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Implementing Cisco Unified Communications Manager, Part 2 (CIPT2) (Authorized Self-Study Guide)

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Implementing Cisco Unified Communications Manager, Part 2 (CIPT2) (Authorized Self-Study Guide)

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  • Copyright 2009
  • Edition: 1st
  • eBook (Watermarked)
  • ISBN-10: 1-58705-617-8
  • ISBN-13: 978-1-58705-617-8

Authorized Self-Study Guide

Implementing Cisco Unified Communications Manager

Part 2 (CIPT2)

Foundation learning for CIPT2 exam 642-456

Chris Olsen

Implementing Cisco Unified Communications Manager, Part 2 (CIPT2), is a Cisco®-authorized, self-paced learning tool for CCVP® foundation learning. This book provides you with the knowledge needed to install and configure a Cisco Unified Communications Manager solution in a multisite environment. By reading this book, you will gain a thorough understanding of how to apply a dial plan for a multisite environment, configure survivability for remote sites during WAN failure, implement solutions to reduce bandwidth requirements in the IP WAN, enable Call Admission Control (CAC) and automated alternate routing (AAR), and implement device mobility, extension mobility, Cisco Unified Mobility, and voice security.

This book focuses on Cisco Unified CallManager Release 6.0, the call routing and signaling component for the Cisco Unified Communications solution. It also includes H.323 and Media Gateway Control Protocol (MGCP) gateway implementation, the use of a Cisco Unified Border Element, and configuration of Survivable Remote Site Telephony (SRST), different mobility features, and voice security.

Whether you are preparing for CCVP certification or simply want to gain a better understanding of deploying Cisco Unified Communications Manager in a multisite environment, you will benefit from the foundation information presented in this book.

Implementing Cisco Unified Communications Manager, Part 2 (CIPT2), is part of a recommended learning path from Cisco that includes simulation and hands-on training from authorized Cisco Learning Partners and self-study products from Cisco Press. To find out more about instructor-led training, e-learning, and hands-on instruction offered by authorized Cisco Learning Partners worldwide, please visit www.cisco.com/go/authorizedtraining.

Chris Olsen is the president and founder of System Architects, Inc., a training and consulting firm specializing in Cisco, Microsoft, and Novell networking;

IP telephony; and information technologies. Chris has been teaching and consulting in the networking arena for more than 15 years. He currently holds his CCNA®, CCDA®, CCNP®, and CCVP certifications, as well as various Microsoft certifications.

  • Identify multisite issues and deployment solutions
  • Implement multisite connections
  • Apply dial plans for multisite deployments
  • Examine remote site redundancy options
  • Deploy Cisco Unified Communications Manager Expressin SRST mode
  • Implement bandwidth management, call admission control (CAC), and call applications on Cisco IOS® gateways
  • Configure device, extension mobility, and Cisco unified mobility
  • Understand cryptographic fundamentals and PKI
  • Implement security in Cisco Unified Communications Manager

This volume is in the Certification Self-Study Series offered by Cisco Press®. Books in this series provide officially developed self-study solutions to help networking professionals understand technology implementations and prepare for the Cisco Career Certifications examinations.

Category: Cisco Unified Communications Manager 6.0

Covers: CIPT2 Exam 642-456

Sample Content

Table of Contents

Foreword xx
Introduction xxi

Chapter 1 Identifying Issues in a Multisite Deployment 3

Chapter Objectives 3
Multisite Deployment Challenge Overview 3
Quality Challenges 5
Bandwidth Challenges 6
Availability Challenges 8
Dial Plan Challenges 9
    Overlapping and Nonconsecutive Numbers 12
    Fixed Versus Variable-Length Numbering Plans 13
    Variable-Length Numbering, E.164 Addressing, and DID 15
    Optimized Call Routing and PSTN Backup 15
NAT and Security Issues 17
Chapter Summary 18
References 19
Review Questions 19

Chapter 2 Identifying Multisite Deployment Solutions 23
Chapter Objectives 23
Multisite Deployment Solution Overview 24
Quality of Service 24
    QoS Advantages 25
Solutions to Bandwidth Limitations 26
    Low-Bandwidth Codecs and RTP-Header Compression 28
    Codec Configuration in CUCM 29
    Disabled Annunciator 29
    Local Versus Remote Conference Bridges 30
    Mixed Conference Bridge 30
    Transcoders 31
    Multicast MOH from the Branch Router Flash 33
Availability 37
    PSTN Backup 38
    MGCP Fallback 39
    Fallback for IP Phones 40
    Using CFUR During WAN Failure 42
    Using CFUR to Reach Users on Cell Phones 42
    AAR and CFNB 43
Mobility Solutions 44
Dial Plan Solutions 44
    Dial Plan Components in Multisite Deployments 45
NAT and Security Solutions 46
    Cisco Unified Border Element in Flow-Through Mode 46
Summary 48
References 48
Review Questions 48

