Table Of Contentptg6843614
Implementing Cisco
Unified Communications
Manager, Part 2 (CIPT2)
Foundation Learning Guide
Chris Olsen
ptg6843614
Cisco Press
800 East 96th Street
Indianapolis, IN 46240
ii Implementing Cisco Unified Communications Manager, Part 2 (CIPT2) Foundation Learning Guide
Implementing Cisco Unified Communications
Manager, Part 2 (CIPT2) Foundation Learning Guide
CCNP Voice CIPT2 642-457
Chris Olsen
Copyright© 2012 Cisco Systems, Inc.
Published by:
Cisco Press
800 East 96th Street
Indianapolis, IN 46240 USA
All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying, recording, or by any information storage and retrieval
system, without written permission from the publisher, except for the inclusion of brief quotations in a
review.
Printed in the United States of America 1 2 3 4 5 6 7 8 9 0
First Printing August 2011
Library of Congress Cataloging-in-Publication Number is on file.
ISBN-13: 978-1-58714-253-6
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ISBN-10: 1-58714-253-8
Warning and Disclaimer
This book is designed to provide information about Cisco Unified Communications administration and to
provide test preparation for the CIPT Part 2 version 8 exam (CCNP Voice CIPT2 642-457), which is part
of the CCNP Voice certification. Every effort has been made to make this book as complete and accurate
as possible, but no warranty or fitness is implied.
The information is provided on an “as is” basis. The author, Cisco Press, and Cisco Systems, Inc., shall have
neither liability nor responsibility to any person or entity with respect to any loss or damages arising from
the information contained in this book or from the use of the discs or programs that may accompany it.
The opinions expressed in this book belong to the author and are not necessarily those of Cisco Systems, Inc.
Trademark Acknowledgments
All terms mentioned in this book that are known to be trademarks or service marks have been appropri-
ately capitalized. Cisco Press or Cisco Systems, Inc. cannot attest to the accuracy of this information. Use
of a term in this book should not be regarded as affecting the validity of any trademark or service mark.
iii
Corporate and Government Sales
The publisher offers excellent discounts on this book when ordered in quantity for bulk purchases or spe-
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iv Implementing Cisco Unified Communications Manager, Part 2 (CIPT2) Foundation Learning Guide
About the Author
Chris Olsen, CCSI, CCVP, and CCNP, along with numerous other Cisco voice and data
center specializations, Microsoft, VMware, and Novell certifications, has been an inde-
pendent IT and telephony consultant, author, and technical editor for more than 15 years.
He has been a technical trainer for more than 19 years and has taught more than 60 dif-
ferent courses for Cisco, Microsoft, VMware, and Novell. For the last 7 years, he has spe-
cialized in Cisco, and recently, Microsoft Unified Communications along with VMware
virtualization and Cisco data-center technologies. He has done a wide array of IT and
telephony consulting for many different companies. Chris and his wife, Antonia, live in
Chicago and Mapleton, Illinois. He can be reached at
v
Dedication
This book is dedicated to my wonderful wife, Antonia, whose constant love and tireless
commitment to making my life better gave me the time to write this book. I am forever
grateful.
Acknowledgments
I want to thank the entire team at Global Knowledge for its excellent support and c-re
ation of a high-quality learning environment. Thanks also to the staff at Cisco Press for
its excellent support and advice.
