Cisco Unified Survivable Remote Site Telephony Version 4.0 .

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Cisco Unified Survivable Remote Site TelephonyVersion 4.0 System Administrator GuideFebruary 2006Corporate HeadquartersCisco Systems, Inc.170 West Tasman DriveSan Jose, CA 95134-1706USAhttp://www.cisco.comTel: 408 526-4000800 553-NETS (6387)Fax: 408 526-4100

THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALLSTATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUTWARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS.THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THATSHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSEOR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY.The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB’s publicdomain version of the UNIX operating system. All rights reserved. Copyright 1981, Regents of the University of California.NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED “AS IS” WITHALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUTLIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OFDEALING, USAGE, OR TRADE PRACTICE.IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING,WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCOOR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.CCSP, CCVP, the Cisco Square Bridge logo, Follow Me Browsing, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, andiQuick Study are service marks of Cisco Systems, Inc.; and Access Registrar, Aironet, BPX, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, Cisco, the Cisco CertifiedInternetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity, Enterprise/Solver, EtherChannel, EtherFast,EtherSwitch, Fast Step, FormShare, GigaDrive, GigaStack, HomeLink, Internet Quotient, IOS, IP/TV, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, LightStream,Linksys, MeetingPlace, MGX, the Networkers logo, Networking Academy, Network Registrar, Packet, PIX, Post-Routing, Pre-Routing, ProConnect, RateMUX, ScriptShare,SlideCast, SMARTnet, The Fastest Way to Increase Your Internet Quotient, and TransPath are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United Statesand certain other countries.All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationshipbetween Cisco and any other company. (0601R)Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in thedocument are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator GuideCopyright 2006 Cisco Systems, Inc. All rights reserved.

C O N T E N T SCisco Unified Survivable Remote Site Telephony Feature RoadmapContents11Documentation Organization1Feature Roadmap 3Information About New Features in Cisco Unified SRST V4.0 7Information About New Features in Cisco SRST V3.4 9Information About New Features in Cisco SRST V3.3 9Information About New Features in Cisco SRST V3.2 10Information About New Features in Cisco SRST V3.1 13Information About New Features in Cisco SRST V3.0 13Information About Features That Were New in Cisco SRST V2.1 18Information About Features That Were New in Cisco SRST V2.02 20Overview of Cisco Unified SRSTContents2323Cisco Unified SRST Description 23H.323 Gateways and SRST 26MGCP Gateways and SRST 26Support for Cisco Unified IP Phones, Platforms, Cisco Unified CallManager, Signals, Languages, andSwitches 27Finding Cisco IOS Software Releases That Support Cisco Unified SRST 27Cisco Unified IP Phone Support 28Platform and Memory Support 29Cisco Unified CallManager Compatibility 29Signal Support 29Language Support 30Switch Support 30Prerequisites for Configuring Cisco Unified SRST 31Installing Cisco Unified CallManager 31Installing Cisco Unified SRST 31Integrating Cisco Unified SRST with Cisco Unified CallManagerRestrictions for Configuring Cisco Unified SRSTWhere to Go Next323335Additional References35Cisco IOS Survivable Remote Site Telephony Version 4.0 System Administrator Guideiii

ContentsRelated Documents 35Standards 37MIBs 37RFCs 37Technical Assistance 37Setting Up the NetworkContents3939Information About Setting Up the Network39How to Set Up the Network 40Enabling IP Routing 40Enabling SRST on an MGCP Gateway 40Configuring DHCP for Cisco Unified SRST Phones 42Specifying Keepalive Intervals 45Configuring Cisco Unified SRST to Support Phone FunctionsVerifying That Cisco Unified SRST Is Enabled 48Where to Go Next49Setting Up Cisco Unified IP PhonesContents465151Information About Setting Up Cisco Unified IP Phones51How to Set Up Cisco Unified IP Phones 52Configuring IP Phone Clock, Date, and Time Formats 52Configuring IP Phone Language Display 53Configuring Customized System Messages for Cisco Unified IP PhonesConfiguring a Secondary Dial Tone 57Configuring Dual-Line Phones 58How to Set Up Cisco IP Communicator for Cisco Unified SRSTVerifying Cisco IP Communicator 61Troubleshooting Cisco IP Communicator 61Where to Go Next61Setting Up Call HandlingContents6363Information About Setting Up Call Handling63How to Set Up Call Handling for Incoming and Outgoing CallsConfiguring Incoming Calls 64Configuring Outgoing Calls 81Cisco IOS Survivable Remote Site Telephony Version 4.0 System Administrator Guideiv606355

