JNTU Kakinada B-Tech 4-1 ELECTRONIC SWITCHING SYSTEMS R13 March 2018 Question Paper

IV B.Tech I Semester Supplementary Examinations, February/March – 2018
ELECTRONIC SWITCHING SYSTEMS (Electronics and Communication Engineering)Time: 3 hours Max. Marks: 70
Question paper consists of Part-A and Part-B
Answer ALL sub questions from Part-A
Answer any THREE questions from Part-B
*****
PART ?A (22 Marks)
1. a) With neat sketch Manual Switching System. [3]
b) Discuss about centralized SPC. [3]
c) Discuss the charging plan used in telephone networks. [4]
d) State and explain ?E rla ng B? formula for offeredtraffic intensity ?A ? and ? No. of
Servers ?N ?.
[4]
e) State and explain formula for the Grade of Service of loss systems in tandem. [4]
f) Write Short notes on Numbering and Addressing of ISDN. [4]

PART ?B (3×16 = 48 Marks)
2. a) How are switching systems classified? Explain a how stored program control is
superior to hard wired control.
[8]
b) Write a brief note on Crossbar Systems. Draw neat diagrams. [8]

3. a) In n stage Combination switching, a trade-off between blocking probability and
time delay is possible. Explain?
[8]
b) Explain Time division multiplexing. [8]

4. a) What are the factors that limit the length of subscribes loop? Discuss them. [8]
b) Explain in detail CCITT Signaling System no.7. [8]

5. a) What is the significance of Broadband Networks? Explain. [8]
b) Describe different traffic measurement units in Telecommunication Network. [8]

6. a) Explain in detail Sectionalized Switching Networks. [8]
b) What is Call Packing? Explain. [8]

7. a) Explain the difference between ISDN and BISDN. [8]
b) Write short notes on Transmission Channels. [8]

Code No: QT41042
Set No. 1
R13
1 of 1