The Telephone Network. An Engineering Approach to Computer Networking
|
|
|
- Marjorie Ross
- 9 years ago
- Views:
Transcription
1 The Telephone Network An Engineering Approach to Computer Networking
2 Is it a computer network? Specialized to carry voice Also carries telemetry video fax modem calls Internally, uses digital samples Switches and switch controllers are special purpose computers Principles in its design apply to more general computer networks
3 Concepts Single basic service: two-way voice low end-to-end delay guarantee that an accepted call will run to completion Endpoints connected by a circuit like an electrical circuit signals flow both ways ( (full duplex) associated with bandwidth and buffer resources
4 The big picture Fully connected core simple routing telephone number is a hint about how to route a call but not for 800/888/700/900 numbers hierarchically allocated telephone number space
5 The pieces 1. End systems 2. Transmission 3. Switching 4. Signaling
6 1. End-systems Transducers Dialer Ringer key to carrying voice on wires Switchhook
7 Sidetone Transmission circuit needs two wires And so does reception circuit => 4 wires from every central office to home Canwedobetter? Use same pair of wires for both transmission and reception Cancel out what is being said Ergonomics: leave in a little sidetone unavoidable
8 Echo Shared wires => received signal is also transmitted And not completely cancelled out! Leads to echo (why?) OK for short-distance calls For long distance calls, need to put in echo chancellors (why?) Expensive Lesson keep end-to-end delays as short as possible
9 Dialing Pulse Tone sends a pulse per digit collected by central office key press (feep) sends a pair of tones = digit also called Dual Tone Mutifrequency (DTMF)
10 2. Transmission Link characteristics information carrying capacity (bandwidth) information sent as symbols 1 symbol >= 1 bit propagation delay time for electromagnetic signal to reach other end light travels at 0.7c in fiber ~8 microseconds/mile NYtoSF=>20ms;NYtoLondon=>27ms attenuation degradation in signal quality with distance long lines need regenerators optical amplifiers are here
11 Transmission: Multiplexing Trunks between central offices carry hundreds of conversations Can t run thick bundles! Instead, send many calls on the same wire multiplexing Analog multiplexing bandlimit call to 3.4 KHz and frequency shift onto higher bandwidth trunk obsolete Digital multiplexing first convert voice to samples 1sample=8bitsofvoice 8000 samples/sec => call = 64 Kbps
12 Transmission: Digital multiplexing How to choose a sample? 256 quantization levels logarithmically spaced (why?0 sample value = amplitude of nearest quantization level two choices of levels (mu law and A law) Time division multiplexing trunk carries bits at a faster bit rate than inputs n input streams, each with a 1-byte buffer output interleaves samples needtoserveallinputsinthetimeittakesonesampletoarrive => output runs n times faster than input overhead bits mark end of frame (why?)
13 Transmission: Multiplexing Multiplexed trunks can be multiplexed further Need a standard! (why?) US/Japan standard is called Digital Signaling hierarchy (DS) Digital Signal Number Number of previous level circuits Number of voice circuits Bandwidth DS Kbps DS Mbps DS Mbps DS Mbps
14 Transmission: Link technologies Many in use today twisted pair coax cable terrestrial microwave satellite microwave optical fiber Increasing amount of bandwidth and cost per foot Popular fiber satellite
15 Thecostofalink Should you use the cheapest possible link? No! Cost is in installation, not in link itself Builders routinely install twisted pair (CAT 5), fiber, and coax to every room Even if only one of them used, still saves money Long distance overprovision by up to ten times
16 Transmission: fiber optic links Wonderful stuff! lots of capacity nearly error free very little attenuation hard to tap A long thin strand of very pure glass
17 More on fibers Three types step index (multimode) graded index (multimode) single mode Multimode cheap use LEDs short distances (up to a few kilometers) Single mode expensive use lasers long distances (up to hundreds of kilometers)
18 Transmission: satellites Long distances at high bandwidth Geosynchronous 36,000 km in the sky up-down propagation delay of 250 ms bad for interactive communication slots in space limited Nongeosynchronous (Low Earth Orbit) appear to move in the sky need more of them handoff is complicated e.g. Iridium
19 3. Switching Problem: each user can potentially call any other user can t have direct lines! Switches establish temporary circuits Switching systems come in two parts: switch and switch controller
20 Switching: what does a switch do? Transfers data from an input to an output many ports (up to200,000 simultaneous calls)` need high speeds Some ways to switch: space division if inputs are multiplexed, need a schedule (why?)
