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Cisco Systems OL-14619-01 manual Cisco Unity Failover and Standby Redundancy, C H A P T E R

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Cisco Unity Failover and Standby Redundancy

C H A P T E R 7

Cisco Unity Failover and Standby Redundancy

See the following sections:

•Comparison of Cisco Unity Failover and Standby Redundancy, page 7-1

•Failover, page 7-1

•Standby Redundancy, page 7-2

Comparison of Cisco Unity Failover and Standby Redundancy

Cisco Unity failover provides system-malfunction failover within a data center. Failover consists of two servers, a primary and a secondary. In general, the primary server is active and taking calls, while the secondary is inactive and not taking calls. Any changes to subscriber or configuration data on the primary server are automatically replicated to the secondary server. If the primary server stops functioning for some reason, the secondary server automatically becomes the active server and starts taking calls. The primary server temporarily becomes inactive.

Cisco Unity standby redundancy provides disaster-recovery failover across geographic locations. There are still two servers, a primary and a secondary, but they are installed in separate data centers, commonly in separate cities. If the data center in which the primary server is installed is affected by a natural disaster or other catastrophe, someone in (or with remote access to) the disaster-recovery facility manually activates the secondary server, and the secondary server begins taking calls.

For more information on how failover and standby redundancy work, see the “About Cisco Unity Failover” chapter in the applicable Failover Configuration and Administration Guide for Cisco Unity at http://www.cisco.com/en/US/products/sw/voicesw/ps2237/products_feature_guides_list.html.

Failover

For a list of the requirements for a failover system, see the “Requirements for Cisco Unity Failover” section in the System Requirements for Cisco Unity Release 5.0 at http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_installation_guides_list.html.

Design Guide for Cisco Unity Release 5.x

	OL-14619-01	7-1

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Cisco Systems OL-14619-01 manual Cisco Unity Failover and Standby Redundancy, Failover, page Standby Redundancy, page

