Deemed University 2009 A.M.I.E.T.E Electronics & Communication Engineering Telecommunication systems – et/it (old scheme) - Question Paper

AMIETE – ET/IT (OLD SCHEME)

Code: AE17 / AT17 Subject: TELECOMMUNICATION SYSTEMS
Time: three Hours Max. Marks: 100

NOTE: There are nine ques. in all.
· ques. one is compulsory and carries 20 marks. ans to Q. 1. must be written in the space given for it in the ans book supplied and nowhere else.
· Out of the remaining 8 ques. ans any 5 ques.. every ques. carries 16 marks.
· Any needed data not explicitly given, may be suitably presumed and said.


Q.1 select the accurate or the best option in the following: (210)

a. The traffic in a telecommunication network is measured by an
internationally accepted unit known as

(A) Erlang. (B) Hertz.
(C) Decibel. (D) None of the above.

b. Step by step switching system is a

(A) direct control system. (B) indirect control system.
(C) hybrid control system. (D) None.

c. The process of 1st compressing and then expanding is referred to as

(A) encoding. (B) modulation.
(C) companding. (D) None of the above.

d. Delay systems are sometimes known as

(A) 1st line theory. (B) 2nd line theory.
(C) waiting line theory. (D) None of the above.

e. Loss formula is also called as

(A) Erlang A formula. (B) Erlang B formula.
(C) Erlang C formula. (D) Erlang D formula.

f. A combined modulator/demodulator unit is called

(A) CODEC. (B) EPABX.
(C) MODEM. (D) None.

g. PSTN stands for

(A) Public Switched Telephone Network.
(B) Private System Transmission Network.
(C) Private Subscriber Telephone Network.
(D) Public Switched Transmission Network.

Earning:   Approval pending.