This book is a complete revision of the best-selling, well-respected first edition (1578701686). The continued focus of Voice over IP Fundamentals is to bring users, implementers, and developers of this technology up to a basic level of understanding of the marketplace, history, and future of VoIP. This is accomplished through thorough updates to technical data and examination of new applications that have become popular over the past years. Areas for future growth are also explored. This new edition focuses on the many changes that have occurred in basic technology and new applications using that technology. For example, the first version of this book published when SIP was a new and unknown technology. SIP is now seen as the ideal control protocol for voice traffic and other real time media streams. Additionally, new applications combining legacy services with new services are being deployed. One example of these services is the combination of telephony services and presence applications. As there are multiple titles in the marketplace that address how to specifically implement a given technology, this book focuses primarily on the technology and applications. This second edition features brand-new chapters on billing and mediation services, voice security, IP and PSTN internetworking, and applications chapters for both enterprises and service providers.
Product Description
A systematic approach to understanding the basics of voice over IP
Understand the basics of enterprise and public telephony networking, IP networking, and how voice is transported over IP networks
Learn the various caveats of converging voice and data networks
Examine the basic VoIP signaling protocols (H.323, MGCP/H.248, SIP) and primary legacy voice signaling protocols (ISDN, C7/SS7)
Explore how VoIP can run the same applications as the existing telephony system but in a more cost-efficient and scalable manner
Delve into such VoIP topics as jitter, latency, packet loss, codecs, QoS tools, and security
Voice over IP (VoIP) has become an important factor in network communications, promising lower operational costs, greater flexibility, and a variety of enhanced applications. To help you understand VoIP networks, Voice over IP Fundamentals provides a thorough introduction to the basics of VoIP.
Voice over IP Fundamentals explains how a basic IP telephony infrastructure is built and works today, major concepts concerning voice and data networking, and transmission of voice over data networks. You'll learn how voice is signaled through legacy telephone networks, how IP signaling protocols are used to interoperate with current telephony systems, and how to ensure good voice quality using quality of service (QoS).
Even though Voice over IP Fundamentals is written for anyone seeking to understand how to use IP to transport voice, its target audience comprises both voice and data networking professionals. In the past, professionals working in voice and data networking did not have to understand each other's roles. However, in this world of time-division multiplexing (TDM) and IP convergence, it is important to understand how these technologies work together. Voice over IP Fundamentals explains all the details so that voice experts can understand data networking and data experts can understand voice networking.
The second edition of this best-selling book includes new chapters on the importance of billing and mediation in a VoIP network, security, and the common types of threats inherent when packet voice environments, public switched telephone networks (PSTN), and VoIP interoperate. It also explains enterprise and service-provider applications and services.
Backcover
A systematic approach to understanding the basics of voice over IP
Understand the basics of enterprise and public telephony networking, IP networking, and how voice is transported over IP networks
Learn the various caveats of converging voice and data networks
Examine the basic VoIP signaling protocols (H.323, MGCP/H.248, SIP) and primary legacy voice signaling protocols (ISDN, C7/SS7)
Explore how VoIP can run the same applications as the existing telephony system but in a more cost-efficient and scalable manner
Delve into such VoIP topics as jitter, latency, packet loss, codecs, QoS tools, and security
Voice over IP (VoIP) has become an important factor in network communications, promising lower operational costs, greater flexibility, and a variety of enhanced applications. To help you understand VoIP networks, Voice over IP Fundamentals provides a thorough introduction to the basics of VoIP.
Voice over IP Fundamentals explains how a basic IP telephony infrastructure is built and works today, major concepts concerning voice and data networking, and transmission of voice over data networks. You'll learn how voice is signaled through legacy telephone networks, how IP signaling protocols are used to interoperate with current telephony systems, and how to ensure good voice quality using quality of service (QoS).
Even though Voice over IP Fundamentals is written for anyone seeking to understand how to use IP to transport voice, its target audience comprises both voice and data networking professionals. In the past, professionals working in voice and data networking did not have to understand each other's roles. However, in this world of time-division multiplexing (TDM) and IP convergence, it is important to understand how these technologies work together. Voice over IP Fundamentals explains all the details so that voice experts can understand data networking and data experts can understand voice networking.
The second edition of this best-selling book includes new chapters on the importance of billing and mediation in a VoIP network, security, and the common types of threats inherent when packet voice environments, public switched telephone networks (PSTN), and VoIP interoperate. It also explains enterprise and service-provider applications and services.