Contents

Design Guide for Cisco Unity Americas HeadquartersRelease Revised May 6 Cisco Systems, Inc 170 West Tasman Drive San Jose, CA2008 Cisco Systems, Inc. All rights reserved Design Guide for Cisco Unity ReleaseNetwork Connection Optional for Some Configurations One or More Message-Store Servers Optional for Some ConfigurationsC O N T E N T S PrefaceWorkstations Audio CodecsVoice Messaging with Customer-Provided Infrastructure Domino Address Book TerminologyDeployment Tasks for Unified Messaging Configurations AuthenticationGeneral Integration Issues Voice Messaging ConfigurationOptional Integration Features Setup and ConfigurationMessaging Ports SCCP Integrations Only Alternate MWIsDiagram of a Standby Redundancy Configuration ConfigurationVoice-Recognition Access to Cisco Unity Migrating to Cisco Unity from Another Voice-Messaging Systemviii Contents Design Guide for Cisco Unity ReleaseOL-14619-01 Audience PrefaceDocument Conventions Audience, page Document Conventions, pageSupport Policy for Optional Third-Party Software Cisco Product Security Overview Obtaining Documentation, Obtaining Support, and Security GuidelinesOL-14619-01 Preface Design Guide for Cisco Unity ReleaseDesign Guide Overview Design or Feature DocumentationC H A P T E R Product Areahttp//ciscounitytools.com/AppIPFaxConfigurationWizard.htm Chapter 8, “Voice-Recognition Access to Cisco Unity”Domino, see http//ciscounitytools.com/AppThirdPartyFaxConfig.htm ondesignguideslist.htmlOL-14619-01 Chapter 1 Design Guide Overview Design Guide for Cisco Unity ReleaseOL-14619-01 Chapter 1 Design Guide Overview Design Guide for Cisco Unity ReleaseCisco Unity Concepts Where Cisco Unity Stores Data, pageHow Cisco Unity Works How Cisco Unity Works, pageCharacteristics of Unified Messaging and Voice Messaging Systems Unified MessagingVoice Messaging Network Connection Optional for Some Configurations, page Hardware Components of a Cisco Unity SystemOne or More Cisco Unity Servers, page One or More Cisco Unity Servers One or More Message-Store Servers Optional for Some Configurations Network Connection Optional for Some ConfigurationsSome Configuration Settings Are Stored in the Registry, page Where Cisco Unity Stores DataSoftware Components of a Cisco Unity System Voice Messages Are Stored in Domino or ExchangeExchange All Subscriber Information Is Stored in a SQL Server 2000 DatabaseEnabling Cisco Unity Servers to Communicate with One Another Networking Guide for Cisco Unity at Some Configuration Settings Are Stored in the Registry Using Firewalls with Cisco Unity, page Name ResolutionNetwork Infrastructure Requirements Availability of Network ResourcesAvailability of Message Store Servers Domain Controller Access and AvailabilitySizing and Scaling Cisco Unity Servers Using Firewalls with Cisco UnityMaximum Number of Users on Dedicated Domino or Exchange Servers, page Storage Capacity for Voice Messages, page Number of Voice Ports, pageStorage Capacity for Voice Messages Number of Voice PortsMaximum Number of Users on Dedicated Domino or Exchange Servers How Codecs Affect the File Size of Voice Messages Audio CodecsInteroperability Among Multiple Voice-Messaging Systems TTS, TTY, Pocket PCs, and Hand-Held ComputersAudio Codec Quality RatingDesigning a Cisco Unity System with Exchange as the Message Store Physical Placement and Network Infrastructure, pageDeployment Models Deployment Models, pageVoice Messaging with Cisco-Provided, Dedicated Infrastructure Unified Messaging with Customer-Provided InfrastructureMulti-Site WAN with Distributed Messaging Voice Messaging with Customer-Provided InfrastructurePhysical Placement and Network Infrastructure Active Directory Considerations Considerations for Customer-Provided InfrastructureActive Directory Considerations, page Exchange Considerations All Versions, pageActive Directory Application Mode ADAM is not supported Exchange Considerations All Versions Exchange Considerations That Apply Only Exchange Considerations for Cisco-Provided, Dedicated Infrastructure Considerations for Cisco-Provided, Dedicated InfrastructureDesign Guide for Cisco Unity Release OL-14619-01Considerations for Cisco-Provided, Dedicated Infrastructure 4-10Design Guide for Cisco Unity Release OL-14619-01Voice Messaging Configuration, page Unified Messaging Configurations, pageCriteria for a Supported Configuration, page Windows Domains and Domino Domains, page Server Placement, pageMaximum Number of Cisco Unity Subscribers Client Access Licenses, page Backing Up and Restoring Data, pageDomino Address Book Terminology Domino Clusters, page Message Routing, pageChanges That csAdmin Makes to the Domino Address Book ElementName Changes That csClient Makes to the Mail File Address Book Server, Message Store Server, and Mail Drop ServerElement NameServer Placement Windows Domains and Domino DomainsRevised May 6 Active Directory Accounts and Permissions AuthenticationDomino Permissions Cisco Unity Subscribers and Domino UsersDomino Clusters Cisco Unity and the Domino Address Book Client Access