Mediation Server
by Microsoft OCS Team, Stephanie Lindsey, Rick Kingslan, Mitch Tulloch, Kintan Brah
Microsoft® Office Communications Server 2007 Resource Kit
- Microsoft Office Communications Server 2007 Resource Kit
- Foreword
- Acknowledgments
- Introduction
- I. Overview and Architecture
- 1. Overview of Office Communications Server 2007
- The Evolution of Office Communications Server 2007
- Understanding the Enhanced Presence Model
- Overview of IM Conferencing Capabilities
- Overview of Web Conferencing Capabilities
- Overview of Audio/Video Conferencing Capabilities
- Overview of Enterprise Voice Capabilities
- Overview of Office Communications Server Clients
- Customizing the Platform
- Summary
- Additional Resources
- 2. Server Roles
- 3. Infrastructure and Security Considerations
- Understanding How Office Communications Server Leverages Active Directory
- Using DNS to Publish Office Communications Server
- Securing Office Communications Server with PKI
- Scaling with SQL Server
- Building Redundancy with Hardware Load Balancing
- Bridging VoIP to the PSTN Network by Using a Media Gateway
- Publishing Web Interfaces to the Internet by Using HTTPS Reverse Proxy
- Summary
- Additional Resources
- 1. Overview of Office Communications Server 2007
- II. Key Usage Scenarios
- 4. Basic IM and Presence Scenarios
- Understanding the Login Process
- Understanding How Presence Information Is Shared
- What Is Presence?
- Overview of the Presence Sharing Scenario
- Examining the Technical Details Behind the Presence Sharing Scenario
- Examining What Happens During Looking Up a Contact (Step 1)
- Examining What Happens When Adding a Contact (Step 2)
- Examining What Happens When Subscribing for Presence and Receiving an Offline Notification (Step 3)
- Examining What Happens When the Contact Logs In and Updated Presence Is Received (Step 4)
- Examining What Happens When Controlling the Access Level of a Contact (Step 5)
- Understanding Instant Messaging
- Overview of the Instant Messaging Scenario
- Examining the Technical Details Behind the Instant Messaging Scenario
- Examining What Happens During Session Establishment and Sending a Message (Post Step 2)
- Examining What Happens When Receiving a Message (Step 3)
- Examining What Happens When Sending a Hyperlink (Step 4)
- Examining What Happens When Sending a File (Step 5)
- Examining What Happens When Sharing Video (Step 6)
- Examining What Happens When Ending the Conversation (Step 7)
- Summary
- Additional Resources
- 5. Conferencing Scenarios
- Overview of Conferencing Scenarios
- Examining the Technical Details Behind Conferencing Scenarios
- Understanding the Conferencing Architecture
- Understanding Conferencing Clients
- Understanding the Conferencing Database
- Understanding Focus
- Understanding the Focus Factory
- Understanding Conferencing Servers and the Conferencing Server Factory
- Understanding Web Components
- Understanding Process and Machine Boundaries for Conferencing Components
- Understanding Edge Servers
- Understanding the Conferencing Protocols
- Understanding the Conference Life Cycle
- Examining the Technical Details Behind Web Conferencing
- Understanding the Client Conference Joining Sequence
- Understanding the Client Join Sequence to the Web Conferencing Server
- Understanding Conference Control
- Understanding Web Conferencing Server Content Management
- Understanding Web Conferencing Server Content Upload and Download
- Understanding Meeting Compliance
- Understanding Web Conferencing Content Tools
- Understanding Meeting Policy and Policy Enforcement
- Understanding the Conferencing Architecture
- Summary
- Additional Resources
- 6. Remote Access Scenarios
- Understanding Basic Remote Access Topologies
- Understanding Basic Remote Access Scenarios
- Understanding Extended Remote Access Scenarios
- Summary
- Additional Resources
- 7. Federation Scenario
- Understanding Federation
- Understanding the Requirements for and Use of Certificates in Federation
- Comparing Consolidated Topology to Expanded Topology
- Understanding On-Premises Conferencing Rules for Federated and Nonfederated Users
- Configuring and Administering Federation
- Examining the Technical Details Behind the Federation Scenario
- Examining How Clients from Two Federated Domains Get Online and Register Presence
- Examining Communication from One Federated Enterprise to Another
- Step 1—SUBSCRIBE sip:[email protected] SIP/2.0
- Step 2—BENOTIFY and OK/200
- Step 8—INVITE sip:[email protected] SIP/2.0
- Step 12—INFO sip:[email protected];opaque=user:epid:rcCqh5A6AVmnmbRnI5LzvwAA;gruu SIP/2.0
- Step 13—MESSAGE sip:[email protected];opaque=user:epid:IAnGIHUus1qSUt8ED60SDgAA;gruu SIP/2.0
- Step 19—sip:[email protected];opaque=user:epid:IAnGIHUus1qSUt8ED60SDgAA;gruu SIP/2.0
- Summary
- Additional Resources
- 8. Public IM Connectivity Scenario
- Why Talk About the Public IM Connectivity Scenario?