ContentsH.323 VoIP Call Preservation Enhancements for WAN Link FailuresWhere to Go Next97Configuring Additional Call FeaturesContents979999Information About Configuring Additional Call Features99How to Configure Additional Call Features 99Enabling Three-Party G.711 Ad Hoc Conferencing 100Configuring MOH for G.711 VoIP and PSTN Calls 101Configuring MOH from Flash Files 102Defining XML API Schema 102Where to Go Next103Setting Up Secure Survivable Remote Site TelephonyContents105105Prerequisites for Setting Up Secure SRSTRestrictions for Setting Up Secure SRST105106Information About Setting Up Secure SRST 107Benefits of Secure SRST 107Cisco IP Phones Clear-Text Fallback During SRST 108SRST Routers and the TLS Protocol 108SRST Routers and PKI 109Secure SRST Authentication and Encryption 110Cisco IOS Credentials Server on Secure SRST Routers 111Establishment of Secure SRST to the Cisco Unified IP Phone111How to Configure Secure SRST 113Preparing the SRST Router for Secure Communication 113Importing Phone Certificate Files in PEM Format to the Secure SRST RouterConfiguring Cisco Unified CallManager to the Secure SRST Router 129Enabling SRST Mode on the Secure SRST Router 132Verifying Phone Status and Registrations 134122Configuration Examples for Secure SRST 138Secure SRST: Example 138Control Plane Policing: Example 143Where to Go Next144Additional References 144Related Documents 144Standards 145MIBs 145Cisco IOS Survivable Remote Site Telephony Version 4.0 System Administrator Guidev

ContentsRFCs 145Technical Assistance145Integrating Voice Mail with Cisco Unified SRSTContents147147Information About Integrating Voice Mail with Cisco Unified SRST147How to Integrate Voice Mail with Cisco Unified SRST 149Configuring Direct Access to Voice Mail 149Configuring Message Buttons 152Redirecting to Cisco Unified CallManager Gateway 154Configuring Call Forwarding to Voice Mail 154Configuring Message Waiting Indication 159Configuration Examples 161Configuring Local Voice-Mail System (FXO and FXS): Example 161Configuring Central Location Voice-Mail System (FXO and FXS): ExampleConfiguring Voice-Mail Access over FXO and FXS: Example 162Configuring Voice-Mail Access over BRI and PRI: Example 163Where to Go Next163Setting Video ParametersContents165165Prerequisites for Setting Video ParametersRestrictions for Setting Video Parameters165166Information About Setting Video Parameters 166Matching Endpoint Capabilities 167Retrieving Video Codec Information 167Call Fallback to Audio-Only 167Call Setup for Video Endpoints 167Flow of the RTP Video Stream 168How to Set Video Parameters for Cisco Unified SRST 169Configuring Slow Connect Procedures 169Verifying Cisco Unified SRST 170Setting Video Parameters for Cisco Unified SRST 177Troubleshooting Video for Cisco Unified SRST178Cisco IOS Survivable Remote Site Telephony Version 4.0 System Administrator Guidevi162

ContentsMonitoring and Maintaining Cisco Unified SRST179Appendix A: Preparing Cisco Unified SRST Support for SIPContents181181DTMF Relay for SIP Applications and Voice MailDTMF Relay Using SIP RFC 2833 182DTMF Relay Using SIP Notify (Nonstandard)181183INDEXCisco IOS Survivable Remote Site Telephony Version 4.0 System Administrator Guidevii

ContentsCisco IOS Survivable Remote Site Telephony Version 4.0 System Administrator Guideviii

