vision mission of college · communication process. 1,3,7 c601 .6t students can explain [bt- 2] the...

Vision Mission of College

Vision

To be a centre of excellence for developing quality technocrats

with moral and social ethics, to face the global challenges for the

sustainable development of society.

Mission To create Conducive academic culture for learning and identifying

career goals.

To impart quality technical education along with research

opportunities.

To impart knowledge and generate entrepreneurship skills

contributing to the socio-economic growth of the Nation.

To inculcate values and skills, that will empower our students,

towards National development through technology and preserve

nature and its resources.

Vision Mission of Program (i.e Department)

Vision

We endeavour to impart quality education and provide intellect

and competent engineers, equipped to meet the standards of

changing International Technical Scenario.

Mission

Our mission is to provide value based technical education and to

mould the character of the younger generation, through a

synthesis of Science & Spirituality, so that their earnest endeavour

to achieve prosperity in life is matched by an ardent desire to

extend selfless service to the society, each complementing the

other.

B. E. Sixth Semester

(Electronics & Telecommunication Engg)

TELECOMMUNICATION SWITCHING SYSTEMS College Assessment: 20 Marks University Assessment: 80 Marks Subject Code: BEETE601T

Unit 1: Telecommunication Switching Systems Principles of manual switching system: - electronic telephone, local and central battery system, trunk

exchange, junction working. Automatic telephony: Strowger exchange, line switches and selectors, ringing and tone circuit,

subscriber uniselector circuit, trunking diagram, cross bar switching system.

Message switching, Circuit switching, manual switching and Electronic Switching. Digital switching:

Switching functions, space division switching, time division switching, two dimensional switching, digital

cross connect systems, digital switching in an analog environment.

Unit 2: Telecommunication Traffic Unit of Traffic, Traffic measurement, a mathematical model, Lost- call systems: Theory, traffic

performance, loss systems in tandem.

Queuing systems: Erlang Distribution, probability of delay, Finite queue capacity, systems with a single

server, Queues in tandem, delay tables and application of Delay formulae.

Analysis: Traffic Characteristics: Arrival Distributions, Holding time Distribution. Loss Systems: Lost

calls cleared, lost calls returning, lost calls Held, lost calls cleared.

Unit 3: Switching Networks Single Stage Networks, Gradings: Principle, Design of progressive grading, other gradings, Traffic

capacity of gradings, Applications of gradings. Link Systems: General, Two stage networks, three stage networks.Grades of service of link systems:

General, Two stage networks, three stage networks, Call packing, Rearrangeable networks, Strict

sense non blocking networks, Sectionalized switching networks Control of Switching Systems:

Call processing Functions: Sequence f operations, Signal exchanges, State transition diagrams.

Common Control, Reliability, Availability and Security.

Unit 4: Network Synchronization and Management Timing: Timing Recovery, Clock Instability, Elastic Stores, Jitter measurements, systematic jitter.

Timing Inaccuracy: Slips, Asynchronous Multiplexing, Waiting time jitter.

Network Synchronization: Plesiochronous, pulse stuffing, mutual synchronization, Network master,

Master – Slave synchronization, Hierarchical synchronization Processes. Network management:

Routing control, Flow control.

Unit 5: Networks Data Networks: Data Transmission in PSTN, Data Communication Architecture, Link to link layers,

End to End layers, Satellite based Data networks, LANs, MANs, Fiber optic networks, Data network

Standards, Protocol stacks, Interworking. Integrated Services

Digital Networks: ISDN, Network and protocol Architecture, Transmission Channels, User network

interfaces, signaling, Numbering and Addressing, ISDN Standards, Broadband ISDN, Voice Data

Integration

Unit 6: Cellular Telephone Concepts Mobile telephone services, cellular telephone, Frequency reuse, Interference, Cellular System topology, Roaming and handoffs, Cellular telephone network components, Cellular telephone

calls processing. Cellular Telephone systems: Digital cellular telephone.

Books:

Textbooks: 1) J. E. Flood, “Telecommunications Switching, Traffic and Networks”, Pearson Education

2) John C. Bellamy, “Digital Telephony”, Third Edition; Wiley Publications

3) Thiagarajan Vishwanathan, “Telecommunication Switching Systems and Networks”; PHI

Publications

4) Wayne Tomasi, “Electronic Communications Systems”; 5th Edition; Pearson Education

Reference Books: 1) P.Gnanasivam,”Telecommunication Switching and Networks.

