Gujarat Technological University 2010 M.E Telecom Switching System, Networks and Networks Managent - Question Paper
Seat No. :__Enrolment No._
GUJARAT TECHNOLOGICAL UNIVERSITY
M.E Sem-II Examination July 2010
Subject code: 720401 Subject Name: Telecom Switching System, Networks and Networks Management Date: 05 /07 /2010 Time: 11.00am - 1.30pm
Total Marks: 60
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Derive blocking probability of three stage space network using lees graph. 06 (b) A three stage switching structure supports 128 inlets and 128 outlets. It is 06 proposed to use 16 first and third stage matrices. At peak periods, the occupancy rate of an inlet is 10%. If the number of switching elements required for nonblocking operation is reduced by a factor of 3, what is the blocking probability of the network?
Q.2 (a) In a TS switch, M=128, N=16 and the number of subscribers connected to 06 the system is 0.1MN. Determine the blocking probability of the switch if (a) all the subscribers are active at the same time (b) only 50% of the subscribers are active simultaneously.
(b) Calculate the access time of the memory modules in serial-in/parallel-out 06 configuration of time multiplexed time division time switch for overlapped and non-overlapped operation using 64 input and 64 output streams with each stream multiplexing 128 channels.
OR
(b) Explain parallel-in/serial-out configuration of time multiplexed time division 06 time switch.
Q.3 (a) 10,000 subscribers are connected to an exchange. If the exchange is designed 06 to achieve a call completion rate of 0.8 when the busy hour calling rate is 4.8, what is the BHCA that can be supported by the exchange? What should be the call processing time for this exchange?
(b) Consider a B-D process with coefficients 06
Xk(0)=X for k=0 or 0 for k0 k(0)= for k=0 or 0 for k0
Give the differential-difference equations for P0(t) and P1(t). Solve these equations and express the answers in terms of P0(0) and P1(0).
OR
Q.3 (a) Derive the blocking probability of Lost Call Cleared System with Infinite 06 Sources model of lost system.
(b) Explain time slot interchange switch. 06
Q.4 (a) Enlist messages of SNMPv1 and explain function of each message in detail. 06 (b) What are the Internet MIB-II groups of SNMPv1? and briefly describe 06 function of each group.
OR
Q.4 (a) Explain GetRequest and Trap protocol data unit (PDU) in detail with PDU 06 structure.
(b) Explain advantages of Get-next-request over Get-request of SNMPv1 using 06 appropriate example.
Q.5 (a) What are the advantages of Remote monitoring network (RMON)? 06
(b) What is the main disadvantage of SNMPv2? Explain bilingual manager and 06 SNMP proxy server migration schemes from SNMPv1 to SNMPv2.
OR
Q.5 (a) Explain SNMPv3 architecture. 06
(b) What are the basic software tools for network management? And explain 06 each in brief.
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