The complete guide to deploying and operating SBC solutions, Including Cisco Unified Border Element (CUBE) Enterprise and service provider networks are increasingly adopting SIP as the guiding protocol for session management, and require leveraging Session Border Controller (SBC) technology to enable this transition. Thousands of organizations have made the Cisco Unified Border Element (CUBE) their SBC technology of choice. Understanding Session Border Controllers gives network professionals and consultants a comprehensive guide to SBC theory, design, deployment, operation, security, troubleshooting, and more. Using CUBE-based examples, the authors offer insights that will be valuable to technical professionals using any SBC solution. The authors thoroughly cover native call control protocols, SBC behavior, and SBC’s benefits for topology abstraction, demarcation and security, media, and protocol interworking. They also present practical techniques and configurations for achieving interoperability with a wide variety of collaboration products and solutions. Evaluate key benefits of SBC solutions for security, management, and interoperability Master core concepts of SIP, H.323, DTMF, signaling interoperability, call routing, fax/modem over IP, security, media handling, and media/signal forking in the SBC context Compare SBC deployment scenarios, and optimize deployment for your environment Size and scale an SBC platform for your environment, prevent oversubscription of finite resources, and control cost through careful licensing Use SBCs as a back-to-back user agent (B2BUA) to interoperate between asymmetric VoIP networks Establish SIP trunking for PSTN access via SBCs Interoperate with call servers, proxies, fax servers, ITSPs, redirect servers, call recording servers, contact centers, and other devices Secure real-time communications over IP Mitigate security threats associated with complex SIP deployments Efficiently monitor and manage an SBC environment

Table of Contents:
    Foreword xxx     Introduction xxxiii Part I Introduction Chapter 1 Laying the Groundwork 1     Overview of SIP 3     Overview of H.323 18     Introduction to SIP Trunking 20     Introduction to SDP 26     Overview of B2BUAs 42     Session Border Controllers 44     Cisco Unified Border Element 53     Summary 54     References 54 Chapter 2 SBC Deployment Models 55     Purposeful Deployments 56     CUBE Deployment Options 61     Multi-VRF Support on CUBE 68     SBC High Availability 72     Summary 108     References 109 Part II Architecture, Capabilities and Design Chapter 3 Call Routing 111     Dialing and Routing a SIP Call 112     Call Routing Types 128     Next-Hop Determination 132     End-to-End Call Trace 141     CUBE Call Routing Mechanisms 149     Summary 221     References 222 Chapter 4 Signaling and Interworking 225     SIP—SIP Interworking 226     SIP Header Interworking 281     SIP Normalization 283     Transport and Protocol Interworking 299     Supplementary Services 312     SIP—H.323 Interworking 319     Summary 323     References 323 Chapter 5 Media Processing 327     Real-Time Transport Protocol 328     Real-Time Transport Control Protocol 334     SBC Handling of RTP and RTCP 341     Symmetric and Asymmetric RTP/RTCP 354     DSP-Based RTP Handling on SBCs 356     Media Anti-Tromboning 374     Alternative Network Address Types 378     Solving NAT Traversal Challenges 380     Troubleshooting RTP 404     Summary 413     References 413 Chapter 6 Secure Signaling and Media 415     Understanding Secure Technologies 415     Establishing Secure Sessions 449     SBC Signaling and Media Security 474     Alternative Security Methods 504     Summary 504     References 505 Chapter 7 DTMF Interworking 509     Introduction to DTMF Relay 510     Variants of DTMF Relay 512     DTMF Relay on SBCs 530     Configuring and Troubleshooting DTMF Relay 546     Summary 568     References 568 Chapter 8 Scalability Considerations 571     Platform Sizing 572     Licensing 598     Overload Prevention Techniques 610     Summary 625     References 626 Part III Integrations and Interoperability Chapter 9 SIP Trunking for PSTN Access Through SBCs 627     Best Practices for ITSP Access with SBCs 628     SIP Trunk Registration 635     Authentication 642     Registration with SBCs 648     Troubleshooting 671     Summary 677     References 677 Chapter 10 Fax over IP (FoIP) on SBCs 679     Introduction to Fax 680     Analyzing a Basic Fax Call 683     Fax over IP (FoIP) 699     SBC Handling of FoIP 721     FoIP on CUBE 723     Summary 750     References 750 Chapter 11 Network-Based Call Recording 751     The Business Need for Call Recording 752     IETF SIP Recording Architecture (SIPREC) 753     SIPREC Configuration 763     SIPREC Troubleshooting 775     Cisco UC Gateway Services Architecture 789     The XCC and XMF Data Model 792     API-Based Recording 797     API-Based Recording Configuration 811     API-Based Recording Troubleshooting 823     Summary 836     References 836 Chapter 12 Contact Center Integration 839     Cisco UCCE Architecture 840     Inbound Calls to Agents 847     Call Transfers 885     Courtesy Callback 902     Call Progress Analysis (CPA) 914     Troubleshooting Scenarios 931     Summary 953     References 953 Part IV Security and Operations Chapter 13 Security Threat Mitigation 955     An Overview of Security Threats to Collaboration Solutions 956     Types of Security Threats 959     Other SBC Security Features 998     Designing Collaboration Networks for Security 1009     Summary 1018     References 1018 Chapter 14 Monitoring and Management 1021     Monitoring 1021     Management 1050     Summary 1069     References 1070 Appendix A Q.850 Release Cause Values 1073 9781587144769, TOC, 11/7/2018