Implementing Cisco Unified Communications Manager, Part 2 (CIPT2) Foundation Learning Guide

Chris Olsen, CCSI, CCVP, and CCNP, along with numerous other Cisco voice and data center specializations, Microsoft, VMware, and Novell certifications, has been an independent 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 different courses for Cisco, Microsoft, VMware, and Novell. For the last 7 years, he has specialized 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 chrisolsen@earthlink.net.

    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

        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

        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

    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

    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

        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

Chapter 5 Examining Remote-Site Redundancy Options 123

    Remote-Site Redundancy Overview 123

    Remote-Site Redundancy Technologies 124

    MGCP Fallback Usage 126

    Basic Cisco Unified SRST Usage 127

        Cisco Unified SIP SRST Usage 127

        CUCME in SRST Mode Usage 128

        Cisco Unified SRST Operation 128

        SRST Function of Switchover Signaling 129

        SRST Function of the Call Flow After Switchover 130

        SRST Function of Switchback 131

        SRST Timing 132

        MGCP Fallback Operation 133

        MGCP Gateway Fallback During Switchover 133

        MGCP Gateway Fallback During Switchback 134

        MGCP Gateway Fallback Process 136

    Cisco Unified SRST Versions and Feature Support 137

        SRST 4.0 Platform Density 138

    Plus (+) Prefix and E.164 Support in Cisco Unified SRST 138

    Support for Multiple MOH Sources 139

        Dial Plan Requirements for MGCP Fallback and SRST Scenarios 139

        Ensuring Connectivity for Remote Sites 140

        Ensuring Connectivity from the Main Site Using Call Forward Unregistered 141

        CFUR Considerations 142

        CFUR Interaction with Globalized Call Routing 143

        CFUR Example Without Globalized Call Routing 143

        CFUR Example with Globalized Call Routing 145

        Keeping Calling Privileges Active in SRST Mode 145

        SRST Dial Plan Example 146

    Summary 147

    References 147

    Review Questions 147

Chapter 6 Implementing Cisco Unified SRST and MGCP Fallback 151

    MGCP Fallback and SRST Configuration 151

        Configuration Requirements for MGCP Fallback and Cisco Unified SRST 152

    Cisco Unified SRST Configuration in CUCM 152

        SRST Reference Definition 153

        CUCM Device Pool 153

    SRST Configuration on the Cisco IOS Gateway 154

        SRST Activation Commands 154

        SRST Phone Definition Commands 155

        SRST Performance Commands 156

        Cisco Unified SRST Configuration Example 157

    MGCP-Gateway-Fallback Configuration on the Cisco IOS Gateway 158

        MGCP Fallback Activation Commands 158

        MGCP Fallback Configuration Example 159

    Dial Plan Configuration for SRST Support in CUCM 160

    SRST Dial Plan of CFUR and CSS 161

    SRST Dial Plan: Max Forward UnRegistered Hops to DN 162

    MGCP Fallback and SRST Dial Plan Configuration in the Cisco IOS Gateway 163

    SRST Dial Plan Components for Normal Mode Analogy 163

    Cisco Unified SRST Dial Plan Dial Peer Commands 164

    SRST Dial Plan Commands: Open Numbering Plans 167

    SRST Dial Plan Voice Translation-Profile Commands for Digit Manipulation 170

        SRST Dial Plan Voice Translation-Rule Commands for Number Modification 171

        SRST Dial Plan Profile Activation Commands for Number Modification 172

    SRST Dial Plan Class of Restriction Commands 173

        SRST Dial Plan Example 173

    Summary 178

    References 178

    Review Questions 179

Chapter 7 Implementing Cisco Unified Communications Manager Express (CUCME) in SRST Mode 181

    CUCME Overview 181

        CUCME in SRST Mode 183

        Standalone CUCME Versus CUCM and CUCME in SRST Mode 183

    CUCME Features 185

        CUCME Features 186

        Other CUCME Features 186

    General Configuration of CUCME 187

        CUCME Basic Configuration 188

        CUCME Configuration Providing Phone Loads 189

        CUCME Configuration for Music On Hold 190

        Additional MOH Sources 191

    Configuring CUCME in SRST Mode 192

    Phone-Provisioning Options 193

    Advantages of CUCME SRST 194

    Phone Registration Process 195

    Configuring CUCME for SRST 195

        CUCME for SRST Mode Configuration 197

    Summary 198

    Reference 198

    Review Questions 198

Chapter 8 Implementing Bandwidth Management 201

    Bandwidth Management Overview 201

    CUCM Codec Configuration 202

        Review of CUCM Codecs 203

    Local Conference Bridge Implementation 205

    Transcoder Implementation 208

        Implementing a Transcoder at the Main Site 209

        Configuration Procedure for Implementing Transcoders 211

        Step 1: Add a Transcoder Resource in CUCM 211

        Step 2: Configure the Transcoder Resource in Cisco IOS Software 212

    Multicast MOH from Remote Site Router Flash Implementation 215

        Multicast MOH from Remote Site Router Flash Region Considerations 216

        Multicast MOH from Remote Site Router Flash Address and Port Considerations 216

        Multicast MOH: Address and Port Increment Example 217

        Implementing Multicast MOH from Remote Site Router Flash 219

        Configuration Procedure for Implementing Multicast MOH from the Remote Site Router Flash 221