Introduction
Part I PSTN
Chapter 1 Overview of the PSTN and Comparisons to Voice over IP
The Beginning of the PSTN
Understanding PSTN Basics
Analog and Digital Signaling
Digital Voice Signals
Local Loops, Trunks, and Interswitch Communication
PSTN Signaling
PSTN Services and Applications
PSTN Numbering Plans
Drivers Behind the Convergence Between Voice and Data Networking
Drawbacks to the PSTN
Packet Telephony Network Drivers
Standards-Based Packet Infrastructure Layer
Open Call-Control Layer
VoIP Call-Control Protocols
Open Service Application Layer
New PSTN Network Infrastructure Model
Summary
Chapter 2 Enterprise Telephony Today
Similarities Between PSTN and ET
Differences Between PSTN and ET
Signaling Treatment
Advanced Features
Common ET and PSTN Interworking
ET Networks Provided by PSTN
Private ET Networks
Summary
Chapter 3 Basic Telephony Signaling
Signaling Overview
Analog and Digital Signaling
Direct Current Signalin8
In-Band and Out-of-Band Signaling
Loop-Start and Ground-Start Signaling
CAS and CCS
E&M Signaling
Type I
Type II
Type III
Type IV
Type V
CAS
Bell System MF Signaling
CCITT No. 5 Signaling
R1
R2
ISDN
ISDN Service5
ISDN Access Interface6
ISDN L2 and L3 Protocols
Basic ISDN Call
QSIG
QSIG Service4
QSIG Architecture and Reference Points
QSIG Protocol Stac5
QSIG Basic Call Setup and Teardown Example
DPNSS
Summary
Chapter 4 Signaling System 7
SS7 Network Architecture
Signaling Elements
Signaling Links
SS7 Protocol Overview
Physical Layer-MTP L1
Data Layer-MTP L2
Network Layer-MTP3
SCCP
TUP
ISUP
TCAP
SS7 Examples
Basic Call Setup and Teardown Example
800 Database Query Example
List of SS7 Specifications
Summary
Chapter 5 PSTN Services
Plain Old Telephone Service
Custom Calling Features
CLASS Features
Voice Mail
Business Services
Virtual Private Voice Networks
Centrex Services
Call Center Services
Service Provider Services
Database Service
Operator Services
Summary
Part II Voice over IP Technology
Chapter 6 IP Tutorial
OSI Reference Model
The Application Layer
The Presentation Layer
The Session Layer
The Transport Layer
The Network Layer
The Data Link Layer
The Physical Layer
Internet Protocol
Data Link Layer Addresses
IP Addressing
Routing Protocols
Distance-Vector Routing
Link-State Routing
BGP
IS-IS
OSPF
IGRP
EIGRP
RIP
IP Transport Mechanisms
TCP
UDP
Summary
References
Chapter 7 VoIP: An In-Depth Analysis
Delay/Latency
Propagation Delay
Handling Delay
Queuing Delay
Jitter
Pulse Code Modulation
What Is PCM?
A Sampling Example for Satellite Networks
Voice Compression
Voice Coding Standards
Mean Opinion Score
Perceptual Speech Quality Measurement
Echo
Packet Loss
Voice Activity Detection
Digital-to-Analog Conversion
Tandem Encoding
Transport Protocols
RTP
Reliable User Data Protocol
Dial-Plan Design
End Office Switch Call-Flow Versus IP Phone Call
Summary
References
Chapter 8 Quality of Service
QoS Network Toolkit
Edge Functions
Bandwidth Limitations
cRTP
Queuing
Packet Classification
Traffic Policing
Traffic Shaping
Edge QoS Wrap-Up
Backbone Networks
High-Speed Transport
Congestion Avoidance
Backbone QoS Wrap-Up
Rules of Thumb for QoS
Cisco Labs' QoS Testing
Summary
Chapter 9 Billing and Mediation Services
Billing Basics
Authentication, Authorization, and Accounting (AAA)
RADIUS
Vendor-Specific Attributes (VSA)
Billing Formats
Case Study: Cisco SIP Proxy Server and Billing
RADIUS Server Accounting
Challenges for VoIP Networks
Mediation Services
Summary
Chapter 10 Voice Security
Security Requirements
Security Technologies
Shared-Key Approaches
Public-Key Cryptography
Protecting Voice Devices
Disabling Unused Ports/Services
HIPS
Protecting IP Network Infrastructure
Segmentation
Traffic Policing
802.1x Device Authentication
Layer 2 Tools
NIPS
&nb
A systematic approach to understanding the basics of voice over IP
Understand the basics of enterprise and public telephony networking, IP networking, and how voice is transported over IP networks
Learn the various caveats of converging voice and data networks
Examine the basic VoIP signaling protocols (H.323, MGCP/H.248, SIP) and primary legacy voice signaling protocols (ISDN, C7/SS7)
Explore how VoIP can run the same applications as the existing telephony system but in a more cost-efficient and scalable manner
Delve into such VoIP topics as jitter, latency, packet loss, codecs, QoS tools, and security
Voice over IP (VoIP) has become an important factor in network communications, promising lower operational costs, greater flexibility, and a variety of enhanced applications. To help you understand VoIP networks, Voice over IP Fundamentals provides a thorough introduction to the basics of VoIP.
