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Configuring Cisco Voice Over IP 2E - 2nd Edition - ISBN: 9781931836647, 9780080476742

Configuring Cisco Voice Over IP 2E

2nd Edition

Author: Syngress
eBook ISBN: 9780080476742
Imprint: Syngress
Published Date: 13th September 2002
Page Count: 656
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Configuring Cisco Voice Over IP, Second Edition provides network administrators with a thorough understanding of Cisco's current voice solutions. This book is organized around the configuration of all of Cisco's core VoIP products, including Cisco CallManager software, Cisco 7910 series of phones, and server-based IP PBXs. In addition, AVVID coverage has been added.

Key Features

An update to a bestselling title in a growth market. Continued competitive pressure on ISPs to deliver VoIP will create strong demand information on topic

Voice Over IP is expected to make great inroads in 2002. Voice-over-IP got its start at the time of the first edition of the book; it is now real and more companies are adopting it since IT managers have become less skeptical of IP telephony's reliability and more aware of the potential cost savings and application benefits of a converged network. Voip wares now promise easier quality-of-service (QoS) deployment, and a multitude of new IP phones and conferencing stations for corporations. Cisco and IBM recently announced a package deal that could help businesses quickly roll out IP voice in a small or midsize office. Since getting into the IP telephony market two years ago, Cisco has seen quick success in selling its voice-over-IP products into its vast installed base of IP LAN equipment customers. The firm was the top vendor of IP phones in the first quarter of this year and second in IP PBX system shipments (behind 3Com), according to Cahners In-Stat.

Table of Contents



Chapter 1 Introduction to Voice Over IP and Business Justifications


Introduction to Voice Over IP

General Overview of Voice Technologies

Common VoIP Implementation Services

Toll Bypass

Cisco IP Telephony

Corporate Multimedia

The Emerging Carrier and Intercarrier VoIP

Basic Toll-Bypass Designs

Tie-Line Replacement

The Merging of Voice and Data Networks

Using Frame Relay for Toll Bypass

Using Asynchronous Transfer Mode for Toll Bypass

Using Point-to-Point Leased Lines for Toll Bypass

Return on Investment

Advanced Features and Integration Possibilities

Replacing the Traditional PBX

TAPI Integration

Web Click-to-Talk

Transfer, Forward, and Conference Capabilities

Call Detail Recording and Data Mining



Solutions Fast Track

Frequently Asked Questions

Chapter 2 Traditional Voice Telephony Principles


Analog Systems

Basic Telephone System Operation

Analog Network Components

Voice Encoding: Standards and Techniques


Analog Signaling

Analog Signal Composition

E&M Signaling

Loop and Ground Start

Dial-Pulse Signaling

Dual-Tone Multifrequency

Digital Transmission

Time-Division Multiplexing

Integrated Services Digital Network Signaling

Call Control Signaling

Channel Associated Signaling

Common Channel Signaling

Signaling System 7

Signaling Points

Signaling Links

SS7 Protocol Stack

Analog-to-Digital Conversion



Solutions Fast Track

Frequently Asked Questions

Chapter 3 VoIP Signaling and Voice Transport Protocols


An Overview of IP Networks

IP Addressing Overview

VoIP Signaling, Addressing, and Routing

Signaling Between Routers and PBXs

VoIP Signaling

Introducing H.323

H.323 Components

H.323 Terminals (Endpoints)