        Step 1: Enable Multicast Routing on Cisco IOS Routers 222

        Step 2a: Configure MOH Audio Sources for Multicast MOH 223

        Step 2b: Configure Multicast MOH in CUCM 223

        Step 2c: Enabling Multicast MOH at the Media Resource Groups 225

        Step 3: Enable Multicast MOH from Branch Router Flash at the Branch Router 226

        Step 4a: Configure the Maximum Hops to Be Used for MOH RTP Packets 227

        Step 4b: Use an IP ACL at the IP WAN Router Interface 227

        Step 4c: Disable Multicast Routing on the IP WAN Router Interface 228

    Summary 229

    Reference 229

    Review Questions 230

Chapter 9 Implementing Call Admission Control 233

    CAC Overview 234

    CAC in CUCM 234

    Standard Locations 235

        Locations: Hub-and-Spoke Topology 236

        Locations: Full-Mesh Topology 237

        Configuration Procedure for Implementing Locations-Based CAC 238

        Locations Configuration Example of a Hub-and-Spoke Topology 238

        Step 1: Configure Locations 239

        Step 2: Assign Locations to Devices 240

        RSVP-Enabled Locations 241

        Three Call Legs with RSVP-Enabled Locations 241

        Characteristics of Phone-to-RSVP Agent Call Legs 242

        Characteristics of RSVP Agent-to-RSVP Agent Call Legs 243

        RSVP Basic Operation 243

        RSVP-Enabled Location Configuration 245

        Configuration Procedure for Implementing RSVP-Enabled Locations-Based CAC 246

        Step 1: Configure RSVP Service Parameters 247

        Step 2: Configure RSVP Agents in Cisco IOS Software 250

        Step 3: Add RSVP Agents to CUCM 252

        Step 4: Enable RSVP Between Location Pairs 253

        Automated Alternate Routing 255

        AAR Characteristics 256

        AAR Example Without Local Route Groups and Globalized Numbers 257

        AAR Example with Local Route Groups and Globalized Numbers 258

        AAR Considerations 259

        AAR Configuration Procedure 260

        Step 1: Configure AAR Service Parameters 261

        Step 2: Configure Partitions and CSSs 261

        Step 3: Configure AAR Groups 261

        Step 4: Configure Phones for AAR 262

        SIP Preconditions 264

        CAC Without SIP Preconditions 265

        CAC with SIP Preconditions 265

        SIP Preconditions Operation 266

        SIP Preconditions Call Flow Summary 267

        Fallback from End-to-End RSVP to Local RSVP 269

        SIP Preconditions Configuration Procedure 270

        Step 2a: Configure SIP Profile 271

        Step 2b: Apply SIP Profile to Trunk 272

        H.323 Gatekeeper CAC 273

        H.323 Gatekeeper Used for Call Routing for Address Resolution Only 274

        Using an H.323 Gatekeeper for CAC 277

        H.323 Gatekeeper Also Used for CAC 279

        Provide PSTN Backup for Calls Rejected by CAC 281

        Configuration Procedure for Implementing H.323 Gatekeeper-Controlled Trunks with CAC 282

    Summary 283

    References 283

    Review Questions 284

Chapter 10 Implementing Device Mobility 289

    Issues with Devices Roaming Between Sites 289

        Issues with Roaming Devices 290

        Device Mobility Solves Issues of Roaming Devices 291

    Device Mobility Overview 292

        Dynamic Device Mobility Phone Configuration Parameters 292

        Device Mobility Dynamic Configuration by Location-Dependent Device Pools 294

    Device Mobility Configuration Elements 295

        Relationship Between Device Mobility Configuration Elements 295

    Device Mobility Operation 297

        Device Mobility Operation Flowchart 298

        Device Mobility Considerations 300

        Review of Line and Device CSSs 301

        Device Mobility and CSSs 302

        Examples of Different Call-Routing Paths Based on Device Mobility Groups and Tail-End Hop-Off 302