21 Switching Another way to switch time division (time slot interchange or TSI) also needs a schedule (why?) To build larger switches we combine space and time division switching elements
22 4. Signaling Recall that a switching system has a switch and a switch controller Switch controller is in the control plane does not touch voice samples Manages the network call routing (collect dialstring and forward call) alarms (ring bell at receiver) billing directory lookup (for 800/888 calls)
23 Signaling network Switch controllers are special purpose computers Linked by their own internal computer network Common Channel Interoffice Signaling (CCIS) network Earlier design used in-band tones, but was severely hacked Also was very rigid (why?) Messages on CCIS conform to Signaling System 7 (SS7) spec.
24 Signaling One of the main jobs of switch controller: keep track of state of every endpoint Key is state transition diagram
25 Cellular communication Mobile phone talks to a base station on a particular radio frequency Aren t enough frequencies to give each mobile a permanent frequency (like a wire) Reuse temporal if mobile is off, no frequency assigned to it spatial mobiles in non-adjacent cells canusethesamefrequency
26 Problems with cellular communication How to complete a call to a mobile? need to track amobile on power on, mobile tells base of its ID and home callstohomeareforwardedtomobileoverccis How to deal with a moving cell phone? nearest base station changes need to hand off existing call to new base station a choice of several complicated protocols
27 Challenges for the telephone network Multimedia simultaneously transmit voice/data/video over the network people seem to want it existing network can t handle it bandwidth requirements burstiness in traffic (TSI can t skip input) change in statistical behavior Backward compatibility of new services huge existing infrastructure idiosyncrasies Regulation stifles innovation
28 Challenges Competition future telephone networks will no longer be monopolies how to manage the transition? Inefficiencies in the system an accumulation of cruft special-purpose systems of the past legacy systems need to change them without breaking the network
The Telephone Network
The Telephone Network An Engineering Approach Ref: Digital Telephony (John Bellamy) and Fundamentals of Telecommunications (R. L. Freeman) Introduction to Telecommunications Network Engineering (Second
Fundamentals of Telecommunications
Fundamentals of Telecommunications Professor of CIS Columbus, OH 43210 [email protected] http://www.cis.ohio-state.edu/~jain/ 1 Overview Time Division Multiplexing T1, T3, DS1, E1 T1 Framing Echo Cancellation
Multiplexing. Multiplexing is the set of techniques that allows the simultaneous transmission of multiple signals across a single physical medium.
Multiplexing Multiplexing is the set of techniques that allows the simultaneous transmission of multiple signals across a single physical medium. The following two factors in data communications lead to
(Refer Slide Time: 2:10)
Data Communications Prof. A. Pal Department of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture-12 Multiplexer Applications-1 Hello and welcome to today s lecture on multiplexer
Three Network Technologies
Three Network Technologies Network The largest worldwide computer network, specialized for voice ing technique: Circuit-switching Internet The global public information infrastructure for data ing technique:
Computers Are Your Future. 2006 Prentice-Hall, Inc.
