Part 1 Fundamentals of Telephony
1.03 The Public Switched Telephone Network (PSTN)
1.05 Analog Circuits
1.07 What is Sound?
1.09 The Voiceband
1.11 Plain Ordinary Telephone Service (POTS)
1.13 DTMF Address Signaling
1.15 Signaling System 7 (SS7)
Part 2 Telecom Equipment
2.03 Telephone Switches
2.05 PBX vs. Centrex
2.07 Voice VPNs
2.09 Call Centers
Part 3 The Telecommunications Industry
3.03 US Domestic Telcos
3.05 AT&T and Verizon
3.07 Canadian Telephone Companies
3.09 PSTN Switching Centers Before Competition
3.11 Accessing The Interexchange Carriers
3.13 Competitive Local Exchange Carriers (CLECs)
Part 1 Digital Communications
1.03 Why Digital?
1.05 Analog and Digital: What Do We Really Mean?
1.07 Continuous Signals, Discrete Signals
1.09 Voice Digitization (Analog ? Digital Conversion)
1.11 Voice Reconstruction (Digital ? Analog Conversion)
1.13 Voice Digitization Summary
1.15 The Digital Hierarchy: Industry Standard Line Speeds
1.17 Popular Technologies: Digital Carrier Systems
1.19 ISDN BRI and PRI
1.21 Digital Circuit Voice Applications
1.23 Digital Circuit Data Applications
1.25 Digital Video
1.27 Integration: Voice, Video, Data
Part 2 Transmission Systems
2.03 Time Division Multiplexing
2.05 T1 Carrier System
2.07 T1 Basics: Multiplexers
2.09 Framing and Channels
2.11 Pulses and Repeaters
2.13 How T1 is Provided
2.15 Fibers and Cables
2.17 SONET and DWDM: Core Networks
2.19 International Digital Hierarchies
We'll complete this course with an understanding of the “Network Cloud”, why people use clouds to draw networks, and what is really going on inside that cloud.
Part 1 Introduction to Data Communications and Networking
1.03 Data Circuit Model
1.05 Data Terminal Equipment (DTE)
1.07 Analog and Digital Data Circuits
1.09 Data Circuit Terminating Equipment (DCE)
1.11 Configuration Example: Point-to-Point
1.13 Multidrop Circuits
1.15 LANs
1.17 Wide Area Networks
Part 2 How Data is Formatted for Transmission
2.03 Data Communications Basics: Bits and Bytes
2.05 ASCII Code Set
2.07 “Asynchronous”
2.09 Frames
2.11 Details for Reference: Cyclic Redundancy Check
2.13 Packets
2.15 Packets vs. Frames
2.17 IP Packets
Part 3 The Network “Cloud”: How Data Circuits are Actually Provisioned
3.03 Anatomy of a Digital Circuit
3.05 Common Carriers’ Transmission Networks
3.07 Network Equipment: How and Where Each is Used
This course builds on the basic packet, frame and IP networking
concepts of Course V3, Fundamentals of Datacom and Networking,
to put in place a solid understanding of protocol stacks,
the OSI model and layers and IP addressing including address classes,
static vs. dynamic public vs. private and network address translation.
In Part 3, we move to the next higher level of knowledge,
understanding packet networks and bandwidth on demand services
from telecommunication service providers. After understanding the
core concepts, including virtual circuits, we use the grand-daddy
of packet services, X.25 to explain jargon: connection-oriented vs.
connectionless and reliable vs. unreliable packet networks.
Then we progress through technologies: Frame Relay, ATM and finish with MPLS. We'll trace the flow of TCP and IP packets from server to client across Frame Relay, then see how the same TCP/IP works over MPLS.
Part 1 Protocol Stacks and the OSI 7-Layer Reference Model
1.03 Protocols and Standards
1.05 ISO OSI Reference Model
1.07 OSI 7-Layer Model
1.09 Protocol Stacks
1.11 Protocol Stack in Operation
Part 2 IP
2.03 IP Address Classes
2.05 Dynamic IP Addresses
2.07 IP Addresses for Private Networks
2.09 Network Address Translation
Part 3 WANs – Bandwidth On Demand: Packet Network Services
3.03 Statistical TDM
3.05 Bandwidth On Demand Service Concepts
3.07 Virtual Circuit Technologies
3.09 X.25 and Jargon
3.11 Frame Relay
3.13 TCP/IP over Frame Relay
3.15 Frame Relay Performance: CIR and BIR
3.17 ATM: Capacity Management
3.19 MPLS
3.21 TCP/IP Over MPLS
In this course, we cover the Internet and IP Security.