    Device Mobility Interaction with Globalized Call Routing 304

        Advantages of Using Local Route Groups and Globalized Call Routing 305

        Example of No Globalized Call Routing with a Different Device Mobility Group 306

        Example of No Globalized Call Routing with the Same Device Mobility Group 307

        Globalized Call Routing Example 308

    Device Mobility Configuration 309

        Steps 1 and 2: Configure Physical Locations and Device Mobility Groups 309

        Step 3: Configure Device Pools 310

        Step 4: Configure Device Mobility Infos 311

        Step 5a: Set the Device Mobility Mode CCM Service Parameter 312

        Step 5b: Set the Device Mobility Mode for Individual Phones 313

    Summary 314

    References 314

    Review Questions 315

Chapter 11 Implementing Extension Mobility 317

    Issues with Users Roaming Between Sites 317

        Issues with Roaming Users 318

        Extension Mobility Solves Issues of Roaming Users 319

    CUCM Extension Mobility Overview 319

        Extension Mobility: Dynamic Phone Configuration Parameters 320

        Extension Mobility with Dynamic Phone Configuration by Device Profiles 320

    CUCM Extension Mobility Configuration Elements 321

        Relationship Between Extension Mobility Configuration Elements 323

    CUCM Extension Mobility Operation 323

        Issues in Environments with Different Phone Models 326

    Default Device Profile and Feature Safe 326

        How Cisco Extension Mobility Handles Phone Model Differences 327

        Cisco Extension Mobility and CSSs 328

        Alternatives for Mismatching Phone Models and CSS Implementations 329

    CUCM Extension Mobility Configuration 329

        Step 1: Activate the Cisco Extension Mobility Feature Service 330

        Step 2: Set Cisco Extension Mobility Service Parameters 330

        Step 3: Add the Cisco Extension Mobility Phone Service 331

        Step 4: Create Default Device Profiles 332

        Step 5a: Create Device Profiles 333

        Step 5b: Subscribe the Device Profile to the Extension Mobility Phone Service 334

        Step 6: Associate Users with Device Profiles 335

        Step 7a: Configure Phones for Cisco Extension Mobility 337

        Step 7b: Subscribe the Phone to the Extension Mobility Phone Service 337

    Summary 338

    References 339

    Review Questions 339

Chapter 12 Implementing Service Advertisement Framework (SAF) and Call Control Discovery (CCD) 343

    SAF and CCD Overview 344

        Dial Plan Scalability Issues in Large Networks 344

        Scalable Dial Plan Solution for Large Networks 345

        CCD Overview 345

    SAF Characteristics 346

    SAF Client Types 348

    SAF Message Components 349

    SAF Routing Characteristics 349

    SAF Neighbor Relationships 350

    SAF Client and SAF Forwarder Functions 351

    CCD Characteristics 351

    CCD Services in CUCM 353

        Processing Received Routes in CUCM 354

    CCD Operation 355

        CCD Propagation of HQ Routes 356

        CCD Propagation of BR Routes 356

        CCD Call from HQ to BR 357

        CCD with a Link Failure at BR 359

        CCD for Call from HQ to BR During Link Failure 360

    SAF and CCD Implementation 361

        External SAF Client Configuration Elements 362

        Internal SAF Client Configuration Elements 364

        SAF Forwarder Configuration Procedure 365

        External SAF Client Configuration Procedure 367

        Step 1: Configure SAF Security Profile 367

        Step 2: Configure SAF Forwarder 368

        Step 3: Configure SAF-Enabled SIP Trunk 369

        Step 4: Configure Hosted DN Group 370

        Step 5: Configure Hosted DN Pattern 370

        Step 6: Configure CCD Advertising Service 371

        Step 7: Configure CCD Requesting Service and Partition 372

        Step 8: Configure CCD Blocked Learned Patterns 373

        Step 9: Configure CCD Feature Parameters 374

        Internal SAF Client Configuration Procedure 376

        Step 1: Configure Trunk Profile 376

        Step 2: Configure Directory-Number Blocks 377

        Step 3: Configure Call-Control Profile 378

        Step 4: Configure Advertising Service 378

        Step 5: Configure Requesting Service 379

        Step 6: Configure VoIP Dial Peer 380

        CCD Considerations 381

        Monitoring Learned Routes from CUCM in RTMT 382

        Monitoring Learned Routes in CUCME 382

        CCD PSTN Backup CSS 383

        SRST Considerations 384

        CCD and Static Routing Integration Considerations 385

        Cisco IOS SAF Client Considerations When Using Globalized Call Routing 386

        Solution for PSTN Backup Advertised in E.164 Format Without Leading + 387

        TEHO Considerations 388

        Trunk Considerations When Using Globalized Call Routing 388

        CUCM Clusters and CCD Configuration Modes 389

        Other SAF and CCD Considerations 390

    Summary 390

    References 391

    Review Questions 391

Answers Appendix 395

TOC, 9781587142536, 7/12/2011