Cisco Voice Gateways and Gatekeepers

Cisco Voice Gateways and Gatekeepers

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Cisco Voice Gateways and Gatekeepers provides detailed solutions to real-world problems encountered when implementing a VoIP network. Each chapter presents an overview of a technology followed by a detailed scenario and associated solutions. Emphasis is placed on the accepted best practices and common issues encountered. It will initially serve readers as a reference for complex gateway and gatekeeper deployments and will also be a valuable study aid for the Cisco Certifified Voice Professional (CCVP) certification track. Cisco Voice Gateways and Gatekeepers is divided into five sections. Part one provides an introduction to the roles of both gateways and gatekeepers and includes advice on when to use each. Part two focuses on deploying gateways; working with MGCP, H.323, and SIP; connecting to the PSTN, PBXs, and the IP WAN; configuring basic and advanced dial peers; and implementing SRST. Part Three focuses on deploying and configuring gatekeepers. Part four discusses use of gateways and gatekeepers in a service provider environment. Part five addresses use of the Cisco Tool Command Language (TCL). This book is also recommended self-study training for the CCVP GWGK more

Product details

  • Hardback | 648 pages
  • 190.5 x 233.7 x 40.6mm | 1,202.03g
  • Pearson Education (US)
  • Cisco Press
  • Indianapolis, United States
  • English
  • New ed.
  • 158705258X
  • 9781587052583
  • 1,565,580

Back cover copy

Cisco Voice Gateways and Gatekeepers Understanding and configuring GW/GK in complex VoIP networks Denise Donohue, CCIE(R) No. 9566David Mallory, CCIE No. 1933Ken Salhoff, CCIE No. 4915 Deployments of voice over IP (VoIP) networks continue at a rapid pace. Voice gateways are an essential part of VoIP networks, handling the many tasks involved in translating between transmission formats and protocols and acting as the interface between an IP telephony network and the PSTN or PBX. Gatekeepers and IP-to-IP gateways help these networks scale. Gatekeepers provide call admission control, call routing, address resolution, and bandwidth management between H.323 endpoints including Cisco IOS(R) voice gateways and Cisco(R) Unified CallManager clusters. IP-to-IP gateways allow VoIP calls to traverse disparate IP networks. Cisco Voice Gateways and Gatekeepers provides detailed solutions to real-world problems encountered when implementing a VoIP network. This practical guide helps you understand Cisco gateways and gatekeepers and configure them properly. Gateway selection, design issues, feature configuration, and security and high-availability issues are all covered in depth. The abundant examples, screen shots, configuration snips, and case studies make this a truly practical and useful guide for anyone interested in the proper implementation of gateways and gatekeepers in a VoIP network. Emphasis is placed on the accepted best practices and common issues encountered in real-world deployments. Cisco Voice Gateways and Gatekeepers is divided into four parts. Part I provides an overview of an IP voice network. Part II is dedicated to voice gateways, including discussions of Media Gateway Control Protocol (MGCP); H.323; Session Initiation Protocol (SIP); voice circuit options; connecting to the PSTN, PBX, and IP WAN; dial plans; digit manipulation; route selection; class of restriction; Survivable Remote Site Telephony (SRST) and MGCP fallback; digital signal processor (DSP) resources; and Tool Command Languaue (Tcl) scripts and Voice XML (VXML). Part III addresses voice gatekeepers, including detailed deployment and configuration. Part IV is dedicated to IP-to-IP gateways. "With this book, the authors provide an in-depth look at the breadth of voice gateway features and capabilities, as well as providing voice gateway configuration guidance."-Christina Hattingh, Access Technology Group, Cisco Systems(R) Understand the pros and cons of MGCP, H.323, and SIP, how they implement call signaling and describe call flow, and how to configure each protocol Learn the various analog and digital voice circuit options used to connect a VoIP network to the PSTN Configure and troubleshoot PSTN, PBX, and IP WAN connections Build scalable dial plans and understand the different types of dial peers Understand the various ways gateways control called and calling phone numbers Examine call admission control (CAC) techniques Configure Class of Restrictions (CoR) for both inbound and outbound calls Deploy and troubleshoot SRST and MGCP fallback Evaluate DSP considerations and resources Support interactive voice response (IVR) and advanced call-handing applications using Tcl scripts and VXML Deploy and configure basic and advanced gatekeeper functions Configure and troubleshoot IP-to-IP gatewaysThis book is also recommended self-study training for the CCVP GWGK exam. This IP communications book is part of the Cisco Press(R) Networking Technology Series. IP communications titles from Cisco Press help networking professionals understand voice and IP telephony technologies, plan and design converged networks, and implement network solutions for increased productivity. Category: Cisco Press-IP CommunicationsCovers: VoIP gateways and gatekeepers $65.00 USA / $81.00 CANshow more

