Kannur University 2011-3rd Sem B.Tech Vester Engineering (Reg./Supple./Imp.) Including Part Time ,, PT 2K6 /2K6 EC 805(c) : COMMUNICATION SWITCHING SYSTEM - Question Paper

VIII Semester B.Tech. Engineering Degree (Reg./Supple./Imp.) Including Part Time Degree Examination, April 2011

(2007 Admin.)

Electronics and Communication


PT 2K6 /2K6 EC 805(c) : COMMUNICATION SWITCHING SYSTEM


Time: three Hours Max. Marks: 100


ans all questions.


1. discuss distributed stored program control with the help of a neat diagram. [Marks 5]

2. obtain an expression for blocking probability of a two-stage TS switch. [Marks 5]

3. discuss with a neat block diagram a 3 stage STS switch. [Marks 5]

4. discuss with a neat block diagram a 2 stage STS switch. [Marks 5]

5. write a note on GOS and blocking probability. [Marks 5]

6. Write B-D equations and discuss all the terms in these equations. [Marks 5]

7. discuss the basic scheme for CCS signalling with a neat diagram. [Marks 5]

8. discuss the typical CCS signalling message formats with diagram.[Marks 5]


ans the subsequent 15 marks ques..


1. A) discuss the basic time division space switching with a neat diagram of a
output controlled time division space switch. [Marks 15]

OR

1. B) discuss the principle of time slot interchange with a neat diagram.[Marks 15]


2. A) Discribe the call processing structure of AT & T 5ESS switch with a neat diagram. [Marks 15]

OR

2. B) discuss the BD process. Derive steady state equations for BD process.[Marks 15]


3. A) Derive the poisson arrival process formula starting from BD process equations.[Marks 15]

OR

3. B) Show that the blocking probability tends to zero assuming infinite sources in LCC model.[Marks 15]


4. A) discuss the various kinds of inchannel signalling.[Marks 15]

OR

4. B) discuss SS7 architecture along with its all formats of signalling units.[Marks 15]

Earning:   Approval pending.