Chapter 3 Implementing Multisite Connections 53
Chapter Objectives 53
Examining Multisite Connection Options 54
    MGCP Gateway Characteristics 55
    H.323 Gateway Characteristics 55
    SIP Trunk Characteristics 56
H.323 Trunk Overview 56
    H.323 Trunk Comparison 57
MGCP Gateway Implementation 59
H.323 Gateway Implementation 61
    Cisco IOS H.323 Gateway Configuration 63
    CUCM H.323 Gateway Configuration 64
Trunk Implementation Overview 65
    Gatekeeper-Controlled ICT and H.225 Trunk Configuration 66
    Implementing SIP Trunks 67
    Implementing Intercluster and H.225 Trunks 69
CUCM Gatekeeper-Controlled ICT and H.225 Trunk Configuration 70
Summary 73
References 73
Review Questions 74

Chapter 4 Implementing a Dial Plan for Multisite Deployments 79
Chapter Objectives 79
Multisite Dial Plan Overview 79
Implementing Access and Site Codes 80
    Implementing Site Codes for On-Net Calls 80
    Digit-Manipulation Requirements When Using Access and Site Codes 80
    Access and Site Code Requirements for Centralized Call-
        Processing Deployments 82
Implementing PSTN Access 83
    Transformation of Incoming Calls Using ISDN TON 84
Implementing Selective PSTN Breakout 86
    Configure IP Phones to Use Remote Gateways for Backup PSTN Access 87
    Considerations When Using Backup PSTN Gateways 88
Implementing PSTN Backup for On-Net Intersite Calls 89
    Digit-Manipulation Requirements for PSTN Backup of On-Net Intersite Calls 89
Implementing Tail-End Hop-Off 91
    Considerations When Using TEHO 92
Summary 92
Review Questions 93

Chapter 5 Examining Remote-Site Redundancy Options 97
Chapter Objectives 97
Remote-Site Redundancy Overview 98
Remote-Site Redundancy Technologies 99
Basic Cisco Unified SRST Usage 101
    Cisco Unified SIP SRST Usage 101
    CUCME in SRST Mode Usage 102
    Cisco Unified SRST Operation 102
    SRST Function of Switchover Signaling 103
    SRST Function of the Call Flow After Switchover 104
    SRST Function of Switchback 105
    SRST Timing 105
MGCP Fallback Usage 107
    MGCP Fallback Operation 107
    MGCP Gateway Fallback During Switchover 108
    MGCP Gateway Fallback During Switchback 109
    MGCP Gateway Fallback Process 110
Cisco Unified SRST Versions and Feature Support 112
    SRST 4.0 Platform Density 112
Dial Plan Requirements for MGCP Fallback and SRST Scenarios 113
    Ensuring Connectivity for Remote Sites 114
    Ensuring Connectivity from the Main Site Using Call Forward Unregistered 115
    CFUR Considerations 115
    Keeping Calling Privileges Active in SRST Mode 117
    SRST Dial Plan Example 117
Summary 118
References 119
Review Questions 119

Chapter 6 Implementing Cisco Unified SRST and MGCP Fallback 123
Chapter Objectives 123
MGCP Fallback and SRST Configuration 124
    Configuration Requirements for MGCP Fallback and Cisco Unified SRST 124
Cisco Unified SRST Configuration in CUCM 125
    SRST Reference Definition 125
    CUCM Device Pool 126
SRST Configuration on the Cisco IOS Gateway 126
    SRST Activation Commands 127
    SRST Phone Definition Commands 127
    SRST Performance Commands 128
    Cisco Unified SRST Configuration Example 129
MGCP-Gateway-Fallback Configuration on the Cisco IOS Gateway 130
    MGCP Fallback Activation Commands 131
    MGCP Fallback Configuration Example 131
Dial Plan Configuration for SRST Support in CUCM 132
SRST Dial Plan of CFUR and CSS 133
SRST Dial Plan: Max Forward UnRegistered Hops to DN 134
MGCP Fallback and SRST Dial Plan Configuration in the Cisco IOS Gateway 135
SRST Dial Plan Components for Normal Mode Analogy 135
SRST Dial Plan Dial Peer Commands 136
SRST Dial Plan Commands: Open Numbering Plans 140
SRST Dial Plan Voice Translation-Profile Commands for Digit Manipulation 142
    SRST Dial Plan Voice Translation-Rule Commands for
        Number Modification 143
    SRST Dial Plan Profile Activation Commands for Number Modification 144
SRST Dial Plan Class of Restriction Commands 145
    SRST Dial Plan Example 146
Telephony Features Supported by Cisco Unified SRST 150
    Special Requirements for Voice-Mail Integration Using Analog Interfaces 151
Summary 152
References 152
Review Questions 152