2) Rappaport,”Wireless communication”

3) Tannenbaum”Data communication and networks” 4th Edition,TMH

Anjuman College of Engineering & Technology Electronics & Telecommunication Engineering Programme

Subject: Telecommunication & Switching System (THEORY) Semester/Year: Sixth Semester/ Third Year

Subject Code: BEETE601T

COURSE OUTCOMES

After completing this course students will be able to:

CO Outcomes PO Remark

C601.1T Students can Compare [BT-1] the manual & automatic telephony systems & able to

answer what is Switching system is & can Explain [BT-2] the different types of

switching system which was used earlier in line communication. 1

C601.2T Students will be able to Identify [BT-3] the problems related to telecommunication

traffic & can organize, solve the traffic related issue to improve the G.O.S of

Telecommunication system. 1,2,3,4,7

C601.3T Students can Explain [BT-2] the principle of gradings used in networking of

telecommunication system along with call processing function & various types of

signal used in telecommunication system. 1,3,6,7

C601.4T Students will be able to Explain [BT-2] how Synchronization of Telecomm.

Network and Network management can be possible in Telecomm. Systems. 1,7

C601.5T Students will be able to Explain [BT-2] different types of network used for data

communication process. 1,3,7

C601.6T Students can Explain [BT-2] the basic terminology related to designing of cellular

communication system & will be able to extend the knowledge for channel

allocation process in cellular communication system. 1,3,7,9,10,12

Course In- Charge

Prof. Akbar Nagani

Reviewer

Head Programme, ETC

Prof. M. Nasiruddin

CO-PO Mapping Matrix

Academic Year:-2017-2018 Year/Semester: 3rd

/6th

Sem

COURSE – TELECOMMUNICATION & SWITCHING SYSTEMS

Course Code – BEETE601T

Name of Faculty – Prof. AKBAR NAGANI

CO/PO PO1 PO2 PO3 PO4 PO5 PO6 PO7 PO8 PO9 PO10 PO11 PO12 PSO1 PSO2 PSO3

C309.1 2 -- -- -- -- -- -- -- -- -- -- --

C309.2 2 2 2 1 -- -- 1 -- -- -- -- --

C309.3 2 -- 1 -- -- 1 1 -- -- -- -- --

C309.4 2 -- -- -- -- -- 1 -- -- -- -- --

C309.5 2 -- 1 -- -- -- 2 -- -- -- -- --

C309.6 2 -- 2 -- -- -- 1 -- 3 3 -- 2

Correlation levels 1, 2 or 3 as defined below

1: Slight (Low)

2: Moderate (Medium)

3: Substantial (High)

COURSE IN-CHARGE

Reviewer

HEAD, PROGRAMM

Prof. AKBAR NAGANI

M. NASIRUDDIN

LIST OF PROGRAMME OUTCOMES GIVEN BY NBA

a. Engineering Knowledge: Apply the knowledge of mathematics, science, engineering

fundamentals, and an engineering specialization to the solution of complex engineering

problems.

b. Problem analysis: Identify, formulate, research literature, and analyses complex

engineering problems reaching substantiated conclusions using first principles of

mathematics, natural sciences, and engineering sciences.

c. Design/ Development of Solutions: Design solutions for broadly- defined

engineering/technology problems and contribute to the design of systems, components or

processes to meet specified needs with appropriate consideration for public health and safety,

cultural, societal, and environmental considerations.

d. Conduct investigations of complex problems: Use research-based knowledge and

e. Research methods including design of experiments, analysis and interpretation of data, and

f. Synthesis of the information to provide valid conclusions.

g. Modern Tool Usage: Create, select, and apply appropriate techniques, resources, and

modern engineering and IT tools including prediction and modelling to complex engineering

activities with an understanding of the limitations.

h. The Engineer and Society: Apply reasoning informed by the contextual knowledge to

assess societal, health, safety, legal, and cultural issues and the consequent responsibilities

relevant to the professional engineering practice.

i. Environment and Sustainability: Understand the impact of the professional

engineering solutions in societal and environmental contexts, and demonstrate the

knowledge of need for sustainable development.

j. Ethics: Apply ethical principles and commit to professional ethics and responsibilities and

norms of the engineering practice.

k. Individual and Team Work: Function effectively as an individual, and as a member or

leader in diverse teams, and in multidisciplinary settings.

l. Communication: Communicate effectively on complex engineering activities with the

engineering community and with society at large. Some of them are, being able to

comprehend and write effective reports and design documentation, make effective

presentations, and give and receive clear instructions.

m. Project Management and Finance: Demonstrate knowledge and understanding of

the engineering and management principles and apply these to one’s own work, as a member

and leader in a team, to manage projects and in multidisciplinary environments.

n. Lifelong learning: Recognize the need for, and have the preparation and ability to engage

in independent and lifelong learning in the broadest context of technological change.