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vi Implementing Cisco Unified Communications Manager, Part 2 (CIPT2) Foundation Learning Guide
Contents at a Glance
Introduction xxi
Chapter 1 Identifying Issues in a Multisite Deployment 1
Chapter 2 Identifying Multisite Deployment Solutions 23
Chapter 3 Implementing Multisite Connections 57
Chapter 4 Implementing a Dial Plan for International Multisite Deployments 83
Chapter 5 Examining Remote-Site Redundancy Options 123
Chapter 6 Implementing Cisco Unified SRST and MGCP Fallback 151
Chapter 7 Implementing Cisco Unified Communications Manager Express
(CUCME) in SRST Mode 181
Chapter 8 Implementing Bandwidth Management 201
Chapter 9 Implementing Call Admission Control 233
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Chapter 10 Implementing Device Mobility 289
Chapter 11 Implementing Extension Mobility 317
Chapter 12 Implementing Service Advertisement Framework
(SAF) and Call Control Discovery (CCD) 343
Answers Appendix 395
Index 399
vii
Contents
Introduction xxi
Chapter 1 Identifying Issues in a Multisite Deployment 1
Multisite Deployment Challenge Overview 1
Quality Challenges 2
Bandwidth Challenges 3
Availability Challenges 6
Dial Plan Challenges 7
Overlapping and Nonconsecutive Numbers 9
Fixed Versus Variable-Length Numbering Plans 10
Variable-Length Numbering, E.164 Addressing, and DID 10
Detection of End of Dialing in Variable-Length Numbering Plans 12
Optimized Call Routing and PSTN Backup 14
Various PSTN Requirements 15
Issues Caused by Different PSTN Dialing 16
Dial Plan Scalability Issues 17 ptg6843614
NAT and Security Issues 17
Summary 19
References 19
Review Questions 19
Chapter 2 Identifying Multisite Deployment Solutions 23
Multisite Deployment Solution Overview 23
Quality of Service 24
QoS Advantages 25
Solutions to Bandwidth Limitations 26
Low-Bandwidth Codecs and RTP-Header Compression 27
Codec Configuration in CUCM 28
Disabled Annunciator 29
Local Versus Remote Conference Bridges 30
Transcoders 30
Mixed Conference Bridge 32
Multicast MOH from the Branch Router Flash 33
Preventing Too Many Calls by CAC 37
Availability 38
PSTN Backup 39
viii Implementing Cisco Unified Communications Manager, Part 2 (CIPT2) Foundation Learning Guide
MGCP Fallback 39
Fallback for IP Phones 41
Using CFUR to Reach Remote Site Cisco IP Phones During WAN
Failure 42
Using CFUR to Reach Users of Unregistered Software IP Phones on
Their Cell Phones 43
AAR and CFNB 44
Mobility Solutions 44
Dial Plan Solutions 45
Dial Plan Components in Multisite Deployments 45
Globalized Call-Routing Overview 46
Globalized Call Routing: Three Phases 48
Globalized Call Routing Advantages 50
NAT and Security Solutions 51
CUBE in Flow-Through Mode 51
Summary 52
References 53 ptg6843614
Review Questions 53
Chapter 3 Implementing Multisite Connections 57
Examining Multisite Connection Options 57
CUCM Connection Options Overview 58
Cisco IOS Gateway Protocol Functions Review 59
Cisco IOS Gateway Protocol Comparison Review 60
SIP Trunk Characteristics 60
H.323 Trunk Overview 61
MGCP Gateway Implementation Review 64
Cisco IOS Gateway MGCP Configuration Methods Review 65
Configuring Cisco IOS Gateway for MGCP: Example 66
H.323 Gateway Implementation 68
Cisco IOS H.323 Gateway Configuration 69
CUCM H.323 Gateway Configuration 71
Trunk Implementation Overview 71
Gatekeeper-Controlled ICT and H.225 Trunk Configuration 72
Trunk Types Used by Special Applications 73
Implementing SIP Trunks 74
Implementing Intercluster and H.225 Trunks 75
ix
CUCM Gatekeeper-Controlled ICT and H.225 Trunk Configuration 77
Summary 79
References 79
Review Questions 80
Chapter 4 Implementing a Dial Plan for International Multisite Deployments 83
Multisite Dial Plan Overview 84
Dial Plan Requirements for Multisite Deployments with Distributed Call
Processing 84
Dial Plan Scalability Solutions 85
Implementing Site Codes for On-Net Calls 86
Digit-Manipulation Requirements When Using Access and Site Codes 87
Access and Site Code Requirements for Centralized Call-Processing
Deployments 88
Implementing PSTN Access in Cisco IOS Gateways 90
Transformation of Incoming Calls Using ISDN TON 90
Implementing Selective PSTN Breakout 93
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Configuring IP Phones to Use Local PSTN Gateway 93
Implementing PSTN Backup for On-Net Intersite Calls 95
Digit-Manipulation Requirements for PSTN Backup of On-Net Intersite
Calls 95
Implementing TEHO 97
TEHO Example Without Local Route Groups 98
TEHO Example with Local Route Groups 100
Implementing Globalized Call Routing 102
Globalized Call Routing: Number Formats 103
Normalization of Localized Call Ingress on Gateways 106
Normalization of Localized Call Ingress from Phones 107
Localized Call Egress at Gateways 108
Localized Call Egress at Phones 110
Globalized Call-Routing Example: Emergency Dialing 112
Considering Globalized Call-Routing Interdependencies 115
Globalized Call Routing—TEHO Advantages 116
Globalized Call Routing—TEHO Example 116
Summary 118
References 118
Review Questions 119