Chapter 7 Implementing Cisco Unified Communications Manager Express in
Chapter Objectives 157
CUCME Overview 158
    CUCME in SRST Mode 158
    Standalone CUCME Versus CUCM and CUCME in SRST Mode 159
CUCME Features 161
    CUCME Features and Versions 161
    Other CUCME Features 162
General Configuration of CUCME 163
    CUCME Basic Configuration 164
    CUCME Configuration Providing Phone Loads 165
    CUCME Configuration for Music On Hold 165
Configuring CUCME in SRST Mode 167
Phone-Provisioning Options 168
Advantages of CUCME SRST 169
Phone Registration Process 169
Configuring CUCME for SRST 170
    CUCME for SRST Mode Configuration 172
Summary 173
References 173
Review Questions 173

Chapter 8 Implementing Bandwidth Management 177
Chapter Objectives 177
Bandwidth Management Overview 177
CUCM Codec Configuration 178
    Review of CUCM Codecs 179
Local Conference Bridge Implementation 181
Transcoder Implementation 184
    Implementing a Transcoder at the Main Site 185
    Configuration Procedure for Implementing Transcoders 187
Multicast MOH from Branch Router Flash Implementation 191
    Implementing Multicast MOH from Branch Router Flash 192
    Configuration Procedure for Implementing Multicast MOH from Branch Router
        Flash 194
Summary 202
References 203
Review Questions 203

Chapter 9 Implementing Call Admission Control 207
Chapter Objectives 207
Call Admission Control Overview 208
Call Admission Control in CUCM 208
Locations 209
    Locations: Hub-and-Spoke Topology 210
    Locations: Full-Mesh Topology 211
    Configuration Procedure for Implementing Locations-Based CAC 212
    Locations Configuration Example of a Hub-and-Spoke Topology 212
RSVP-Enabled Locations 215
    Three Call Legs with RSVP-Enabled Locations 215
    Characteristics of Phone-to-RSVP Agent Call Legs 216
    Characteristics of RSVP Agent-to-RSVP Agent Call Legs 217
    RSVP Basic Operation 217
    RSVP-Enabled Location Configuration 220
    Configuration Procedure for Implementing RSVP-Enabled Locations-Based
        CAC 221
    Step 1: Configure RSVP Service Parameters 221
    Step 2: Configure RSVP Agents in Cisco IOS Software 225
    Step 3: Add RSVP Agents to CUCM 227
    Step 4: Enable RSVP Between Location Pairs 228
Automated Alternate Routing 230
    Automated Alternate Routing Characteristics 231
    AAR Example 231
    AAR Considerations 233
    AAR Configuration Procedure 234
H.323 Gatekeeper CAC 239
    H.323 Gatekeeper Used for Call Routing for Address Resolution Only 240
    Using an H.323 Gatekeeper for CAC 243
    H.323 Gatekeeper Also Used for Call Admission Control 245
    Provide PSTN Backup for Calls Rejected by CAC 247
    Configuration Procedure for Implementing H.323 Gatekeeper-Controlled Trunks
        with CAC 248
Summary 249
References 249
Review Questions 250

Chapter 10 Implementing Call Applications on Cisco IOS Gateways 255
Chapter Objectives 255
Call Applications Overview 256
    Tcl Scripting Language 256
    VoiceXML Markup Language 257
    The Analogy Between HTML and VoiceXML 258
    Advantages of VoiceXML 259
Cisco IOS Call Application Support 259
    Tcl Versus VoiceXML Features in Cisco IOS 260
    Cisco IOS Call Application Support Requirements 261
    Examples of Cisco IOS Call Applications Available for
    Download at Cisco.com 262
    Call Application Auto-Attendant Script Example 263
    Remote-Site Gateway Using an Auto-Attendant Script
    During a WAN Failure 265
    Auto-Attendant Tcl Script Flowchart 266
Call Application Configuration 267
    Step 1: Download the Application from Cisco.com 268
    Step 2: Upload and Uncompress the Script to Flash 268
    Step 3a: Configure the Call Application Service Definition 269
    Step 3b: Configure the Call Application Service Parameters 269
    Step 4: Associate the Call Application with a Dial Peer 270
    Call Application Configuration Example 270
Summary 272
References 272
Review Questions 272