Anjuman College of Engineering & Technology Sadar, Nagpur

Department of Electronics & Telecommunication Engineering

Question Bank of UNIT-I

VI SEM Telecommunication & Switching Systems.

Question from University Examination from (Sum-15 to Win-17)

Q1.1) Describe the different tones used in automatic exchange. (W-17, S-15)

Q1.2) Draw & explain the trunking diagram of 1000 line exchange. (W-17,

S-17, 16, 15)

Q1.3) Differentiate between local battery & central battery system. (W-17,

16)

Q1.4) Draw & explain uniselector & two motion selector used in strowger

Exchange. (W-17, 15, S-16)

Q1.5) Draw & Explain Crossbar switching system in Details. (W-17, 16, 15)

Q1.6) What is crossbar switching system? Explain the principle of crossbar

Switching system, give the advantages of crossbar system over

strowger System. (S-17, 15)

Q1.7) Describe Manual Switching in details. (S-17)

Q1.8) Explain digital cross connect systems with neat diagram. (S-17, 16)

Q1.9) Explain central battery exchange. (S-17)

Q1.10) Explain with neat sketch strowger exchange. (W-16)

Q1.11) what do you mean by switching system? Give classification of same.

(W-16, S-15)

Q1.12) Differentiate between space division switching & time division

switching. (W-16)



Q1.13) Draw & explain ringing circuit as used in telephone system. (W-16)

Q1.14) Explain in detail Two Dimensional Switching. (S-16, W-15)

Q1.15) List & explain four limitations of manual switching system. (S-16)

Q1.16) Write Short Notes on: - (W-15)

i) Message Switching.

ii) Circuit Switching.

Q1.17) Write Short Notes on: - (S-15)

i) Time division Switching.

ii) Space division Switching.



Question Bank of UNIT-II



Q2.1) Derive the Erlang’s second distribution formula for the Queueing

systems. (W-17,)

Q2.2) Explain the following terms related with the traffic Engineering.

(W-17, 15)

i) Busy Hour

ii) Busy Hour Call Attempts (BCHA)

iii) Busy hour Calling Rate

iv) Holding time.

Q2.3) Explain mathematical model of traffic. (W-17,16,S-15)

Q2.4) A group of 20 trunks provides a grade of service of 0.01 when offered

12E of traffic.

i) How much is the grade of service improved if one extra trunk is added

to the group?

ii) How much does the grade of service deteriorate if one trunk is out of

service? (W-17,)

Q2.5) During the busy hour 1200 calls were offered to a group of trunks and

six calls were lost.The average call duration was 3 minutes. Find:-

i) The traffic offered (S-17,16,15, W-15)

ii) The traffic carried

iii) The traffic lost

iv) The grade of service

v) The total duration of the periods of congestion.

Q2.6) Explain lost call system. (S-17,16)



(S-16,) What is traffic engineering. .14) Q2

16)-(W What is probability of delay? How can it be overcome? .13)Q2

16)-(W switching.

Differentiate between space division switching & time division .12) Q2

16)-(W measurement.

What is the unit of traffic? Explain Erlang distribution for traffic .11) Q2

16)-(W Explain traffic characteristics used in telephony. .10) Q2

15)-,W17-(S

Explain effect of various parameters on traffic performance..9)Q2

,)17-(S Queues in tandemWrite a short note on Q2.8)

Grade of Service. ii)

Busy Hour. i)

) 17-(S Define the following terms..7) Q2

A group of 5 trunks is offered 2E Traffic find:- .15) Q2

i) The grade of service (GOS).

ii) The probability that only one trunk is busy.

iii) The probability that only one trunk is free.

iv) The probability that atleast one trunk is free. ( W-15)

Q .2 16) Explain the Queuing system ? (S-15)

Q .2 17) A PBX has three operators on duty and receives 400 calls during the

busy hours. Incoming calls enter a queue and are dealt with in order of

arrival. The average time taken by an operator to handle a call is 18 sec.Call

arivals are poissonian and operator service times have a negative

exponential distribution:



i) What percentage of calls have to wait for an operator to answer them?

ii) What is average delay,for all calls and for those which encounter delay?

iii) What percentage of calls are delayed for more than 30 sec. (S-15)

Question Bank of UNIT-I II VI SEM Telecommunication & Switching Systems.

