congestioncongestion this is uneconomic to give sufficient equipment to carry all the traffic which could possibly be offered to a
in a particular exchange during busy hour 1200 calls were offered to a group of trunks during this time 6 calls were lost the average call duration
define congestion and grade of service congestion this is uneconomic to give sufficient equipment to carry all the traffic which could possibly be
a three stage switching structure supports 100 inlets and 400 outlets find the number of cross points and the number of primary and secondary
an amplifier has an input resistance of 600 ohms and a resistive load of 75 ohms when it has an rms input voltage of 100 mv the rms output current is
a group of 20 servers carry traffic of 10 erlangs if the average duration of a call is three minutes calculate the number of calls put through by a
an exchange uses a -40 v battery to drive subscriber lines a resistance of 250 ohms is placed in series with the battery to protect it from short
calculate the number of trunks that can be supported on a time multiplexed space switch given that 32 channels are multiplexed in each stream while
in a 10000 line exchange 0000 to 2999 is allotted to x group of subscribers out of which 40 are active during busy hour the remaining numbers are
discuss grade of service during busy hour 1500 calls were offered to a group of trunks and 8 calls were lost the average call duration was 120
a three stage network is designed with the following parametersmn512 p q 16 and alpha 065 calculate the blocking probability of the network if s16
in a national transmission system the characteristic impedances of the 4-wire circuit and the 2-wire circuit are 1200 and 1000 respectively the
a subscriber makes three phone calls of 3 minutes 4 minutes and 2 minutes duration in a one hour period calculate the subscriber traffic in erlangs
sky wave communication is prone to fading it is true or falseansit is true that sky wave communication is prone to
a certain amount of side tone is essential in telephone communicationansit is true that a specific amount of side tone is necessary in telephone
a two stage non-blocking network requires twice the number of switching elements as the single stage non-blocking network it is true or falseansit is
the larger the grade of service the worse is the service given it is true or falseansit is true that larger the grade of service the worse service is