Chapter 11 Implementing Device Mobility 277
Chapter Objectives 277
Issues with Devices Roaming Between Sites 277
    Issues with Roaming Devices 278
    Device Mobility Solves Issues of Roaming Devices 279
Device Mobility Overview 280
    Dynamic Device Mobility Phone Configuration Parameters 280
    Device Mobility Dynamic Configuration by Location-Dependent
    Device Pools 282
Device Mobility Configuration Elements 283
    The Relationship Between Device Mobility Configuration Elements 284
Device Mobility Operation 285
    Device Mobility Operation Flowchart 286
    Device Mobility Considerations 289
    Review of Line and Device CSSs 289
    Device Mobility and CSSs 290
    Examples of Different Call-Routing Paths Based on Device Mobility Groups and
        TEHO 290
Device Mobility Configuration 293
    Steps 1 and 2: Configure Physical Locations and Device Mobility Groups 293
    Step 3: Configure Device Pools 293
    Step 4: Configure Device Mobility Infos 294
    Step 5a: Set the Device Mobility Mode CCM Service Parameter 295
    Step 5b: Set the Device Mobility Mode for Individual Phones 296
Summary 297
References 297
Review Questions 297

Chapter 12 Implementing Extension Mobility 301
Chapter Objectives 301
Issues with Users Roaming Between Sites 301
    Issues with Roaming Users 302
    Extension Mobility Solves Issues of Roaming Users 303
CUCM Extension Mobility Overview 303
    Extension Mobility: Dynamic Phone Configuration Parameters 304
    Extension Mobility with Dynamic Phone Configuration by Device Profiles 305
CUCM Extension Mobility Configuration Elements 306
    The Relationship Between Extension Mobility Configuration Elements 307
CUCM Extension Mobility Operation 308
    Issues in Environments with Different Phone Models 310
    Extension Mobility Solution to Phone Model Differences 310
    Extension Mobility and Calling Search Spaces (CSS) 311
    Alternatives to Mismatching Phone Models and CSS Implementations 312
CUCM Extension Mobility Configuration 313
    Step 1: Activate the Cisco Extension Mobility Feature Service 313
    Step 2: Set Cisco Extension Mobility Service Parameters 314
    Step 3: Add the Cisco Extension Mobility Phone Service 315
    Step 4: Create Default Device Profiles 315
    Step 5a: Create Device Profiles 316
    Step 5b: Subscribe the Device Profile to the Extension Mobility Phone
        Service 316
    Step 6: Associate Users with Device Profiles 318
    Step 7a: Configure Phones for Cisco Extension Mobility 318
    Step 7b: Subscribe the Phone to the Extension Mobility Phone Service 320
Summary 320
References 321
Review Questions 321

Chapter 13 Implementing Cisco Unified Mobility 327
Chapter Objectives 327
Cisco Unified Mobility Overview 327
    Mobile Connect and Mobile Voice Access Characteristics 328
    Cisco Unified Mobility Features 329
Cisco Unified Mobility Call Flow 330
    Mobile Connect Call Flow of Internal Calls Placed from a Remote Phone 330
    Mobile Voice Access Call Flow 331
Cisco Unified Mobility Components 332
    Cisco Unified Mobility Configuration Elements 333
    Shared Line Between the Phone and the Remote Destination Profile 335
    Relationship Between Cisco Unified Mobility Configuration Elements 336
Cisco Unified Mobility Configuration 338
    Configuring Mobile Connect 338
    Configuring Mobile Voice Access 348
Summary 355
References 355
Review Questions 355