Computers Are Your Future 2006 Prentice-Hall, Inc. Computers Are Your Future Chapter 3 Wired and Wireless Communication 2006 Prentice-Hall, Inc Slide 2 What You Will Learn... ü The definition of bandwidth
Introduction, Rate and Latency
Introduction, Rate and Latency Communication Networks Why communicate? Necessary to support some application. Example Applications Audio communication Radio, Telephone Text communication Email, SMS (text
Data Transmission. Data Communications Model. CSE 3461 / 5461: Computer Networking & Internet Technologies. Presentation B
CSE 3461 / 5461: Computer Networking & Internet Technologies Data Transmission Presentation B Kannan Srinivasan 08/30/2012 Data Communications Model Figure 1.2 Studying Assignment: 3.1-3.4, 4.1 Presentation
Module 5. Broadcast Communication Networks. Version 2 CSE IIT, Kharagpur
Module 5 Broadcast Communication Networks Lesson 1 Network Topology Specific Instructional Objectives At the end of this lesson, the students will be able to: Specify what is meant by network topology
INTRODUCTION TO COMMUNICATION SYSTEMS AND TRANSMISSION MEDIA
COMM.ENG INTRODUCTION TO COMMUNICATION SYSTEMS AND TRANSMISSION MEDIA 9/6/2014 LECTURES 1 Objectives To give a background on Communication system components and channels (media) A distinction between analogue
Network Technologies
Network Technologies Telephone Networks IP Networks ATM Networks Three Network Technologies Telephone Network The largest worldwide computer network, specialized for voice ing technique: Circuit-switching
Multiplexing on Wireline Telephone Systems
Multiplexing on Wireline Telephone Systems Isha Batra, Divya Raheja Information Technology, Dronacharya College of Engineering Farrukh Nagar, Gurgaon, India ABSTRACT- This Paper Outlines a research multiplexing
Analog vs. Digital Transmission
Analog vs. Digital Transmission Compare at two levels: 1. Data continuous (audio) vs. discrete (text) 2. Signaling continuously varying electromagnetic wave vs. sequence of voltage pulses. Also Transmission
Overview of the Telecommunications Network
1 Overview of the Telecommunications Network 15 Telecommunication Networks 2 Basic purpose of a telecommunications network: transmit user information in any form to another user of the network. Many forms
Introduction to Communication Networks Spring 2007. Unit 5 Switching Principles
Introduction to Communication Networks Spring 2007 Unit 5 Switching Principles Acknowledgements slides comming from: Data and Computer Communication by Wiliam Stallings (our supplementary textbook) numerous
Module 5. Broadcast Communication Networks. Version 2 CSE IIT, Kharagpur
Module 5 Broadcast Communication Networks Lesson 9 Cellular Telephone Networks Specific Instructional Objectives At the end of this lesson, the student will be able to: Explain the operation of Cellular
Chapter 4 Connecting to the Internet through an ISP
Chapter 4 Connecting to the Internet through an ISP 1. According to Cisco what two things are essential to gaining access to the internet? a. ISPs are essential to gaining access to the Internet. b. No
Telecommunications, Networks, and Wireless Computing
Objectives Telecommunications, Networks, and Wireless Computing 1. What are the features of a contemporary corporate telecommunications system? On what major technology developments are they based? 2.
How To Get A Phone In The United States
Telephone Systems COMP476 Home Telephones Plain Old Telephone Service (POTS) provides a twisted pair connection from your phone to the central office. You own your home wiring and the telephone company
FIBER OPTIC COMMUNICATIONS. Optical Fibers
FIBER OPTIC COMMUNICATIONS Optical Fibers Fiber optics (optical fibers) are long, thin strands of very pure glass about the size of a human hair. They are arranged in bundles called optical cables and
2. What is the maximum value of each octet in an IP address? A. 128 B. 255 C. 256 D. None of the above
1. How many bits are in an IP address? A. 16 B. 32 C. 64 2. What is the maximum value of each octet in an IP address? A. 128 B. 255 C. 256 3. The network number plays what part in an IP address? A. It
R2. The word protocol is often used to describe diplomatic relations. How does Wikipedia describe diplomatic protocol?
Chapter 1 Review Questions R1. What is the difference between a host and an end system? List several different types of end systems. Is a Web server an end system? 1. There is no difference. Throughout
Physical Layer. Communication Satellites. ECE 453 Introduction to Computer Networks. Lecture 3 Physical Layer II
ECE 453 Introduction to Computer Networks Lecture 3 Physical Layer II 1 Physical Layer Services transmit bits from sender to receiver. Transmission media Guided: twisted pair, coax, fiber Unguided (wireless):
EECC694 - Shaaban. Transmission Channel
The Physical Layer: Data Transmission Basics Encode data as energy at the data (information) source and transmit the encoded energy using transmitter hardware: Possible Energy Forms: Electrical, light,
It explains the differences between the Plesiochronous Digital Hierarchy and the Synchronous Digital Hierarchy.
