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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
Classifications of Communication Systems
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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
Classifications of Communication Systems
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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
Classifications of Communication Systems
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
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