Pondicherry University 2010 B.Tech Electronics and Communications Engineering Telecommunication switching techniques - Question Paper

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B.Tech. DEGREE EXAMINATION, APRIL 2010. Eighth Semester ECE

TELECOMMUNICATION SWITCHING TECHNIQUES

Time : Three hours Maximum : 75 marks

Answer FIVE questions choosing ONE full from each UNIT.

All questions carry equal marks.

UNIT I

1. How are switching system classified? Explain briefly about the cross bar exchange. (15)

Or

2. (a) What is the significances technique tone in a

telephone conversation? (?)

(b) Describe about the Echo suppressor and cancellers. (8)

Explain with a neat block diagram, the time division space switching. (15)

Or

Describe briefly about the software organisation and processing in digital switching. (15)

UNIT III

(a) Compare the in-channel and common channel signalling. (8)

(b) Explain grade of service and blocking probability. (7)

Or

Describe briefly about the principle of common channel signalling and also explain signalling network. (15)

UNIT IV Write short notes on :

(a) DSL (7)

(b) SDH/SONET. (8)

Or

Discuss briefly about the single stage and multistage network. (15)

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9. (a) Explain briefly about connection oriented

and connection less protocal. (8)

(b) Explain the functions of layers of OSI

architecture. (7)

Or

10. Write short notes on :

(a) TCP/IP Protocal (7)

(b) Satellite Based Data Network. * (8)

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