TECHNICAL TUTORIAL Subject: SDH Date: October, 00 Prepared by: John Rumsey SDH Synchronous Digital Hierarchy. Introduction. The Plesiochronous Digital Hierarchy (PDH). The Synchronous Digital Hierarchy
Signal directionality Lower frequency signals are omnidirectional Higher frequency signals can be focused in a directional beam
Transmission Media Transmission medium Physical path between transmitter and receiver May be guided (wired) or unguided (wireless) Communication achieved by using em waves Characteristics and quality of
Chapter 6 Bandwidth Utilization: Multiplexing and Spreading 6.1
Chapter 6 Bandwidth Utilization: Multiplexing and Spreading 6.1 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Note Bandwidth utilization is the wise use of
Sol: Optical range from λ 1 to λ 1 +Δλ contains bandwidth
1. Use Figure 3.47 and Figure 3.50 to explain why the bandwidth of twisted-wire pairs and coaxial cable decreases with distance. Figure 3.47 figure 3.50 sol: The bandwidth is the range of frequencies where
Unit of Learning # 2 The Physical Layer. Redes de Datos Sergio Guíñez Molinos [email protected] 1-2009
Unit of Learning # 2 The Physical Layer Redes de Datos Sergio Guíñez Molinos [email protected] 1-2009 The Theoretical Basis for Data Communication Sergio Guíñez Molinos Redes de Computadores 2 The Theoretical
Public Switched Telephone System
Public Switched Telephone System Structure of the Telephone System The Local Loop: Modems, ADSL Structure of the Telephone System (a) Fully-interconnected network. (b) Centralized switch. (c) Two-level
Residential Broadband: Technologies for High-Speed Access To Homes
Residential Broadband: Technologies for High-Speed Access To Homes The Ohio State University Columbus, OH 43210-1277 1277 http://www.cse.ohio-state.edu/~jain/ 1 Overview 56 kbps Modems, ISDN ADSL, VDSL
Glossary of Telco Terms
Glossary of Telco Terms Access Generally refers to the connection between your business and the public phone network, or between your business and another dedicated location. A large portion of your business
TCOM 370 NOTES 99-6 VOICE DIGITIZATION AND VOICE/DATA INTEGRATION
TCOM 370 NOTES 99-6 VOICE DIGITIZATION AND VOICE/DATA INTEGRATION (Please read appropriate parts of Section 2.5.2 in book) 1. VOICE DIGITIZATION IN THE PSTN The frequencies contained in telephone-quality
Local Area Network By Bhupendra Ratha, Lecturer School of Library and Information Science Devi Ahilya University, Indore Email: [email protected] Local Area Network LANs connect computers and peripheral
Telecommunications systems (Part 2)
School of Business Eastern Illinois University Telecommunications systems (Part 2) Abdou Illia, Spring 2007 (Week 12, Thursday 3/29/2007) T-1 Digital Subscriber Line (DSL) Cellular Telephone System Integrated
Telecommunications and the Information Age ET108B. Cell Phone Network
Telecommunications and the Information Age ET108B Cell Phone Network The Cellular Telephone Network Cellular Telephone Features Carrying Data Across the Cellular Network Satellite Telephone Service Cellular
Introduction to Packet Voice Technologies and VoIP
Introduction to Packet Voice Technologies and VoIP Cisco Networking Academy Program Halmstad University Olga Torstensson 035-167575 [email protected] IP Telephony 1 Traditional Telephony 2 Basic
Objectives. Lecture 4. How do computers communicate? How do computers communicate? Local asynchronous communication. How do computers communicate?