LicensesMessage Routing Notes Client on the Cisco Unity ServerUnified Messaging, No Domino Cluster Unified Messaging ConfigurationsServers Requirements and RecommendationsCriteria for a Supported Configuration Voice Messaging ConfigurationUnified Messaging, Domino Cluster gnguideslist.htmlEstablishing Support Policies, page Network Services, page Administrative Access and Control, pageDeployment Tasks for Unified Messaging Configurations, page Deploying Cisco Unity for Lotus DominoNetwork Services Administrative Access and ControlDeployment Tasks for Unified Messaging Configurations Establishing Support Policies5-13 Operational TasksCisco Unity 5.0 for Domino does not support Cisco Unity reports 5-14Integrating by Using SIP, page General Integration Issues, pageOptional Integration Features, page Centralized Voice Messaging, page Integrating Cisco Unity with the Phone Systemguideslist.html How an Integration WorksLines and Cables to Make Physical Connections Integration with Cisco Unified Communications ManagerDigital Integration with Digital PIMG Units DTMF Integration with Analog PIMG Units TIMG Integration Serial SMDI, MCI, or MD-110 Integration with Analog PIMG UnitsSerial Integration with Voice Cards DTMF Integration with Voice CardsConnections for an Integration by Using TIMG Units Figure 6-6 Connections for a DTMF Integration by Using Voice CardsCall Information Exchanged by the Phone System and Cisco Unity Settings in the Phone System and in Cisco UnityCall Control Sample Path for a Call from the Phone System to a SubscriberGeneral Integration Issues SCCP Feature6-10 Differences Between SCCP and SIP Integration Methods6-11 Option Considerations6-12 Cisco Unified Communications Manager Security Features, page Cisco Unified Communications Manager Security FeaturesWhen Data Is Encrypted, page Multiple Integrations Can Have Different Security Mode Settings, pageDescription 6-14Setting When Data Is EncryptedEffect 6-15Settings for Individual Voice Messaging Ports Multiple Integrations Can Have Different Security Mode SettingsDisabling and Re-Enabling Security 6-166-17 Packetization SCCP Integrations Only6-18 Multiple Cisco Unified Communications Manager Express Version SupportFeature SCCPMultiple Cisco Unified Communications Manager Express Routers Integrating with a Single Cisco Unity Server 6-20 Figure 6-11 Cisco Unified Communications Manager Fallback with PSTNCall forward to busy greeting 6-21 Impact of Non-Delivery of RDNIS on Voice Mail Calls Routed via AARCall transfers Message waiting indication6-22 Integrating by Using SIPCisco Unity Failover with SIP Trunks Supported SIP IntegrationsSIP Compliance 6-23Description of PIMG Integrations 6-24Digital Integration with Digital PIMG Units The phone system sends call information, MWI requests, and voice connections through the analog lines, which connect the phone system to the PIMG units. The PIMG units communicate with the Cisco Unity server through the LAN or WAN by using Session Initiation Protocol SIP. Figure 6-13 shows the connections for a DTMF integration by using analog PIMG units 6-25DTMF Integration with Analog PIMG Units Serial SMDI, MCI, or MD-110 Integration with Analog PIMG Units6-26 Description of TIMG IntegrationsFirmware Updates Setup and ConfigurationSerial Integrations 6-27Increasing Port Capacity Cisco Unity Failover6-28 Cisco Unity Failback Multiple Integration Support/Branch Office Consolidation6-29 6-30 Integrating with Multiple Phone SystemsCall Control QOS Byte RTP QOS ByteRequirements for Integrations with Multiple Phone Systems Using SCCP Phone Systems with Other IntegrationsNotes for PIMG Integrations 6-31Alternate Extensions Optional Integration FeaturesReasons to Use Alternate Extensions How Alternate Extensions WorkAlternate MWIs Setting Up Alternate MWIs for Extensions on the Same Phone SystemMWIs for Extensions on a Non-Integrated Phone System 6-336-34 Centralized Voice MessagingMessage waiting indication MWI 6-35Chapter 6 Integrating Cisco Unity with the Phone System 6-36Centralized Voice Messaging Design Guide for Cisco Unity ReleaseFailover Cisco Unity Failover and Standby RedundancyComparison of Cisco Unity Failover and Standby Redundancy Comparison of Cisco Unity Failover and Standby Redundancy, pageStandby Redundancy Page The names of both Cisco Unity servers must be 14 characters or shorter Figure 7-1 Cisco Unity Standby Redundancy Example Diagram Diagram of a Standby Redundancy ConfigurationData Center primaryChapter 7 Cisco Unity Failover and Standby Redundancy Standby Redundancy Design Guide for Cisco Unity ReleaseOL-14619-01 C H A P T E R Voice-Recognition Access to Cisco UnityChapter 8 Voice-Recognition Access to Cisco Unity Design Guide for Cisco Unity ReleaseOL-14619-01 C H A P T E R Migrating to Cisco Unity from Another Voice-Messaging SystemThe supporting infrastructure for example, message store servers, whether dedicated to IN-1 I N D EIN-2 Index IN-3Design Guide for Cisco Unity Release OL-14619-01IN-4 Index Design Guide for Cisco Unity ReleaseOL-14619-01