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Posted By: b.thirumaya prabhu Member Level: Gold Posted Date: 22 May 2008
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2007 Anna University B.Tech B.Tech Information Technology TELECOMMUNICATION SWITCHING TECHNIQUES '07 Question paper
B.Tech. DEGREE EXAMINATION.
Fourth Semester
Information Technology
IF 251 — TELECOMMUNICATION SWITCHING TECHNIQUES
Time : Three hours Maximum : 100 marks
Answer ALL questions.
PART A — (10 ´ 2 = 20 marks)
1. What are the four fundamental functions of a switching system?
2. What do you mean by step by step switching?
3. Define Time Switch.
4. Draw the schematic of a PSTN and distinguish it from ISDN.
5. Draw the architecture of SS N07 protocol.
6. Define grade of service.
7. Write down the specifications of the TDM frame of a T1 carrier.
8. What is the fundamental method for synchronising a transmitter and receiver?
9. What are the features of a connection oriented protocol?
10. Define Time Division Multiple Access.
PART B — (5 ´ 16 = 80 marks)
11. With a neat diagram describe a cross bar switching system.
12. (a) Describe a digital switching system generic hardware.
Or
(b) Describe a digital switching system software.
13. (a) Describe the common channel signalling scheme.
Or
(b) Show that the telephone traffic is modelled as a poisson process.
14. (a) Describe FDM transmission system and crosstalk.
Or
(b) Describe a three stage switching network.
15. (a) Describe ISO–OSI reference architecture.
Or
(b) Describe a satellite based data network.
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