Lecture 4 Continuation of transmission basics Chapter 3, pages 75-96 Dave Novak School of Business University of Vermont Objectives Line coding Modulation AM, FM, Phase Shift Multiplexing FDM, TDM, WDM
:-------------------------------------------------------Instructor---------------------
Yarmouk University Hijjawi Faculty for Engineering Technology Computer Engineering Department CPE-462 Digital Data Communications Final Exam: A Date: 20/05/09 Student Name :-------------------------------------------------------Instructor---------------------
Computer Networks. Definition of LAN. Connection of Network. Key Points of LAN. Lecture 06 Connecting Networks
Computer Networks Lecture 06 Connecting Networks Kuang-hua Chen Department of Library and Information Science National Taiwan University Local Area Networks (LAN) 5 kilometer IEEE 802.3 Ethernet IEEE 802.4
Network administrators must be aware that delay exists, and then design their network to bring end-to-end delay within acceptable limits.
Delay Need for a Delay Budget The end-to-end delay in a VoIP network is known as the delay budget. Network administrators must design a network to operate within an acceptable delay budget. This topic
ADSL or Asymmetric Digital Subscriber Line. Backbone. Bandwidth. Bit. Bits Per Second or bps
ADSL or Asymmetric Digital Subscriber Line Backbone Bandwidth Bit Commonly called DSL. Technology and equipment that allow high-speed communication across standard copper telephone wires. This can include
The Conversion Technology Experts. Media Conversion: Cost-Effectively Integrating T1 into your Fiber Network
The Conversion Technology Experts Media Conversion: Cost-Effectively Integrating T1 into your Fiber Network Media Conversion: Cost Effectively Integrating T1 into Your Fiber Network Revealing some simple
What Does Communication (or Telecommunication) Mean?
What Does Communication (or Telecommunication) Mean? The term communication (or telecommunication) means the transfer of some form of information from one place (known as the source of information) to
Narrowband and Broadband Access Technologies
Computer Networks and Internets, 5e Chapters 12 and 16 Access and Interconnection Technologies (slidesets abridged/combined) By Douglas Comer Modified from the lecture slides of Lami Kaya ([email protected])
Module 1 Communication Networks. Version 1 ECE, IIT Kharagpur
Module 1 Communication Networks Lesson 1 Communication Networks An Introduction and Overview INSTRUCTIONAL OBJECTIVES General This lesson is designed to give the reader the concept and definition of a
TACTICAL FIBER OPTIC MODEMS U.S. Army and ANSI Standards
This data sheet contains controlled technical data that has been cleared for public release by the U.S. Government under ITAR Exemption 22CFR 125.4(b)(13). TACTICAL FIBER OPTIC MODEMS U.S. Army and ANSI
10/13/2008 Vasile Dadarlat --Computer Networks 1
Lecture 4 Communications Channels Definition: the part that connects a data source to a data sink; based on the transmission media. Classification criteria: -type of the link (connection): point-to-point,
Chapter 1: roadmap. Access networks and physical media
Chapter 1: roadmap 1.1 What is the nternet? 1.2 Network edge 1.3 Network core 1.4 Network access and physical media 1.5 nternet structure and SPs 1.6 elay & loss in packet-switched networks 1.7 Protocol
Hello viewers, welcome to today s lecture on cellular telephone systems.