Question from University Examination from (S um-15 to Win -17)

Q3.1) Explain various call processing functions. (W-17, 16, S-17,16)

Q3.2) Explain various signal exchanges for making local calls. (W-17, 15,S- 15)

Q3.3) Explain principle of grading with the help of suitable diagram.

(W-17, 16, S-15) Q3.4) Explain single stage network in details. (W-17,15,S-16)

Q3.5) Explain principle of gradings with the help of suitable diagrams.

(S-17,16,15)

Q3.6) Explain call packing in switching network. (S-17,16,W-15)

Q3.7) Explain the following terms Relaibility, Availability, & Security with

Respect to switching systems. (S-17)

Q3.8) with the help of 3-stage network explain link system. (W-16,)

Q3.9) State & Explain transition diagram of signal exchanges. (W-16,)

Q3.10) explain the terms: - (W-16,)

i) Grade of service (GOS).

ii) Relaibility of calls.

iii) Non-blocking Networks.



Q3.11) Give various application of gradings. (W-15)

Q3.12) Explain grade of service for two stage network. (W-15)

Q3.13) Explain link system with two stage network. (S-15)

Question Bank of UNIT-IV



Q4.1) Write short notes on:-

i) Jitter

ii) Elastic stores

iii) Clock instability. (W-17,16,15,S-16)

Q4.2) Explain network synchronization in detail. List different approaches

used in synchronizing a digital network (W-17,16,S-17,16,15)

Q4.3) Write short notes on Network Control’. (W-17,S-15)

Q4.4) Explain Asynchronous Multiplexing. (W-17,)

Q4.5) Explain timming recovery, phase lock loop in network. (S-17,)

Q4.6) Write short notes on: - (S-17,)

i) Jitter Measurements

ii) The concept of pulse stuffing with example. (S-17,)

Q4.7) what is network management? Give its two considerations. (S-17)

Q4.8) what is slips? Explain asynchronous multiplexing. (W-16,15)



Q4.9) Explain routing control & flow control in network management. (W- 16,)

Q4.10) Explain Clock instability. List the sources of clock instability in a

network (S-16,W-15)

Q4.11) Write short notes on master slave synchronization. (S-16,W-15)

Q4.12) Explain how routing control plays an important role of network

management. (S-15)

Q4.13) Explain circuits of jitter measurements. (S-15)

Question Bank of UNIT-V VI SEM Telecommunication & Switching Systems.

Question from University Examination from (S um-15 to Win -17)

Q5.1) Explain satellite communication in detail. (W-17, 15, S-16)

Q5.2) Draw & explain the ISDN Architecture. (W-17, 15, S-16)

Q5.3) Explain the ISO-OSI model with neat layered diagram.

(W-17,16, S-17,16,15)

Q5.4) What is PSTN? How data can be communicated with the help of PSTN.

(W-17,)

Q5.5) Explain Data Communication Architecture. (S-17,)


i) Protocol stacks

ii) Internetworking .

Q5.7) What is ISDN? Describe a typical ISDN arrangement giving simple block

) 17-(S Diagram.




i) Transmission channels in ISDN.

ii) Concept of broadband ISDN.

Q5.9) Explain Satellite based data networks. (W-16,)

Q5.10) Explain with the help of diagrams the concept of ISDN. (W-16)

Q5.11) What is PSTN? How data can be communicated with the help of PSTN.

(W-16)

Q5.12) Explain Lan with the help of suitable diagram (W-16)

Q5.13) Explain Internetworking. Also give significance of Internetworking.