H.323 Gateways

H.323 Gatekeepers

Multipoint Control Units

The H.323 Protocol Stack




Registration, Administration, and Status

Real-Time Transport Protocol


H.323 Call Stages

H.323 Discovery and Registration

H.323 Call Setup

Call Termination

H.323 Endpoint-to-Endpoint Signaling

Session Initiation Protocol

Key Benefits of Session Initiation Protocol

Session Initiation Protocol Components

Session Initiation Protocol Messages

Media Gateway Control Protocol

MGCP Connections


The Role of QoS in Packet-Switched Voice Networks

What Is Quality of Service


Solutions Fast Track

Frequently Asked Questions

Chapter 4 An Overview of Cisco’s VoIP Components


Exploring the Types of Voice Ports

Foreign Exchange Station Interface

Foreign Exchange Office Interface

E&M Interface

E1/T1 Voice Connectivity

Voice Modules and Cards

Voice Network Modules

Voice Interface Cards

Connecting VNMs and VICs to the Router

1700 Series Router Configurations

2600, 3600, and 3700 Series Router Configurations

7200 and 7500 Series Router Configurations

MC3810 Router Configurations

AS5350 and 5850 Universal Gateway Configuration

Cisco Catalyst 4000 and 6000 Series Switches

Cisco Catalyst 4200

VoIP Terminology


Bandwidth Consumption


Call Legs



Dial Peers

Dial Plans


Frame Relay

Gateways and Gatekeepers




Number Extension and Digit Translation



Serialization Delay








Solutions Fast Track

Frequently Asked Questions

Chapter 5 VoIP Configurations


Voice Port Cabling and Configuration

Port Numbering on the 1700 Series

Port Numbering on the 2600 and 3600 Series

Port Numbering on the MC3810 Series

Port Numbering on the 7200 Series

Port Numbering on the AS5x00 Series

LED Status

Configuring Voice Ports

Configuring FXO or FXS Voice Ports

Configuring E&M Ports

Configuring DID Ports

The Connection Command

Voice Port-Tuning Commands

Concepts of Delay and Echo

Fine-Tuning FXS/FXO Ports

Fine-Tuning E&M Ports

Configuring Dial Plans and Dial Peers

Call Legs: POTS versus Voice Network Dial Peers

Creating and Implementing Dial Plans

Configuring Dial Peers

Number Expansion

Direct Inward Dialing

Configuring Trunking


Tie Lines


Direct Voice Trunking versus Dial-Digit Interpretation

Supervisory Disconnect

Wink-Start Signaling versus Immediate-Start Signaling

Configuring ISDN for Voice

Configuring ISDN BRI Voice Ports

Configuring ISDN PRI Voice Ports

Configuring Q.931 Support

Configuring QSIG

Configuring CAS

Configuring CCS

Configuring T-CCS

Configuring Gateways and Gatekeepers

Configuring H.323 Gateway

Configuring H.323 Gatekeeper


Solutions Fast Track

Frequently Asked Questions

Chapter 6 Configuring QoS for VoIP


QoS Overview

Available QoS Options

Maximizing Bandwidth

Compressed Real-Time Transport Protocol


Packet Classification

IP Precedence

Policy Routing

Resource Reservation Protocol

Call Admission Control

RTP Priority

Traffic Shaping

Weighted Random Early Detection

Link Fragmentation and Interleaving

VoIP QoS Configuration Examples

Maximizing Bandwidth

Configuring cRTP

Configuring Queuing

Configuring Custom Queuing

Configuring Priority Queuing

Configuring Weighted Fair Queuing

Configuring Class-Based Weighted Fair Queuing

Configuring Packet Classification

Configuring RSVP

Configuring Priority Queuing with WFQ (IP RTP Priority)

Configuring Traffic Shaping

Configuring Congestion Avoidance with WRED

Configuring Link Fragmentation and Interleaving


Solutions Fast Track

Frequently Asked Questions

Chapter 7 Testing and Troubleshooting VoIP


A Basic Troubleshooting Methodology

Layer 1 Troubleshooting

Troubleshooting Equipment, from Powerup to Operating State

Troubleshooting Cabling

Troubleshooting Ports

Troubleshooting Other Physical Layer Issues

Layer 2 Troubleshooting

Troubleshooting Serial Interfaces

Troubleshooting Frame Relay

Troubleshooting Asynchronous Transfer Mode

Layer 3 Troubleshooting

Troubleshooting IP

Troubleshooting Dial Plans

Troubleshooting Voice Ports

Troubleshooting FXS and FXO Voice Ports

Troubleshooting E&M Voice Ports

Troubleshooting Dial Peers

Troubleshooting Signaling Errors

FXS/FXO signaling

E&M Signaling


Solutions Fast Track

Frequently Asked Questions

Chapter 8 Connecting PABXs with VoIP Scenarios


Collecting the Information

Gathering Information for Design Purposes

Compiling the Information

VoIP Corporation’s Tie-Line Replacement

Compiling the Information

Designing a Basic Tie-Line Replacement with VoIP

Basic Design Principles for Tie-Line Replacement

Designing the Basic Tie-Line Replacement

Configuring a Basic Tie-Line Replacement with VoIP

Configuration Details for the Basic Tie-Line Replacement

Configuring Advanced Trunking Scenarios

Advanced Trunking Options Overview

Configuring Advanced Trunking Options: Case Studies

Integrating Voice and Data

The Rationale for Integrating Voice and Data Networks

Integrating Voice and Data: Case Studies

Verifying and Testing the Solution

Testing and Verification Methodology

Testing the Deployed Solutions


Solutions Fast Track

Frequently Asked Questions

Chapter 9 Intra- and Interoffice VoIP Scenarios


Creating a Basic Intraoffice Dial Plan

What Is a Dial Plan

Collecting the Information

Designing the Dial Plan

Designing a Single-Router VoIP Network

Choosing the Hardware

Creating the Design Plan

Configuring a Single-Router VoIP Network

Reviewing the Design

Configuring the Router: Step by Step

Testing and Verification

Merging the PBX and VoIP Networks

Designing PBX Interconnect Trunks

Configuring the Router

Testing and Verification

Configuring a Multirouter Intraoffice VoIP Network

Extending the Dial Plan

Extending the Design

Configuring the Routers

Testing and Verification

Configuring VoIP for Interoffice Voice Communication

Extending the Dial Plan Again

Extending the Design

Configuring the Routers

Tuning the VoIP Network

Tuning the Design

Testing and Verification

Applying QoS to the VoIP Network

Designing the QoS Solution

Configuring the Routers for QoS

Testing and Verification


Solutions Fast Track

Frequently Asked Questions



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© Syngress 2002
13th September 2002
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