Data Communications Prof. A. Pal Department of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture minus 31 Cellular Telephone Systems Hello viewers, welcome to today s lecture
SIP Trunking and Voice over IP
SIP Trunking and Voice over IP Agenda What is SIP Trunking? SIP Signaling How is Voice encoded and transported? What are the Voice over IP Impairments? How is Voice Quality measured? VoIP Technology Confidential
Chapter 9A. Network Definition. The Uses of a Network. Network Basics
Chapter 9A Network Basics 1 Network Definition Set of technologies that connects computers Allows communication and collaboration between users 2 The Uses of a Network Simultaneous access to data Data
APPENDIX A GENERAL DEFINITIONS & SERVICE FUNCTIONS
APPENDIX A GENERAL DEFINITIONS & SERVICE FUNCTIONS This Appendix provides the basic definitions and service functions of local communications services under the scope of this contract. The Government requires
CHAPTER 18 THE PUBLIC TELEPHONE NETWORK # DEFINITIONS TERMS
CHAPTER 18 THE PUBLIC TELEPHONE NETWORK # DEFINITIONS TERMS 1) It uses the largest computer network in the world to interconnect millions of subscribers in such a way that the myriad of companies function
Think! Think! Data communications. Long-Distance. Modems: to analog and back. Transmission Media. The last mile is the hardest for digital information
Data communications Think! Think!?? What makes it possible to communicate from point A to point B?? Long-Distance Transmission Media If you place a call outside the local transport area, an interchange
Communication Networks. MAP-TELE 2011/12 José Ruela
Communication Networks MAP-TELE 2011/12 José Ruela Network basic mechanisms Introduction to Communications Networks Communications networks Communications networks are used to transport information (data)
Lecture 12 Transport Networks (SONET) and circuit-switched networks
CS4/MSc Computer Networking Lecture 1 Transport Networks (SONET) and circuit-switched networks Computer Networking, Copyright University of Edinburgh 005 Transport Networks and SONET/SDH In most cases
COMPUTERS ARE YOUR FUTURE CHAPTER 8 WIRED & WIRELESS COMMUNICATION
COMPUTERS ARE YOUR FUTURE CHAPTER 8 WIRED & WIRELESS COMMUNICATION Answers to End-of-Chapter Questions Matching g 1. whiteboard i 2. sending device o 3. streaming j 4. WiFi m 5. Webcam d 6. data transfer
How To Encode Data From A Signal To A Signal (Wired) To A Bitcode (Wired Or Coaxial)
Physical Layer Part 2 Data Encoding Techniques Networks: Data Encoding 1 Analog and Digital Transmissions Figure 2-23.The use of both analog and digital transmissions for a computer to computer call. Conversion
Security & Surveillance Cabling Systems
Security & Surveillance Cabling Systems Security and Surveillance Cabling Systems The video security industry is growing and ever-changing, offering a wealth of opportunity for today s security professionals.
TUTORIAL FOR CHAPTER 8
TUTORIAL FOR CHAPTER 8 PROBLEM 1) The informaiton in four analog signals is to be multiplexed and transmitted over a telephone channel that has a 400 to 3100 Hz bandpass. Each of the analog baseband signals
Chapter 1. Introduction and Historical Background of Computer Networks. 1.1 Scope of Computer Networks
Chapter 1 Introduction and Historical Background of Computer Networks 1.1 Scope of Computer Networks Perhaps the most significant change in computer science over the past twenty years has been the enormous
Chapter 8: The Telephone System
Chapter 8: The Telephone System MULTIPLE CHOICE 1. DTMF stands for: a. Digital Telephony Multiple Frequency c. Dual-Tone Multifrequency b. Dial Tone Master Frequency d. Digital Trunk Master Frequency 2.
EE4367 Telecom. Switching & Transmission. Prof. Murat Torlak
FIBER OPTIC COMMUNICATIONS Optical Fibers Fiber optics (optical fibers) are long, thin strands of very pure glass about the size of a human hair. They are arranged in bundles called optical cables and
Introduction to Ethernet
Technical Tutorial 2002 12-06 Table of Contents 1: Introduction 2: Ethernet 3: IEEE standards 4: Topology 5: CSMA/CD 6: Wireless-LAN 7: Transmission Speed 8: Limitations of Ethernet 9: Sena Products and
High Speed Ethernet. Dr. Sanjay P. Ahuja, Ph.D. Professor School of Computing, UNF
High Speed Ethernet Dr. Sanjay P. Ahuja, Ph.D. Professor School of Computing, UNF Hubs and Switches Hubs and Switches Shared Medium Hub The total capacity in the shared medium hub configuration (figure
CN1047 INTRODUCTION TO COMPUTER NETWORKING CHAPTER 1 BASIC CONCEPTS OF NETWORK
CN1047 INTRODUCTION TO COMPUTER NETWORKING CHAPTER 1 BASIC CONCEPTS OF NETWORK DEFINTION & APPLICATIONS DEFINTION: A computer network is defined as the interconnection of two or more computers. It is done
CHAPTER 8 MULTIPLEXING
CHAPTER MULTIPLEXING 3 ANSWERS TO QUESTIONS.1 Multiplexing is cost-effective because the higher the data rate, the more cost-effective the transmission facility.. Interference is avoided under frequency
11/22/2013 1. komwut@siit
11/22/2013 1 Week3-4 Point-to-Point, LAN, WAN Review 11/22/2013 2 What will you learn? Representatives for Point-to-Point Network LAN Wired Ethernet Wireless Ethernet WAN ATM (Asynchronous Transfer Mode)
Introduction to Optical Networks
Yatindra Nath Singh Assistant Professor Electrical Engineering Department Indian Institute of Technology, Kanpur Email: [email protected] http://home.iitk.ac.in/~ynsingh 1 What are optical network? Telecomm
What s a protocol? What s a protocol? A closer look at network structure: What s the Internet? What s the Internet? What s the Internet?