We'll start at the beginning of the story, understanding where
the Internet came from and its fundamental principles of operation.
Then we'll look at some details and improvements such as the Domain
Name System, MIME, HTML and HTTP... which form “the Web”. We'll
review how you can connect to the Web from a residence and from
an enterprise or organization.
In the second part, we'll make a reasonably comprehensive overview
of security in the IP world. We'll begin with a discussion of risk areas, vulnerabilities and measures. Then we'll examine several areas:
computer security and malicious software like viruses and Trojan Horses and the measures to protect against these risks; network
security and firewalls, public key and private key encryption, authentication, IPsec and VPNs.
Part 1 Understanding The Internet
1.03 Internet History
1.05 Internet Basics
1.07 TCP and UDP
1.09 Internet Service Provides
1.11 Commonly Used Internet Protocols
1.13 Domain Name System
1.15 MIME and Base-64 Encoding
1.17 World Wide Web
1.19 HTML, HTTP and HTTPS
1.21 Accessing the Internet: Home Connections
1.23 Accessing the Internet: Organization Connections
Part 2 IP Security
2.03 Risk, Measures and Policy
2.05 Viruses
2.07 Trojan Horses, Denial of Service Attacks, Spyware and Exploits
2.09 Network Segmentation and Perimeters
2.11 Packet Filtering
2.13 Firewall Proxies
2.15 Stateful Packet Inspection
2.17 Encryption
2.19 Authentication
2.21 IPsec
2.23 Customer-Premise-Based VPN
2.25 Carrier VPNs
Understanding Wireless 1 begins with basic radio concepts,
understanding "analog radio" and "digital radio", then covers
fundamentals of mobile communication networks: base stations,
cells, handoffs and mobility.
With this in place, we go through the first and second
generation technologies: AMPS, TDMA, GSM and CDMA, and
understand how each works, their strengths and weaknesses
and how they relate to each other.
In Part 3, we concentrate on data over cellular and 3G, and cover the differences between GPRS, Wideband CDMA or UMTS, cdma2000, 1X, 3X and 1XEV-DO. We review expected throughput in bits/second and which carriers are supporting which technologies. We conclude with applications such as i-mode, SMS, wireless email, web surfing, WAP and XML.
Part 1 General Principles
1.03 Wireless
1.05 Analog Radio
1.07 Digital Radio: Keying
1.09 Limitations and Impairments
Part 2 Cellular
2.03 Mobile Communications
2.05 Cellular Standards
2.07 2G, 2.5G, 3G Migration
2.09 Cellular Principles
2.11 1G: Analog
2.13 2G: Digital
2.15 Digital Cellular: Voice
2.17 2G: TDMA (IS-136)
2.19 2G: GSM
2.21 GSM System Architecture
2.23 2G: CDMA (IS-95, cdmaOne)
2.25 CDMA: Coding
2.27 CDMA: Spread Spectrum
2.29 CDMA Particularities
2.31 CDMA System Architecture
Part 3 3G and Data over Cellular
3.03 Modems over 1G
3.05 CDPD: Packets over 1G
3.07 Data over 2G Cellular
3.09 Data over TDMA/GSM
3.11 GPRS: 2.5G
3.13 Data over CDMA
3.15 3G
3.17 IMT-MC: cdma2000
3.19 1X, 3X and 1xEV-DO
3.21 IMT-DS: Wideband CDMA
3.23 Throughput Comparisons
3.25 Service Providers
Part 4 Applications and Delivery
4.03 SMS and i-mode
4.05 Wireless E-mail
4.07 Device Evolution
4.09 Delivering Web Content
4.11 WAP
4.13 XML
Understanding VoIP is a series of high-quality video courses designed for those needing to get up to speed on and understand Voice over IP technologies, buzzwords, jargon and mainstream solutions, and importantly, the ideas and fundamental concepts underlying VoIP, independent of any particular vendor's viewpoint… knowledge you can't get reading trade magazines or talking to salespeople.
