Download GTU BE/B.Tech 2019 Winter 6th Sem New 2161103 Telecommunication Switching Systems And Networks Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER- VI (New) EXAMINATION - WINTER 2019

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Subject Code: 2161103 Date: 09/12/2019

Subject Name: Telecommunication Switching systems and Networks

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

1. Classify the switching systems. (03)
2. Draw and explain simplex telephone circuit with necessary equations. (04)

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3. Draw and explain two stage network with multiple switching matrices in each stage. Also derive the equation of blocking probability. (07)

Q.2

1. Compare electromechanical switching system with electronic switching system. (03)
2. Derive the formula for availability and unavailability of microprocessor for single as well as dual processor system. (04)
3. Draw and explain selector hunter and line finder based subscriber access approaches used in step by step Strowger switching system. (07)

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OR

1. Draw diagram for three stage switching network and using Lee’s graph, derive the equation of blocking probability. (07)

Q.3

1. Define following terms: (03)
   1. Peak Busy Hour
   2. Busy Hour Call Attempts (BHCA)

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   3. Busy Hour Calling Rate (BHCR)
2. Write short not on Lost calls Hold system. (04)
3. Draw the diagram for Input controlled-time division space switching and explain it in detail. (07)

OR

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1. Define following terms: (03)
   1. Call Completion Rate (CCR)
   2. Traffic Intensity E.
   3. Grade of Services (GOS)
2. Write short not on Lost calls returned system. (04)

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3. Draw the diagram of Time multiplexed Space Switch and explain it in detail. (07)

Q.4

1. Explain channel association signaling with necessary diagram. (03)
2. Explain folded and non-folded network. (04)
3. Explain Birth Death Process in detail with state transition. (07)

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OR

1. Enlist the difference between In-channel and Common Channel Signaling. (03)
2. Write short note on ionospheric communication. (04)
3. What are the advantages of Hierarchical Networks? Discuss the 5-level switching hierarchy recommended by CCITT. (07)

Q.5

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1. Draw ISDN Address structure. What is the significance and size of each field. (03)
2. Explain B and D channels of ISDN. What is the significance and data rate of B and D channels? (04)
3. Explain slotted ALOHA in detail and derive the equation of Throughput. (07)

OR

1. Explain store and forward switching with necessary diagram. (07)

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2. Explain ISDN Functional grouping and Reference points in detail. (07)