What s the Internet? PC server laptop cellular handheld access points wired s connected computing devices: hosts = end systems running apps communication s fiber, copper, radio transmission rate = bandwidth
Computer Networks. By Hardeep Singh
Computer Networks Contents Introduction Basic Elements of communication systemnetwork Topologies Network types Introduction A Computer network is a network of computers that are geographically distributed,
CMPT 165: The Internet, Part 3
CMPT 165: The Internet, Part 3 Tamara Smyth, [email protected] School of Computing Science, Simon Fraser University September 15, 2011 1 Basic Communication Technology Packet Switching (sharing a tranmission
ADSL part 2, Cable Internet, Cellular
ADSL part 2, Cable Internet, Cellular 20 June 2016 Lecture 12 20 June 2016 SE 428: Advanced Computer Networks 1 Topics for Today ADSL Cable Internet Cellular Radio Networks 20 June 2016 SE 428: Advanced
Imecom White Paper. T1/PRI Configuration for the Imecom DM Fax Server with Brooktrout TR1034 Digital Fax Board(s)
Imecom White Paper T1/PRI Configuration for the Imecom DM Fax Server with Brooktrout TR1034 Digital Fax Board(s) Table of Contents OVERVIEW... 2 ORDERING T1 PRI (PRIMARY RATE ISDN) SERVICE FOR BROOKTROUT
BROADBAND AND HIGH SPEED NETWORKS
BROADBAND AND HIGH SPEED NETWORKS INTRODUCTION TO MUTIPLEXING Multiplexing is the set of techniques that allows the simultaneous transmission of multiple signals across a single data link INTRODUCTION
Traditional Telephony
Traditional Telephony Basic Components of a Telephony Network This topic introduces the components of traditional telephony networks. Basic Components of a Telephony Network 3 A number of components must
Introduction To Computer Networks
Introduction To Computer Networks 1. LAN s and WAN s 2. Some network and internetwork components 3. The communication process 4. Communication media 5. Topologies 6. Communication models and Standards
White Paper: Voice Over IP Networks
FREE FREE One One Hour Hour VoIPonline VoIPonline Seminar TM Seminar TM For additional information contact: Terry Shugart - [email protected] http://www.analogic.com/cti TEL: 978-977-3000 FAX: 978-977-6813
Troubleshooting and Auto-Negotiation Features for IMC Networks Media Conversion Products
Troubleshooting and Auto-Negotiation Features for IMC Networks Media Conversion Products Table of Contents Introduction...................................................................... 1 About Link
Getting Broadband. FCC Consumer Facts. What Is Broadband?