About David Mallory

Denise Donohue, CCIE No. 9566, is a design engineer with AT&T. She is responsible for designing and implementing data and VoIP networks for SBC and AT&T customers. Prior to that, she was a Cisco instructor and course director for Global Knowledge. Her CCIE is in Routing and Switching. David L. Mallory, CCIE No. 1933, is a technical education consultant with Cisco Systems, Inc. supporting Cisco voice certifications. Prior to this role, David was a systems engineer supporting several global enterprise customers. David has presented on voice gateways and gatekeepers at Networkers and has achieved four CCIE certifications: Routing and Switching, WAN Switching, Security, and Voice. Ken Salhoff,CCIE No. 4915, is a systems engineer with Cisco Systems, Inc. Ken has been specializing in voice technologies with Cisco for the past six years. In the systems engineering role, Ken has supported several global enterprise customers using Cisco voice technologies. Ken has achieved two CCIE certifications: Routing and Switching, and more

Table of contents

Foreword Introduction Part I Voice Gateways and Gatekeepers Chapter 1 Gateways and Gatekeepers The Role of Voice Gateways Types of Voice Gateways The Role of Voice Gatekeepers The Role of IP-to-IP Gateways Introduction to Voice Protocols Media Gateway Control Protocol H.323 Session Initiation Protocol Skinny Client Control Protocol Real-Time Transport Protocol Call Control Agents Cisco CallManager Cisco CallManager Express SIP Proxy Server Cisco Enterprise Gateway PBX with Toll Bypass Deployment Scenarios Single Site Deployment Multisite with Centralized Call Control Multisite Deployment with Distributed Call Control Case Study: Introduction Chapter Review Questions Part II Gateways Chapter 2 Media Gateway Control Protocol Introduction to MGCP Pros Cons MGCP Operation MGCP Messages Registering with CallManager Call Flow with MGCP Call Flow Between Analog Phones ISDN Connections with Backhaul MGCP Fallback Dial Plan Considerations Implementing MGCP Gateways Basic MGCP Gateway Configuration Configuring MGCP Fallback Assigning an MGCP Source IP Address Configuring MGCP PRI and BRI Backhaul Enabling Multicast Music on Hold Configuring Cisco CallManager Configuring CallManager Redundancy Configuring DTMF Relay Securing MGCP Gateways Troubleshooting Tools Case Study: Configuring an MGCP Gateway Review Questions Chapter 3 H.323 H.323 Specifications H.323 Network Components H.323 Gateways H.323 Gatekeepers H.323 Terminals Multipoint Control Units H.323 Proxy Servers Call Flow H.323 Fast Start H.323 Protocol Pros and Cons Pros Cons When to Use H.323 Dial Plan Considerations Implementing H.323 Gateways Voice Class Configuration Voice Service VoIP Configuration Toll Bypass Defining H.323 Gateways on CallManager Redundancy DTMF Relay Securing H.323 Gateways Troubleshooting Tools Case Study: Configuring an H.323 Gateway Review Questions Chapter 4 Session Initiation Protocol Description of SIP SIP Functional Components SIP Messages SIP Call Flow Call Flow Between Two SIP Gateways Call Flow Using a Proxy Server Call Flow Using Multiple Servers Call Flow Using Cisco CallManager 5.x SIP Pros and Cons Pros Cons When to Use SIP Dial Plan Considerations Implementing SIP Gateways SIP Dial Peer Configuration SIP UA Configuration SIP Voice Service Configuration Toll Bypass Registering with CallManager DTMF Relay Securing SIP Gateways Allowing H.323 to SIP Connections Troubleshooting Tools Case Study: Configuring SIP