graphics courtesy of prof. d. dodds, univ. of saskatchewan 1 ee489 – telecommunication systems...
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Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Network ArchitectureNetwork Architecture
Customer terminals 20%
Outside plant, cables 29%
Switching equipment 25%
Multiplexing and Transmission equipment 15%
Buildings, land, other 11%
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Network TypesNetwork Types
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Trade-off Between Switching and Trade-off Between Switching and Transmission Costs in Network ArchitectureTransmission Costs in Network Architecture
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Trade-off Between Switching and Trade-off Between Switching and Transmission Costs in Network ArchitectureTransmission Costs in Network Architecture
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Network TypesNetwork Types
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Concept of a “Homing Plan”Concept of a “Homing Plan”
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Subscriber “Loop” Plant (N. Subscriber “Loop” Plant (N. America)America)
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Subscriber “Loop” Plant (UK)Subscriber “Loop” Plant (UK)
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Subscriber “Loop” PlantSubscriber “Loop” Plant
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Twisted Pair CableTwisted Pair Cable
Each change of 3 gauge numbers is a factor of 2 in wire area (cross section), this a factor of 2 in resistance / unit
length
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Inductive Loading - Inductive Loading - “Load Coils”“Load Coils”
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Inductive Loading Inductive Loading - - Lumped “Load Lumped “Load Coils”Coils”
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Effect on Transfer Function of Twisted PairEffect on Transfer Function of Twisted Pair
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Example Calculation of Cutoff Example Calculation of Cutoff FrequencyFrequency
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Subscriber Line SignallingSubscriber Line Signalling
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Address SignallingAddress Signalling
Dial Pulsing
Dual-Tone Multi-frequency (DTMF)
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
DTMF ReceiverDTMF Receiver
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
2-Wire to 4-Wire Conversion2-Wire to 4-Wire Conversion
•Any telephone call undergoes 2W-4W conversions:
- from the phone (4W) to the subscriber line (2W)
- from the subscriber line (2W) to the network interface (4W)
Overall structure of any phone connection
“2W”
“2W”
“4W”
“4W”
“4W”
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
2W to 4W conversion: The “Hybrid Coupler” 2W to 4W conversion: The “Hybrid Coupler”
CircuitCircuit
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
2W to 4W conversion: The “Hybrid Coupler” 2W to 4W conversion: The “Hybrid Coupler”
CircuitCircuit
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Electronic Hybrid CouplerElectronic Hybrid Coupler
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Concept of Hybrid Return Loss Concept of Hybrid Return Loss
Echo return loss (ERL) = average attention of power reflected at the 2W-4W interface
Singing Return Loss (SRL) = minimum attenuation to reflected power at any frequency
coming back from the 2W-4W interface
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
Psophometric and “C Weighting” Noise Psophometric and “C Weighting” Noise FiltersFilters
Graphics courtesy of Prof. D. Dodds , Univ. of Saskatchewan
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EE489 – Telecommunication Systems Engineering –University of Alberta, Dept. of Electrical and Computer Engineering
ExampleExample