Cisco Unified Survivable Remote Site TelephonyFeature RoadmapThis chapter contains a list of Cisco Unified Survivable Remote Site Telephony (Cisco Unified SRST)features and the location of feature documentation.NotePrior to version 4.0, the name of this product was Cisco SRST.Use Cisco Feature Navigator to find information about platform support and Cisco IOS software imagesupport. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account onCisco.com. If you do not have an account or have forgotten your username or password, click Cancel atthe login dialog box and follow the instructions that appear.NoteThe Cisco IOS Voice Configuration Library includes a standard library preface, a glossary, and featureand troubleshooting documents and is located athttp://www.cisco.com/en/US/products/ps6441/prod configuration guide09186a0080565f8a.html.Contents Documentation Organization, page 1 Feature Roadmap, page 3Documentation OrganizationThis document consists of the following chapters or appendixes as shown in Table 1.Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide1

Cisco Unified Survivable Remote Site Telephony Feature RoadmapDocumentation OrganizationTable 1Cisco Unified SRST Configuration SequenceChapter or AppendixDescriptionOverview of Cisco Unified SRSTProvides a summary of SRST. This chapter includes the followingsections:Setting Up the NetworkSetting Up Cisco Unified IP PhonesSetting Up Call HandlingConfiguring Additional Call Features Cisco Unified SRST Description, page 23 Support for Cisco Unified IP Phones, Platforms, Cisco UnifiedCallManager, Signals, Languages, and Switches, page 27 Prerequisites for Configuring Cisco Unified SRST, page 31 Restrictions for Configuring Cisco Unified SRST, page 33 Additional References, page 35Describes how to set up a Cisco Unified SRST system tocommunicate with your network. This chapter includes thefollowing tasks: Enabling IP Routing, page 40 Configuring DHCP for Cisco Unified SRST Phones, page 42 Specifying Keepalive Intervals, page 45 Configuring Cisco Unified SRST to Support Phone Functions,page 46 Verifying That Cisco Unified SRST Is Enabled, page 48Describes how to set up the basic Cisco Unified SRST phoneconfiguration. This chapter includes the following tasks: Configuring IP Phone Clock, Date, and Time Formats, page 52 Configuring IP Phone Language Display, page 53 Configuring Customized System Messages for Cisco Unified IPPhones, page 55 Configuring a Secondary Dial Tone, page 57 Configuring Dual-Line Phones, page 58Describes how to configure incoming and outgoing calls. Thischapter includes the following tasks: Configuring Incoming Calls, page 64 Configuring Outgoing Calls, page 81Describes how to configure optional system and phone parameters.This chapter includes the following tasks: Enabling Three-Party G.711 Ad Hoc Conferencing, page 100 Configuring MOH for G.711 VoIP and PSTN Calls, page 101 Configuring MOH from Flash Files, page 102Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide2

Cisco Unified Survivable Remote Site Telephony Feature RoadmapFeature RoadmapTable 1Cisco Unified SRST Configuration Sequence (continued)Chapter or AppendixDescriptionSetting Up Secure Survivable Remote Site Telephony Describes the Media and Signaling Authentication and Encryptionfeature for Cisco IOS MGCP gateways in SRST mode. This chapterincludes the following tasks:Integrating Voice Mail with Cisco Unified SRST Preparing the SRST Router for Secure Communication,page 113 Importing Phone Certificate Files in PEM Format to the SecureSRST Router, page 122 Configuring Cisco Unified CallManager to the Secure SRSTRouter, page 129 Enabling SRST Mode on the Secure SRST Router, page 132 Verifying Phone Status and Registrations, page 134Describes how to set up voice mail. This chapter includes thefollowing tasks: Configuring Direct Access to Voice Mail, page 149 Configuring Message Buttons, page 152 Redirecting to Cisco Unified CallManager Gateway, page 154 Configuring Call Forwarding to Voice Mail, page 154Monitoring and Maintaining Cisco Unified SRSTProvides a list of useful show commands for monitoring andmaintaining SRST.Appendix A: Preparing Cisco Unified SRST Supportfor SIPDescribes special configurations to support SIP calls.Feature RoadmapTable 2 provides a feature history summary of Cisco Unified SRST features.Table 2Cisco Unified SRST Features by Cisco IOS ReleaseCisco Unified SRSTVersionCisco IOS ReleaseVersion 4.0Version 3.412.4(4)XC12.4(9)T12.4(4)TModifications Additional Cisco Unified IP Phone Support for the Cisco Unified IP Phone7911G, Cisco Unified IP Phone 7941G, Cisco Unified IP Phone 7941G-GE,Cisco UnifiedIP Phone 7961G, and Cisco UnifiedIP Phone 7961G-GE,page 8 Cisco IP Communicator Support, page 8 Fax passthrough using SCCP and ATAs Support, page 8 H.323 VoIP Call Preservation Enhancements for WAN Link Failures, page 8 Video Support, page 9 SIP SRST, Version 3.4, page 9Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide3

