Lecture 1 Telephone Engineering

8/2/2019 Lecture 1 Telephone Engineering

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Telephone Engineering

By

Dr. Ali Allam


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PROFESSOR CONTACT INFORMATION

Name: Ali Allam, Assistant Professor

Phone Number: 0100-6161707

Office Location: At Third Floor Office Hours: 10:00 am 12:00 am, Tuesday

Email Address: [email protected]


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COURSE DESCRIPTION

The objective of this course is to introduce the

student to switching and transmission as

applied within the telecommunications

infrastructure. The material to be discussed

during this course will include the background

and terminology of telecommunications,

digital switching, network synchronization,control and management.


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STUDENT LEARNING

OBJECTIVES/OUTCOMES

1. Ability to analyze the characteristics of the

telephone systems.

2. Ability to make use of the parameters in

designing telephone switches.

3. Ability to analyze the performance of a digital

telephone switch.

4. Ability to analyze network synchronization

and network management.


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References

Mandatory Textbooks

P. Gnanasivam Telecommunications Switching and Networks ,

New Age International (P) Publishers, First Edition 2005, ISBN:81-

224-1583-0

J. R. Boucher, Traffic System Design Handbook, IEEE Press,

1993.

Reference Books

A. S. Tanenbaum, Computer Networks, Forth Edition, Prentice

Hall, 2003.


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ScoreItem30Mid-term examination

90Final-term examination

30Lab. Examination

150Total

Grading Scheme


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Classifications of Communication Systems

Acc. to : Comm. System Hierarchy

Core Network

( Back bone )

Access

NetworkSwitching

Network

CircuitSwitchingNetwork

PacketSwitchingNetwork

- Country-wide

network- Gegabits

Capacity

- Linking

switching

sites DataNetwork

TelephoneNetwork

- Linking users to

switching sites (Lastmile problem)


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Acc. to : Comms. Channel (Media)

Guided Ch. UnguidedCh.

Copper

Cables

Optical

Fiber

Radio Band

(wireless)

Microwave

Terrestrial Satellite

- Twisted pair

-Co-axial

- Single mode cable

- Multi-mode cable

- Mobile

- Fixed (WLL)

- LOS

- NLOS

- Mobile

- Fixed



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Acc. to : The Information Type

( Modulation technique)

Analog

Transmission

Digital

Transmission

ASK FSK PSK

AM FM PM

Base BandBand Pass

TDM

(PCM)

WDMSS

DS FH



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Communication Engineering Courses

Basic

Courses

Signals &

systems

Comm.

Engineering

Comms.

Systems/

Network

Satellite

Telephony& TV

Mobile

Comms.

Theory

Info & Coding

Theory

Analog Comms.

Digital Comms.

Optic Fiber

ComputerComms.Network


Cryptography


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Elements of Communication Switching Systems

1. End System (Instruments)

2. Transmission System

3. Switching System

4. Signaling System


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Transmission System

Signals (Information) need to be transported from its source into its

destination. Hence, communication links are required. The communication link between two switching sites is called a

Trunk.

There are different types of communication systems depending on the

transmission media:

Unguided Ch.

CopperCables

OpticalFiber

Microwave

Terrestrial Satellite

Guided Ch.


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Transmission System (contd)


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Switching Systems

The function of a switching system is to receive the

messages, calls and control information, and forward it to

the required destination.

The switching system sets up a communication path

between any two communicating points.

In telephone networks the components of the switching

system are called the central offices (CO).

In telephone networks the switching method is called

Circuit Switching since a real 2 wire electrical circuit is

established between the two communicating points.


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Switching Systems (contd)

Auto

switch

Circuit Switching method

Autoswitch

Trunk

Two-wire physical path (circuit) between the 2 telephone sets

2-wireline2-wireline

CO CO


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Basic tasks of a signaling system are :

- Supervisorysignals (e.g. call set up and call monitor).

- Routing signals ( how to reach the called subscriber).

- Management signals (network status , billing, routing plans, traffic

overload, priorities and class of service).

Signaling provides an interface between national and

international switching systems.

Signaling information may share the communication linkswith the traffic information (In-band signaling ), or may

be assigned separate links (Common Channel Signaling

CCS).

Signaling System


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THANK YOU FOR YOUR ATTENTION

Lecture 1 Telephone Engineering

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