Between a Gateway and CallManager 5.x Review Questions Chapter 5 Circuit Options Circuit Signaling Analog Circuits FXS/FXO E&M Digital Circuits T1 E1 E1 R2 ISDN Echo Cancellation Review Questions Chapter 6 Connecting to the PSTN PSTN Circuit Selection Overview Supported Analog Connection Types Supported Digital Connection Types Analog Trunks Configuring FXO Connections Configuring DID Connections Configuring Centralized Automated Message Accounting Connections Caveats and Restrictions Digital Trunks Configuring E1/T1 Physical Layer Connections Configuring ISDN PRI Trunks Configuring E1 R2 Trunks Configuring T1 CAS Trunks Configuring ISDN BRI Trunks Case Study: Add an E1 R2 Connection to the Leeds Gateway Review Questions Chapter 7 Connecting to PBXs Analog Trunks Configuring FXO/FXS Connections Configuring E&M Trunks Digital Trunks Configuring E1/T1 Physical Layer Connections Configuring ISDN PRI Trunks Configuring E1 R2 or T1 CAS Trunks Configuring Transparent Common Channel Signaling Case Study: Implementing a Cisco Voice Gateway at the Shanghai Office Review Questions Chapter 8 Connecting to an IP WAN Applications for Connecting to an IP WAN Design Considerations Quality of Service Using Class Maps to Classify Traffic Using Policy Maps Mapping to MPLS Classes Link Fragmentation and Interleave Compression AutoQos Providing Fax and Modem Services Providing Fax Services Providing Modem Services Security Securing Voice Media and Signaling V3PN NAT and VoIP Firewalls and VoIP Case Study: Using a T1 Link as a Tie Line Review Questions Chapter 9 Dial Plans Numbering Plans Private Numbering Plans PSTN Numbering Plans Overlapping Numbering Plans Building a Scalable Dial Plan Dial Peers Inbound Versus Outbound Dial Peers Dial Peer Matching Inbound Dial Peer Matching Outbound Dial Peer Matching Verifying Dial Peers Outbound Dial Peer Targets POTS Versus VoIP Outbound Dial Peers Dial Peer Operational Status Dial Peers Versus Cisco CallManager Case Study: Configuring PSTN Access Review Questions Chapter 10 Digit Manipulation Basic Digit Manipulation Digit Stripping Forward Digits Prefix Digits Number Expansion Voice Translation Rules and Profiles Creating Voice Translation Rules Building Regular Expressions Creating Voice Translation Profiles Applying Voice Translation Profiles Blocking Calls Using Voice Translation Rules and Profiles Testing Voice Translation Rules Manipulating Caller ID CLID Commands Station ID Commands Order of Operation in Digit Manipulation Troubleshooting Digit Manipulation Case Study Review Questions Chapter 11 Influencing Path Selection Hunt Groups Using the preference Command Using the huntstop Command Using Digit Manipulation Using Trunk Groups Tail-End Hop-Off Call Admission Control Local CAC Mechanisms Measurement-Based CAC Mechanisms Resource-Based CAC Mechanisms Resource Reservation Protocol POTS-to-POTS Call Routing Considerations Case Study: Implementing Gateway-Controlled RSVP Review Questions Chapter 12 Configuring Class of Restrictions COR Overview COR Operation Implementing COR Assigning COR Lists with SRST Assigning COR Lists with Cisco CallManager Express Assigning COR Lists to SIP Phones with CallManager Express Restricting Inbound Calls Case Study: Implementing COR for Miami Review Questions Chapter 13 SRST and MGCP Gateway Fallback SRST Overview Fallback Time Restoral Time Configuring SRST Gateway Configuration CallManager Configuration Dial Plan Considerations Planning Configuring SRST Dial Plan Patterns SRST Features