Chapter 14 Understanding Cryptographic Fundamentals and PKI 359
Chapter Objectives 359
Cryptographic Services 359
Symmetric Versus Asymmetric Encryption 362
    Algorithm Example: AES 363
    Asymmetric Encryption 364
    Algorithm Example: RSA 365
    Two Ways to Use Asymmetric Encryption 366
Hash-Based Message Authentication Codes 366
    Algorithm Example: SHA-1 367
    No Integrity Provided by Pure Hashing 368
    Hash-Based Message Authentication Code, or “Keyed Hash” 369
Digital Signatures 370
Public Key Infrastructure 372
    Symmetric Key Distribution Protected by Asymmetric Encryption 372
    Public Key Distribution in Asymmetric Cryptography 373
    PKI as a Trusted Third-Party Protocol 374
    PKI: Generating Key Pairs 374
    PKI: Distributing the Public Key of the Trusted Introducer 374
    PKI: Requesting Signed Certificates 376
    PKI: Signing Certificates 376
    PKI: Providing Entities with Their Certificates 377
    PKI: Exchanging Public Keys Between Entities Using Their
        Signed Certificates 378
    PKI Entities 379
    X.509v3 Certificates 380
PKI Example: SSL on the Internet 381
    Internet Web Browser: Embedded Internet-CA Certificates 382
    Obtaining the Authentic Public Key of the Web Server 383
    Web Server Authentication 384
    Exchanging Symmetric Session Keys 385
    Session Encryption 386
Summary 387
References 387
Review Questions 387

Chapter 15 Understanding Native CUCM Security Features and CUCM PKI 391
Chapter Objectives 391
CUCM Security Features Overview 391
    CUCM Security Feature Support 393
    Cisco Unified Communications Security Considerations 394
CUCM IPsec Support 395
    IPsec Scenarios in Cisco Unified Communications 395
    IPsec on Network Infrastructure Devices 397
Signed Phone Loads 397
SIP Digest Authentication 398
    SIP Digest Authentication Configuration Procedure 399
    SIP Digest Authentication Configuration Example 399
SIP Trunk Encryption 400
    SIP Trunk Encryption Configuration Procedure 401
    SIP Trunk Encryption Configuration 401
    Self-Signed Certificates 402
    Manufacturing Installed Certificates 403
    Locally Significant Certificates 403
    Multiple PKI Roots in CUCM Deployments 404
    Cisco Certificate Trust List 405
    Cisco CTL Client Function 406
    Initial CTL Download 408
    IP Phone Verification of a New Cisco CTL 409
    IP Phone Usage of the CTL 410
    PKI Topology with Secure SRST 410
    Trust Requirements with Secure SRST 412
    Secure SRST: Certificate Import: CUCM 412
    Secure SRST: Certificate Import: Secure SRST Gateway 413
    Certificate Usage in Secure SRST 414
Summary 415
References 416
Review Questions 416

Chapter 16 Implementing Security in CUCM 419
Chapter Objectives 419
Enabling PKI-Based Security Features in CUCM 420
    Configuration Procedure for PKI-Based CUCM Security Features 421
    Enabling Services Required for Security 422
    Installing the Cisco CTL Client 422
    Cisco CTL Client Usage 423
    Setting the Cluster Security Mode 424
    Updating the CTL 425
CAPF Configuration and LSC Enrollment 425
    CAPF Service Configuration Parameter 426
    CAPF Phone Configuration Options 426
    First-Time Installation of a Certificate with a Manually Entered Authentication
        String 428
    Certificate Upgrade Using an Existing MIC 429
    Generating a CAPF Report to Verify LSC Enrollment 430
    Finding Phones by Their LSC Status 431
Signed and Encrypted Configuration Files 431
    Encrypted Configuration Files 432
    Obtaining Phone Encrypted Configuration Files 433
    Configuring Encrypted Configuration Files 434
    Phone Security Profiles 434
    Default SCCP Phone Security Profiles 435
    Configuring TFTP Encrypted Configuration Files 436
Secure Signaling 436
    Certificate Exchange in TLS 438
    Server-to-Phone Authentication 438
    Phone-to-Server Authentication 439
    TLS Session Key Exchange 440
    Secure Signaling Using TLS 441
Secure Media Transmission Between Cisco IP Phones 441
    SRTP Protection 442
    SRTP Packet Format 443
    SRTP Encryption 443
    SRTP Authentication 444
    Secure Call Flow Summary 445
    Configuring IP Phones to Use Secure Signaling and Media Exchange 446
    The Actual Security Mode Depends on the Configuration of Both Phones 447
Secure Media Transmission to H.323 and MGCP Gateways 447
    H.323 SRTP CUCM 448
    SRTP to MGCP Gateways 450
Secure Conferencing 450
    Secure Conferencing Considerations 451
    Secure Conferencing Configuration Procedure 452
Summary 458
References 459
Review Questions 459

Appendix A Answers to Chapter Review Questions 465

Index 472


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