B.Tech. DEGREE EXAMINATION - IF 251 — TELECOMMUNICATION SWITCHING TECHNIQUES

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vedha.v

      
MODEL 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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