(S-15,W-15)

Q5.14) Classify various layers of OSI model into Link to Link layer & end to end

layer. (W-15)

Q5.15) Explain various MAC protocols for satellite Link. (S-15)

Q5.16) Describe IN channel signalling and common channel signalling. (S-15)

Q5.17) Give basic concept of ISDN. (S-15)



Question Bank of UNIT-VI



Q6.1) Explain about roaming & hand-off in details. (W-17, S-15)

Q6.2) if a total 33MHz of bandwidth is allocated to a particular FDD cellular

Telephone system which uses two 25 KHz simplex channels to provide

full duplex voice & control channels. Compute the number of channels

available per cell if a system uses.

i) Four cell-reuse

ii) Seven cell-reuse

iii) 12 cell-reuse. (W-17, 15 , S-17,16,15)

Q6.3) Explain in details about cellular telephone system. (W-17,16,15 S-

16,15)

Q6.4) Explain in details about Frequency Reuse. (W-17, S-17)

Telephone system which uses two 28 KHz simplex channels to provide

if a total 50 MHz of bandwidth is allocated to a particular FDD cellular Q6.6)

)15, W-17-(S Explain interferences in cellular system. Give its types..5)Q6

)16-(W cell-reuse.12 iii)

Seven cell-reuse ii)

Four cell-reuse i)

Available per cell if a system uses.

Full duplex voice & control channels. Compute the number of channels



Q6.7) List & describe the six essential components of a cellular telephone

Network. (S-17)

Q6.8) Write short notes on: - (W-16, 15 S-16)

i) Roaming & Hand-offs.

ii) Frequency Reuse.

Q6.9) Explain cellular telephone network components. (W-16,)

Q6.10) Explain Co-channel interference in cellular system. Also explain Co-

Channel reuse ratio. (S-16)

Q6.11) Explain how a call to a mobile user initiated by a landline subscriber is

Established. (S-15)



Question Bank for CAT-I Exam


UNIT-I:- Telecommunication Switching Systems

1) Draw & explain the trunking diagram of 1000 line exchange.

2) Draw & explain uniselector & two motion selector used in strowger

Exchange.

3) What is crossbar switching system? Explain the principle of crossbar

Switching system, give the advantages of crossbar system over strowger

System

4) Write Short Notes on: -

i) Message Switching.

ii) Circuit Switching.

5) Describe the different tones used in automatic exchange.

6) Explain digital cross connect systems with neat diagram.

7) Differentiate between local battery & central battery system.

8) Write Short Notes on: -

i) Time division Switching.

ii) Space division Switching.

___________________________________________________________________________________________



UNIT-II:- Telecommunication Traffic

1) Derive the Erlang’s second distribution formula for the Queueing systems.

2) A group of 20 trunks provides a grade of service of 0.01 when offered 12E

of traffic.

i) How much is the grade of service improved if one extra trunk is added to

the group?

ii) How much does the grade of service deteriorate if one trunk is out of

service?

3) During the busy hour 1200 calls were offered to a group of trunks and

six calls were lost.The average call duration was 3 minutes. Find:-

i) The traffic offered

ii) The traffic carried

iii) The traffic lost

iv) The grade of service

v) The total duration of the periods of congestion.

4) What is the unit of traffic? Explain Erlang distribution for traffic

measurement.

5) What is probability of delay? How can it be overcome?

6) A group of 5 trunks is offered 2E Traffic find:-

i) The grade of service (GOS).

ii) The probability that only one trunk is busy.

iii) The probability that only one trunk is free.

iv) The probability that at least one trunk is free.

7) Explain effect of various parameters on traffic performance.

__________________________________________________________________________________________



Question Bank for CAT-II Exam


UNIT-III:- Switching Networks

1) Explain various call processing functions.

2) Explain various signal exchanges for making local calls.

3) Explain call packing in switching network.

4) Explain the following terms Relaibility, Availability, & Security with Respect

to switching systems.

5) Explain link system with two stage network.

6) Explain principle of gradings with the help of suitable diagrams.

7) Explain single stage network in details.

__________________________________________________________________________________________

UNIT-IV: - Network Synchronization and Management

1) Write short notes on:-

i) Jitter

ii) Elastic stores

iii) Clock instability.

iv) The concept of pulse stuffing with example.

2) Explain network synchronization in detail. List different approaches used in

synchronizing a digital network.

3) What is slips? Explain asynchronous multiplexing.

4) Explain Clock instability. List the sources of clock instability in a network.

5) Explain routing control & flow control in network management.

6) Write short notes on master slave synchronization.

____________________________________________________________________________________

Anjuman College of Engineering & Technology Electronics & Telecommunication Engineering Programme

Subject: Telecommunication Switching Systems.

Sem: VIth B

Session: 2017-18

Assignment Sheet

Assig No.

Topic Announcement Date

Submission Date

Teacher Signature

Remark

1 Solve the University question of Unit-1




Course In-Charge

Akbar Nagani

vision mission of college · communication process. 1,3,7 c601 .6t students can explain [bt- 2] the...

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