Voice over IP Fundamentals explains how a basic IP telephony infrastructure is built and works today, major concepts concerning voice and data networking, and transmission of voice over data networks. You
Product Description
A systematic approach to understanding the basics of voice over IP
Understand the basics of enterprise and public telephony networking, IP networking, and how voice is transported over IP networks
Learn the various caveats of converging voice and data networks
Examine the basic VoIP signaling protocols (H.323, MGCP/H.248, SIP) and primary legacy voice signaling protocols (ISDN, C7/SS7)
Explore how VoIP can run the same applications as the existing telephony system but in a more cost-efficient and scalable manner
Delve into such VoIP topics as jitter, latency, packet loss, codecs, QoS tools, and security
Voice over IP (VoIP) has become an important factor in network communications, promising lower operational costs, greater flexibility, and a variety of enhanced applications. To help you understand VoIP networks, Voice over IP Fundamentals provides a thorough introduction to the basics of VoIP.
Voice over IP Fundamentals explains how a basic IP telephony infrastructure is built and works today, major concepts concerning voice and data networking, and transmission of voice over data networks. You'll learn how voice is signaled through legacy telephone networks, how IP signaling protocols are used to interoperate with current telephony systems, and how to ensure good voice quality using quality of service (QoS).
Even though Voice over IP Fundamentals is written for anyone seeking to understand how to use IP to transport voice, its target audience comprises both voice and data networking professionals. In the past, professionals working in voice and data networking did not have to understand each other's roles. However, in this world of time-division multiplexing (TDM) and IP convergence, it is important to understand how these technologies work together. Voice over IP Fundamentals explains all the details so that voice experts can understand data networking and data experts can understand voice networking.
The second edition of this best-selling book includes new chapters on the importance of billing and mediation in a VoIP network, security, and the common types of threats inherent when packet voice environments, public switched telephone networks (PSTN), and VoIP interoperate. It also explains enterprise and service-provider applications and services.
Backcover
A systematic approach to understanding the basics of voice over IP
Understand the basics of enterprise and public telephony networking, IP networking, and how voice is transported over IP networks
Learn the various caveats of converging voice and data networks
Examine the basic VoIP signaling protocols (H.323, MGCP/H.248, SIP) and primary legacy voice signaling protocols (ISDN, C7/SS7)
Explore how VoIP can run the same applications as the existing telephony system but in a more cost-efficient and scalable manner
Delve into such VoIP topics as jitter, latency, packet loss, codecs, QoS tools, and security
Voice over IP (VoIP) has become an important factor in network communications, promising lower operational costs, greater flexibility, and a variety of enhanced applications. To help you understand VoIP networks, Voice over IP Fundamentals provides a thorough introduction to the basics of VoIP.
Voice over IP Fundamentals explains how a basic IP telephony infrastructure is built and works today, major concepts concerning voice and data networking, and transmission of voice over data networks. You'll learn how voice is signaled through legacy telephone networks, how IP signaling protocols are used to interoperate with current telephony systems, and how to ensure good voice quality using quality of service (QoS).
Even though Voice over IP Fundamentals is written for anyone seeking to understand how to use IP to transport voice, its target audience comprises both voice and data networking professionals. In the past, professionals working in voice and data networking did not have to understand each other's roles. However, in this world of time-division multiplexing (TDM) and IP convergence, it is important to understand how these technologies work together. Voice over IP Fundamentals explains all the details so that voice experts can understand data networking and data experts can understand voice networking.
The second edition of this best-selling book includes new chapters on the importance of billing and mediation in a VoIP network, security, and the common types of threats inherent when packet voice environments, public switched telephone networks (PSTN), and VoIP interoperate. It also explains enterprise and service-provider applications and services.
