Packet Guide to Voice over IP. A system administrator's guide to VoIP technologies - Helion

ebook

Autor: Bruce Hartpence
ISBN: 978-14-493-3963-0
stron: 242, Format: ebook
Data wydania: 2013-02-26
Księgarnia: Helion

Cena książki: 59,42 zł (poprzednio: 69,09 zł)
Oszczędzasz: 14% (-9,67 zł)

Osoby, które kupiły tę książkę, wybierały także »

Tagi: Protokoły

Go under the hood of an operating Voice over IP network, and build your knowledge of the protocols and architectures used by this Internet telephony technology. With this concise guide, you’ll learn about services involved in VoIP and get a first-hand view of network data packets from the time the phones boot through calls and subsequent connection teardown.

With packet captures available on the companion website, this book is ideal whether you’re an instructor, student, or professional looking to boost your skill set. Each chapter includes a set of review questions, as well as practical, hands-on lab exercises.

Learn the requirements for deploying packetized voice and video
Understand traditional telephony concepts, including local loop, tip and ring, and T carriers
Explore the Session Initiation Protocol (SIP), VoIP’s primary signaling protocol
Learn the operations and fields for VoIP’s standardized RTP and RTCP transport protocols
Delve into voice and video codecs for converting analog data to digital format for transmission
Get familiar with Communications Systems H.323, SIP’s widely used predecessor
Examine the Skinny Client Control Protocol used in Cisco VoIP phones in networks around the world

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Spis treści

Packet Guide to Voice over IP. A system administrator's guide to VoIP technologies eBook -- spis treści

Packet Guide to Voice over IP
Preface
- Audience
- Contents of This Book
- Conventions Used in This Book
- Using Code Examples
- Safari Books Online
- How to Contact Us
- Acknowledgments
- Dedication
1. Introduction to Voice over the Internet Protocol
- What Is VoIP?
- Real-time Versus Nonreal-time Data
- Why Change to VoIP?
  - The Business Case
- VoIP and FCC Regulation
  - 911
  - A Note on Power
- General VoIP Topologies
- Power over Ethernet
  - PoE Basic Operation
- VoIP Protocols
  - Signaling Protocols
    - Session Initiation Protocol
    - H.323
    - Skinny Client Control Protocol
  - Transport Protocol
- VoIP Basic Operation
  - Performance
- Unified Communications
- Summary
- Standards and Reading
- Review Questions
- Review Question Answers
- Lab Activities
  - Activity 1Review of the Standards
  - Activity 2Download Wireshark and the Capture Files for This Chapter
  - Activity 3Examine VoIP Offerings in Your Area
  - Activity 4Take a Look at the FCC Website
  - Activity 5Latency, Packet Loss, and Jitter
2. Traditional Telephony
- Introduction
- Overview
- Organizations
- Connecting to the Traditional World
- Telecommunication Companies
- Telephone Wiring
  - Data Cabling, EIA568 A and B
  - POTS and the Local Loop
  - T-1
    - T-1 signaling
    - T-1 physical layer and wiring
- Integrated Services Digital Network
- Basic Telephone-Call Operation
- Summary
- Standards and Reading
- Review Questions
- Review Question Answers
- Lab Activities
  - Activity 1Review Your Local Telephone Connections
  - Activity 2Experiment with the Desktop Telephone or VoIP Phone
  - Activity 3Wiring to the PBX or Central Office
  - Activity 4ITU-T Recommendations
3. Session Initiation Protocol
- Introduction
- Protocol Description
  - Components
  - Addressing
- Basic Operation
- SIP Messages and Message Structure
  - Requests
  - Responses
  - Header Fields
- Basic Operation Continued
  - Session Description Protocol (SDP)
- Trunks
- Security
- Summary
- Standards and Reading
- Review Questions
- Review Question Answers
- Lab Activities
  - Activity 1Build the Topology Shown
  - Activity 2Packet Capture
  - Activity 3Packet Capture Analysis
  - Activity 4Phone-Call Analysis
  - Activity 5SDP
4. The Real-Time Transport Protocol and the Real-Time Control Protocol
- Protocol Description
- Profiles
- Basic Operation
  - Protocol Structure
    - Header first octet
    - Header second octet
    - Packet fields beyond the first two octets
    - RTP extension header
- RTP Control Protocol
  - Detailed Operation
- Security
  - Vectors
  - SRTP Operation
- Summary
- Standards and Reading
- Review Questions
- Review Answers
- Lab Activities
  - Activity 1Topology Build
  - Activity 2Analysis of the RTP Stream
  - Activity 3The Codec
  - Activity 4Analysis of the RTCP Stream
5. Codecs
- Audio Frequencies
- Voice Signals
- Audio Coders and Decoders
  - Sampling
  - Quantizing
  - ITU-T G Series Specifications
  - Codec Selection and Performance
    - So, what values can we expect?
- Transcoding
- Packet Loss and Packet Loss Concealment (PLC)
- What Codec Are You Using?
- Video Signals
  - Sending a Series of Pictures
  - Video Encoding
- Standards Groups for Video
  - Profiles
  - ITU-T Video Recommendations
  - ISO/IEC Video Standards
- Summary
- Standards and Reading
- Review Questions
- Review Question Answers
- Lab Activities
  - Activity 1Colors
  - Activity 2File Sizes
  - Activity 3Audio Quality
  - Activity 4Video Quality
6. H.323 ITU-T Recommendation for Packet-Based Multimedia Communications Systems
- Recommendation Description
- Subprotocols
- Basic Operation and Message Structure
- H.225 Messaging
  - Q.931 Fields
  - H.225 Message Format
  - H.225 RAS
    - H.225 RAS fields
  - H.225 Standard Messages
  - H.225 Modes
    - FastStart
  - Other H.225 Messages
- H.245
- Voice Data
- Termination
- Summary
- Standards and Reading
- Review Questions
- Review Question Answers
- Lab Activities
  - Activity 1Build the Topology Shown
  - Activity 2Capture Setup
  - Activity 3Packet Capture Analysis
  - Activity 4Phone-Call Analysis
  - Activity 5H.245
7. Skinny Client Control Protocol
- Protocol Description
  - Structure
  - Basic Header Format
- Topology Construction
- Operational Stages
  - Startup
  - Registration
  - Picking up the HandsetGoing Off-Hook
  - Dialing a Number
  - At the Receiver
  - Back at the Source Phone
  - Voice Data
  - Teardown of the Call
- Performance Measuring
- Off-Site Calling
- Summary
- Reading
- Review Questions
- Review Answers
- Lab Activities
  - Activity 1Basic Topology Build
  - Activity 2Going Off-Hook
  - Activity 3Show and Debug
  - Activity 4Call-Flow Diagram
  - Activity 5Multiple Call Managers
About the Author
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