Getting Broadband FCC Consumer Facts What Is Broadband? Broadband or high-speed Internet access allows users to access the Internet and Internetrelated services at significantly higher speeds than those
Lecture 3: Signaling and Clock Recovery. CSE 123: Computer Networks Stefan Savage
Lecture 3: Signaling and Clock Recovery CSE 123: Computer Networks Stefan Savage Last time Protocols and layering Application Presentation Session Transport Network Datalink Physical Application Transport
DigiPoints Volume 1. Student Workbook. Module 5 Growing Capacity Through Technology
Growing Capacity Through Technology Page 5. 1 DigiPoints Volume 1 Module 5 Growing Capacity Through Technology Summary This module covers the North American Digital Hierarchy (NADH), the European Digital
Fibre Channel Fiber Cabling
OVERVIEW This paper will discuss the Fibre Channel standards for fiber cables at both 1Gb and 2Gb speeds, and also some discussion of departures from standard. Items discussed will be cable types, plug
Residential Broadband: Technologies for High-Speed Access To Homes
Residential Broadband: Technologies for High-Speed Access To Homes Columbus, OH 43210 [email protected] http://www.cis.ohio-state.edu/~jain/cis788-97/ Email questions to [email protected]
CSCI 491-01 Topics: Internet Programming Fall 2008
CSCI 491-01 Topics: Internet Programming Fall 2008 Introduction Derek Leonard Hendrix College September 3, 2008 Original slides copyright 1996-2007 J.F Kurose and K.W. Ross 1 Chapter 1: Introduction Our
FURTHER READING: As a preview for further reading, the following reference has been provided from the pages of the book below:
FURTHER READING: As a preview for further reading, the following reference has been provided from the pages of the book below: Title: Signaling System #7 Second Edition Author: Travis Russell Publisher:
NXU RoIP Link to Eliminate Voice-Grade Leased Line
NXU RoIP Link to Eliminate Voice-Grade Leased Line Purpose This Application Note will describe a method at which Network Extension Units (NXUs) can be utilized on an existing digital network to eliminate
T1 Networking Made Easy
T1 Networking Made Easy 1 THE T1 CARRIER 3 WHAT DOES A T1 LOOK LIKE? 3 T1 BANDWIDTH 3 T1 PHYSICAL CHARACTERISTICS 4 T1 FRAMING 5 LINE CODE 6 T1 NETWORKING 6 TELCOS 6 PSTN ACCESS WITH A T1 8 SUMMARY OF
Chapter 11: WAN. Abdullah Konak School of Information Sciences and Technology Penn State Berks. Wide Area Networks (WAN)
Chapter 11: WAN Abdullah Konak School of Information Sciences and Technology Penn State Berks Wide Area Networks (WAN) The scope of a WAN covers large geographic areas including national and international
Chapter 3 ATM and Multimedia Traffic
In the middle of the 1980, the telecommunications world started the design of a network technology that could act as a great unifier to support all digital services, including low-speed telephony and very
FIBER OPTIC APPLICATION IN A PROFIBUS NETWORK
FIBER OPTIC APPLICATION IN A PROFIBUS NETWORK Field busses are industrial control systems using Programmable Logic lers (PLC) to control and manage field devices found in industrial environments. The communication
Course 1. General view on the fixed telephone network. Digital networks. General aspects. Definitions.
Course 1. General view on the fixed telephone network. Digital networks. General aspects. Definitions. 1. General view on the fixed telephone network Communication network dedicated to voice transmission;
Network Edge and Network Core
Computer Networks Network Edge and Network Core Based on Computer Networking, 4 th Edition by Kurose and Ross What s s the Internet: Nuts and Bolts View PC server wireless laptop cellular handheld access
www.aticourses.com Boost Your Skills with On-Site Courses Tailored to Your Needs
Boost Your Skills with On-Site Courses Tailored to Your Needs www.aticourses.com The Applied Technology Institute specializes in training programs for technical professionals. Our courses keep you current
1 Which network type is a specifically designed configuration of computers and other devices located within a confined area? A Peer-to-peer network
Review questions 1 Which network type is a specifically designed configuration of computers and other devices located within a confined area? A Peer-to-peer network B Local area network C Client/server
RTT 60.5 msec receiver window size: 32 KB
Real-World ARQ Performance: TCP Ex.: Purdue UCSD Purdue (NSL): web server UCSD: web client traceroute to planetlab3.ucsd.edu (132.239.17.226), 30 hops max, 40 byte packets 1 switch-lwsn2133-z1r11 (128.10.27.250)