Featuring detailed graphics, bullets, extensive text notes and
our engaging and often humorous instructor Eric Coll, M.Eng., P.Eng.,
these training courses will give you the solid foundation you need
to intelligently discuss, compare, evaluate and understand VoIP
technologies, products and implementations.
We get started understanding VoIP with the Big Picture. Covering everything from talking through your computer over the Internet, to VoIP Carriers, PBX replacement and VoIP over WANs, we'll introduce all of the different ideas, concepts, hardware and software involved with VoIP.
We'll discuss regulatory issues, positioning of different carrier services, issues to plan for, and provide you with valuable strategic insights that will be of immediate benefit in planning for and managing any aspect of Voice over IP.
Chapter 1 VoIP Systems, Components, Standards, Jargon and Buzzwords
1.03 The Big Picture
1.05 Terminals
1.07 Voice in IP Packets
1.09 Soft Switches / SIP Servers / Call Managers
1.11 Media Servers
1.13 Gateways
1.15 LANs and WANs
1.17 Key VoIP Standards
1.19 Where All of This is Headed: Broadband IP Dial Tone
Chapter 2 VoIP Architectures and Implementation Choices
2.03 Computer-Computer VoIP over the Internet
2.05 Skype and IM
2.07 Computer to Phone e.g. SkypeOut (DS0 Interconnect to LEC)
2.09 Phone to Phone over the Internet e.g. Vonage
2.11 Managed IP Telephone Service (MIPT)
2.13 IXCs and IP-based Backbones
2.15 VoIP for Businesses and Organizations
2.17 VoIP-Enabled PBX and Migration Options
2.19 PBX Replacement
2.21 Hosted PBXs
2.23 IP Centrex
2.25 Asterisk and Open-Source IP-PBX Software
2.27 SO/HO IP Phone Features and Uses
In this course, we cover packetized voice and voice quality.
The first part explains the process of voice packetization and codecs, issues like jitter and packet loss that can affect the quality of the reconstructed speech, and the role of RTP and jitter buffers and finish with a review of "best practices" for achieving voice quality.
The second part explains network QoS: MPLS and Diff-Serv. We'll explain MPLS and show how it is used to implement prioritization for Service Level Agreements. We'll also cover 802.1P and queuing methods.
Part 1 Voice Packetization, Codecs and Voice Quality
1.03 Voice Packetization
1.05 Measuring Voice Quality
1.07 Factors Affecting Voice Quality
1.09 Codecs: Voice Coding and Compression
1.11 Delay
1.13 Jitter
1.15 RTP
1.17 Protocol Stack: RTP, UDP, IP, MAC
1.19 Packet Loss
1.21 Tips for Maximizing Voice Quality
Part 2 QoS: Quality of Service in the IP World
2.03 Virtual Circuit Technologies
2.05 MPLS
2.07 Differentiated Services (Diff-Serv)
2.09 Meters, Markers, Shapers and Droppers
2.11 Interworking Diff-Serv and MPLS
2.13 802.1P
2.15 Implementing QoS: Queuing Techniques
In this course, we'll cover SIP and how connections are made.
You'll understand the SIP trapezoid, how it works, demystify
jargon like proxy server and location server, understand how
SIP fits in with softswitches and call managers, and trace
the establishment of an IP phone call step by step.
In the second part, we'll cover connecting to carriers using traditional DS0 PBX trunks and PRIs, how Megaco fits in to the story, plus IP interconnect, co-existence with legacy systems, integrated messaging and more.
Part 1 SIP and Call Flow in the IP World
1.03 What SIP Is and What It Can Do
1.05 Relationship to Other Protocols
1.07 SIP URIs: “Telephone Numbers”
1.09 Register: Update Your Location
1.11 INVITE: “Dialing”
1.13 Location Service: Finding the Far End
1.15 The SIP Trapezoid
1.17 SIP Message Example
1.19 How SIP Relates to Softswitches and Call Managers
1.21 SDP: Session Description Protocol
1.23 SIP Glossary
Part 2 Carrier Interconnect
2.03 Internet - PSTN Interconnect via DS0 (Vonage / SkypeOut)
2.05 Internet - PSTN Interconnect via IP
2.07 Session Border Controllers
2.09 Carrier - Business Interconnect Using DS0 and SIP
2.11 Interconnect using MEGACO
2.13 Carrier - Business Interconnect Using IP and SIP
2.15 Co-Existence with a Legacy PBX
2.17 Integrating Integrated Messaging
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