Introduction
Part I PSTN
Chapter 1 Overview of the PSTN and Comparisons to Voice over IP
The Beginning of the PSTN
Understanding PSTN Basics
Analog and Digital Signaling
Digital Voice Signals
Local Loops, Trunks, and Interswitch Communication
PSTN Signaling
PSTN Services and Applications
PSTN Numbering Plans
Drivers Behind the Convergence Between Voice and Data Networking
Drawbacks to the PSTN
Packet Telephony Network Drivers
Standards-Based Packet Infrastructure Layer
Open Call-Control Layer
VoIP Call-Control Protocols
Open Service Application Layer
New PSTN Network Infrastructure Model
Summary
Chapter 2 Enterprise Telephony Today
Similarities Between PSTN and ET
Differences Between PSTN and ET
Signaling Treatment
Advanced Features
Common ET and PSTN Interworking
ET Networks Provided by PSTN
Private ET Networks
Summary
Chapter 3 Basic Telephony Signaling
Signaling Overview
Analog and Digital Signaling
Direct Current Signalin8
In-Band and Out-of-Band Signaling
Loop-Start and Ground-Start Signaling
CAS and CCS
E&M Signaling
Type I
Type II
Type III
Type IV
Type V
CAS
Bell System MF Signaling
CCITT No. 5 Signaling
R1
R2
ISDN
ISDN Service5
ISDN Access Interface6
ISDN L2 and L3 Protocols
Basic ISDN Call
QSIG
QSIG Service4
QSIG Architecture and Reference Points
QSIG Protocol Stac5
QSIG Basic Call Setup and Teardown Example
DPNSS
Summary
Chapter 4 Signaling System 7
SS7 Network Architecture
Signaling Elements
Signaling Links
SS7 Protocol Overview
Physical Layer-MTP L1
Data Layer-MTP L2
Network Layer-MTP3
SCCP
TUP
ISUP
TCAP
SS7 Examples
Basic Call Setup and Teardown Example
800 Database Query Example
List of SS7 Specifications
Summary
Chapter 5 PSTN Services
Plain Old Telephone Service
Custom Calling Features
CLASS Features
Voice Mail
Business Services
Virtual Private Voice Networks
Centrex Services
Call Center Services
Service Provider Services
Database Service
Operator Services
Summary
Part II Voice over IP Technology
Chapter 6 IP Tutorial
OSI Reference Model
The Application Layer
The Presentation Layer
The Session Layer
The Transport Layer
The Network Layer
The Data Link Layer
The Physical Layer
Internet Protocol
Data Link Layer Addresses
IP Addressing
Routing Protocols
Distance-Vector Routing
Link-State Routing
BGP
IS-IS
OSPF
IGRP
EIGRP
RIP
IP Transport Mechanisms
TCP
UDP
Summary
References
Chapter 7 VoIP: An In-Depth Analysis
Delay/Latency
Propagation Delay
Handling Delay
Queuing Delay
Jitter
Pulse Code Modulation
What Is PCM?
A Sampling Example for Satellite Networks
Voice Compression
Voice Coding Standards
Mean Opinion Score
Perceptual Speech Quality Measurement
Echo
Packet Loss
Voice Activity Detection
Digital-to-Analog Conversion
Tandem Encoding
Transport Protocols
RTP
Reliable User Data Protocol
Dial-Plan Design
End Office Switch Call-Flow Versus IP Phone Call
Summary
References
Chapter 8 Quality of Service
QoS Network Toolkit
Edge Functions
Bandwidth Limitations
cRTP
Queuing
Packet Classification
Traffic Policing
Traffic Shaping
Edge QoS Wrap-Up
Backbone Networks
High-Speed Transport
Congestion Avoidance
Backbone QoS Wrap-Up
Rules of Thumb for QoS
Cisco Labs' QoS Testing
Summary
Chapter 9 Billing and Mediation Services
Billing Basics
Authentication, Authorization, and Accounting (AAA)
RADIUS
Vendor-Specific Attributes (VSA)
Billing Formats
Case Study: Cisco SIP Proxy Server and Billing
RADIUS Server Accounting
Challenges for VoIP Networks
Mediation Services
Summary
Chapter 10 Voice Security
Security Requirements
Security Technologies
Shared-Key Approaches
Public-Key Cryptography
Protecting Voice Devices
Disabling Unused Ports/Services
HIPS
Protecting IP Network Infrastructure
Segmentation
Traffic Policing
802.1x Device Authentication
Layer 2 Tools
NIPS
&nb
A systematic approach to understanding the basics of voice over IP
Understand the basics of enterprise and public telephony networking, IP networking, and how voice is transported over IP networks
Learn the various caveats of converging voice and data networks
Examine the basic VoIP signaling protocols (H.323, MGCP/H.248, SIP) and primary legacy voice signaling protocols (ISDN, C7/SS7)
Explore how VoIP can run the same applications as the existing telephony system but in a more cost-efficient and scalable manner
Delve into such VoIP topics as jitter, latency, packet loss, codecs, QoS tools, and security
Voice over IP (VoIP) has become an important factor in network communications, promising lower operational costs, greater flexibility, and a variety of enhanced applications. To help you understand VoIP networks, Voice over IP Fundamentals provides a thorough introduction to the basics of VoIP.
Voice over IP Fundamentals explains how a basic IP telephony infrastructure is built and works today, major concepts concerning voice and data networking, and transmission of voice over data networks. You