Cisco Unified Survivable Remote Site Telephony Feature RoadmapFeature RoadmapTable 2Cisco Unified SRST Features by Cisco IOS Release (continued)Cisco Unified SRSTVersionCisco IOS ReleaseVersion 3.3Version 3.2Version 3.1Version ifications Secure SRST, page 10. Cisco Unified IP Phone 7970G and Cisco Unified 7971G-GE Support,page 10 Enhancement to the show ephone Command, page 10 Enhancement to the alias Command, page 11 Enhancement to the pickup Command, page 11 Enhancement to the user-locale Command, page 11 Enhancement to the user-locale Command, page 11 Increased the Number of Cisco Unified IP Phones Supported on the Cisco3845, page 12 MOH Live-Feed Support, page 12 No Timeout for Call Preservation, page 12 RFC 2833 DTMF Relay Support, page 12 Translation Profile Support, page 12 Cisco Unified IP Phone 7920 Support, page 13 Cisco Unified IP he intended recipient. These securityfeatures allow privacy for SRST voice calls and protect against voice security violations and identitytheft. For more information see the chapter “Setting Up Secure Survivable Remote Site Telephony”section on page 105.Cisco Unified IP Phone 7970G and Cisco Unified 7971G-GE SupportThe Cisco Unified IP Phones 7970G and 7971G-GE are full-featured telephones that provide voicecommunication over an IP network. They function much like a traditional analog telephones, allowingyou to place and receive phone calls and to access features such as mute, hold, transfer, speed dial, callforward, and more. In addition, because the phones are connected to your data network, they offerenhanced IP telephony features, including access to network information and services, andcustomizeable features and services. The phones also support security features that include fileauthentication, device authentication, signaling encryption, and media encryption.The Cisco Unified IP Phones 7970G and 7971G-GE also provide a color touchscreen, support for up toeight line or speed-dial numbers, context-sensitive online help for buttons and feature, and a variety ofother sophisticated functions. No configurations specific to SRST are necessary.For more information, see the following t/voice/c ipphon/english/ipp7970/index.htmNoteThe Cisco Unified IP Phone 7914 Expansion Module can attach to your Cisco Unified IP Phones 7970Gand 7971G-GE. See Cisco Unified IP Phone Expansion Module 7914 Support, page 19 for moreinformation.Enhancement to the show ephone CommandThe show ephone command has been enhanced to display the configuration and status of theCisco Unified IP Phone 7970G and Cisco Unified IP Phone 7971G-GE. For more information, see theshow ephone command in the Cisco Unified Survivable Remote Site Telephony (SRST) CommandReference (All Versions).Information About New Features in Cisco SRST V3.2Cisco SRST V3.2 introduced the new features described in the following sections: Enhancement to the alias CommandCisco U

Configuring IP Phone Clock, Date, and Time Formats 52 Configuring IP Phone Language Display 53 Configuring Customized System Messages for Cisco Unified IP Phones 55 Configuring a Secondary Dial Tone 57 Configuring Dual-Line Phones 58 How to Set Up Cisco IP Communicator for Cisco Unified SR

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