Auto Attendant Maximum Line Appearances Conferencing Transferring Calls Forwarding Calls Voice-Mail Integration Music on Hold SIP SRST Configuring SIP Registrar Server Configuring a Voice Register Pool Call Preservation Secure SRST Configuring Secure SRST MGCP Gateway Fallback Configuring MGCP Gateway Fallback Verifying and Troubleshooting SRST Verifying and Troubleshooting MGCP Gateway Fallback Case Study: Integrating SRST with an Analog Voice-Mail System Review Questions Chapter 14 DSP Resources Need for DSP Resources Determining the DSP Resources Required DSP Types Voice Termination DSP Sharing Transcoding and MTP Resources Conference Bridge Resources Configuring DSP Resources Configuring Transcoding and Conferencing (C549) Configuring Enhanced Transcoding and Conferencing (C5510) Transcoding for CallManager Express Case Study: Add DSP Resources to the Miami Gateway Review Questions Chapter 15 Using Tcl Scripts and VoiceXML Tcl IVR and VoiceXML Application Overview Programming Resources Sample Applications Auto Attendant Basic ACD Fax Detect T.37 Store and Forward Fax Malicious Call ID Cisco Voice Portal Embedded Event Manager Downloading Tcl Scripts from Configuring the Gateway to Use a Tcl Script Initializing Tcl Scripts and Specifying Parameters Applying TclScripts Tcl Packages and Parameter Namespaces Tcl Parameters in Cisco IOS Release 12.3(14)T and Above Implementing the AA Tcl Script Creating Audio Files Restrictions and Caveats Case Study: Implementing ACD Application Review Questions Part III Gatekeepers Chapter 16 Deploying Gatekeepers Gatekeeper Functionality Gatekeeper Signaling RAS Signaling Gatekeeper Update Protocol Gatekeeper Transaction Message Protocol E.164 Number Resolution Zone Prefixes Technology Prefixes Gatekeeper Call Routing Process Call Admission Control Gatekeeper Deployment Models Redundancy Resource Availability Indicator Directory Gatekeeper Gatekeepers with CallManager Security with Gatekeepers Tokenless Call Authentication Review Questions Chapter 17 Gatekeeper Configuration Configuring Basic Gatekeeper Functionality Configuring Gatekeeper Zones Configuring Gateways to Use H.323 Gatekeepers Technology Prefixes Configuring Zone Prefixes and Dial Peers Dynamic Prefix Registration Configuring Call Admission Control Multiple Gatekeeper Configurations Configuring Directory Gatekeepers Troubleshooting Gatekeepers Registration Issues Call Routing Issues CallManager and Gatekeepers Configuring a CallManager Gatekeeper Trunk Gatekeeper Redundancy Hot Standby Routing Protocol Gatekeeper Clustering Load Balancing Troubleshooting Gatekeeper Clustering Configuring Resource Availability Indicator Configuring Gatekeeper Security Troubleshooting Gatekeeper Security Case Study: Deploying Gatekeepers to Assist in Migration to VoIP Review Questions Part IV IP-to-IP Gateways Chapter 18 Cisco Multiservice IP-to-IP Gateway IP-to-IP Gateway Overview Cisco Multiservice IP-to-IP Gateway Architecture Media-Handling Modes Protocol Support Basic Configuration Via-Zones IP-to-IP Gateway Features Video Support Address Hiding Security DTMF Interworking Fax Support Quality of Service Call Admission Control Transcoding VXML and Tcl Scripts Billing show Commands debug Commands Case Study: Providing Enterprise VoIP Trunking to VoIP Service of the Service Provider CallManager Configuration Review Questions Appendix A Answers to Chapter-Ending Review Questions 158705258x TOC 7/27/2006show more

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