Cover image for Voice over IP fundamentals
Title:
Voice over IP fundamentals
Author:
Davidson, Jonathan.
Personal Author:
Publication Information:
Indianapolis, Ind. : Cisco Press, [2000]

©2000
Physical Description:
xx, 373 pages, : illustrations ; 24 cm
General Note:
Includes index.
Language:
English
ISBN:
9781578701681
Format :
Book

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Summary

Summary

A systematic approach to understanding the basics of Voice over IP Understand the basics of PSTN services and IP signaling protocols, including SS7 Learn 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, quality of service tools, and mean opinion scores Learn about the functional components involved in using Cisco gateways to deploy VoIP networks Voice over IP (VoIP), which integrates voice and data transmission, is quickly becoming an important factor in network communications. It promises lower operational costs, greater flexibility, and a variety of enhanced applications.Voice over IP Fundamentalsprovides a thorough introduction to this new technology to help experts in both the data and telephone industries plan for the new networks. You will learn how the telephony infrastructure was built and how it works today, the major concepts concerning voice and data networking, transmission of voice over data, and IP signaling protocols used to interwork with current telephony systems. The authors cover various benefits and applications of VoIP and how to ensure good voice quality in your network. This book is part of the Networking Technology Series from Cisco Press, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.


Author Notes

Jonathan Davidson , CCIE No. 2560, is the manager of service provider technical marketing for packet voice at Cisco Systems. He focuses on working with service provider and enterprise customers to develop solutions that are deployable in the new infrastructure of data and voice convergence.

James Peters has 15 years experience in architecting, designing, and implementing networks for service providers and telephone companies. He is currently the manager of engineering at Cisco Systems, responsible for end-to-end design of voice and data network solutions. Formerly, James designed many packet networks at Bell Canada.


Table of Contents

I Pstn
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
Telecommunications Deregulation
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
2 Enterprise Telephony Today
Similarities between PSTN and ET
Differences between PSTN and ET
Signaling Treatment
Advanced Features
Common ET Designs
ET Networks Provided by PSTN
Private ET Networks
3 Basic Telephony Signaling
Signaling Overview
Analog and Digital Signaling
Direct Current Signaling
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
ISDN Access Interfaces
ISDN L2 and L3 Protocols
Basic ISDN Call
QSIG
QSIG Services
QSIG Architecture and Reference Points
QSIG Protocol Stack
QSIG Basic Call Setup and Teardown Example
DPNSS
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
5 PSTN Services
Plain Old Telephone Service
Custom Calling Features
CLASS Features
Voice Mail
Integrated Services Digital Network
Business Services
Virtual Private Voice Networks
Centrex Services
Call Center Services
Service Provider Services
Database Services
Operator Services
II Voice Over Ip Technology
6 Voice over IP Benefits and Applications
Key Benefits of VoIP
Packet Telephony Call Centers
Service Provider Calling-Card Case Study
Value-Added Services
ICW
V2L
Enterprise Case Study: Acme Corporation
Acmes Current Voice and Data Network
Acmes Convergence Plan and Goals
Integration of Voice and Data Networks
7 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
References
8 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
References
9 Quality of Service
QoS Network Toolkit
Edge Functions
Band 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
III Ip Signaling Protocols
10 H.323 H.323 Elements
Terminal
Gateway
Gatekeeper
The MCU and Elements
H.323 Proxy Server
H.323 Protocol Suite
RAS Signaling
Call Control Signaling (H.225)
Media Control and Transport (H.245 and RTP/RTCP)
H.323 Call-Flows
11 Session Initiation Protocol
SIP Overview
User Agents
Network Servers
Addressing
Locating a Server
SIP Transactions
Locating a User
SIP Messages
Message Headers
Message Requests
Message Responses
Basic Operation of SIP
Proxy Server Example
Redirect Server Example
12 Gateway Control Protocols
Simple Gateway Control Protocol
Relation to Other Standards
Session Description Protocol
Transmission over UDP
SGCP Concepts
Control Functions
Call-Flows
Media Gateway Control Protocol
Event Packages
Control Functions
Notifications
13 Virtual Switch Controller
Overview of the Virtual Switch
Open Packet Telephony
Packet Voice Network Overview
Network Elements
Network Interfaces
VSC Architecture and Operations
VSC-Supported Protocols
Execution Environment
North American Numbering Plan
VSC Implementation
Application Check-Pointing
Virtual Switch Manager
Accounting
IV Voice Over Ip Applied
14 Voice over IP Configuration Issues
Dial-Plan Considerations
Dial-Plan Problems
Feature Transparency
PSTN Feature Transparency
Ciscos Dial-Plan Implementation
15 Voice over IP Applications and Services
Enterprise Applications and Benefits
Enterprise VoIP Case Study: B.A.N.C
Financing International
The Background and Setup of B.A.N.C
B.A.N.C.s Plan of Expansion
Consolidating the Networks
Chicago Router Overview
London Router Overview
Tokyo Router Overview
Denver Router Overview
CCM Overview
Service Provider Case Study: Prepaid Calling Card
BOWIE.net Multiservice Networks
AS5300-A Router Overview
Appendix A ISUP Messages/Types Formats
Index