- Overview of the Public IM Connectivity Scenario
- Considerations for Deploying the Public IM Connectivity Scenario
- Enabling Federation with Public IM Service Providers
- Considerations Involving Public IM Providers
- Considerations Involving Existing Accounts on Provider Networks
- Capacity Planning Considerations
- Security Considerations
- Considerations Involving Media Sharing
- Enabling Users for Public IM Connectivity
- Examining the Technical Details Behind the Public IM Connectivity Scenario
- Scenario One: Adding a Contact in Office Communicator 2007
- Step 1: Specify Recipient's Account
- Step 2: Recipient's Presence Displayed as Unknown
- Step 3: Recipient's Account Added as a Contact
- Step 4: Recipient's Presence Displayed as Offline
- Step 5: Recipient Receives Notification
- Step 6: Recipient Adds a User to Buddy List
- Step 7: Recipient's Presence Displayed as Online
- Scenario Two: Sending a Single Message
- Scenario One: Adding a Contact in Office Communicator 2007
- Summary
- Additional Resources
- 9. Understanding Remote Call Control Scenario
- 10. VoIP Scenarios
- What Is VoIP?
- Overview of VoIP Scenarios
- Examining the Technical Details Behind VoIP Scenarios
- Configuring VoIP
- Summary
- Additional Resources
- 4. Basic IM and Presence Scenarios
- III. Planning and Deployment
- 11. Office Communications Server 2007 Planning Example
- Understanding Contoso's Infrastructure
- Defining the Deployment Goals
- Understanding Contoso's Office Communications Server 2007 Planning Process
- Step 1: Determining Key Planning Decisions
- Step 2: Select Your Topology
- Step 3: Plan Your Deployment Path
- Step 4: Prepare Your Infrastructure
- Step 5: Review System and Network Requirements
- Step 6: Plan for External User Access
- Step 7: Plan for Deploying Load Balancers
- Step 8: Plan for VoIP
- Step 9: Plan for Address Book Server
- Step 10: Plan for High Availability and Fault Tolerance
- Step 11: Plan for Database Storage
- Step 12: Plan for Compliance and Usage Analysis
- Summary
- Additional Resources
- 12. Office Communications Server 2007 Deployment Example
- Understanding Contoso's Deployment Process for Office Communications Server 2007
- Establishing a Server Naming Convention
- Preparing the Server Hardware
- Contoso's Deployment Path
- Preparing Active Directory
- Overview of Preparing Firewall Ports, Certificates, NICs, and DNS
- Preparing DNS, Firewall Ports, and Certificates for Chicago Deployment
- Preparing DNS and Firewall Ports for the Paris Deployment
- Preparing DNS and Firewall Ports for the Madrid Deployment
- Preparing DNS and Firewall Ports for the Singapore Deployment
- Contoso's Deployment Path for Chicago
- Contoso's Deployment Path for Paris
- Contoso's Deployment Path for Madrid
- Contoso's Deployment Path for Singapore
- Final Contoso Architecture
- Summary
- Additional Resources
- Understanding Contoso's Deployment Process for Office Communications Server 2007
- 11. Office Communications Server 2007 Planning Example
- IV. Operations
- 13. Monitoring
- 14. Backup and Restore
- Planning for Backup and Restore
- Restoring Service
- Deciding How to Restore Service
- Verifying Restoration Prerequisites
- Setting Up Server Platforms
- Installing Restoration Tools
- Restoring Data
- Restoring Settings in Standard Edition Server Environments
- Restoring Settings in Enterprise Pool Configurations
- Re-creating Enterprise Pools
- Reassigning Users
- Restoring Domain Information
- Restoring Sites
- Step 1: Determine the Recovery Support to Be Provided by the Secondary Site
- Step 2: Create a Deployment Plan and Restoration Strategy for the Secondary Site
- Step 3: Set Up the Secondary Site
- Step 4: Prepare the Primary Site to Support Recovery at the Secondary Site
- Step 5: Maintain the Secondary Site
- Step 6: Validate Site Recovery Capabilities by Simulating an Outage
- Step 7: Bring the Secondary Site Online
- Step 8: Restore the Primary Site and Bring It Back Online
- Summary
- Additional Resources
- V. Technical Troubleshooting and Diagnostics
- 15. Administration
- Configuring Global Settings
- Configuring Pool Settings
- Configuring Server Settings
- Configuring Settings for All Servers
- Configuring Diagnostic Settings
- Configuring Settings for Standard Edition and Enterprise Edition Servers
- Configuring Application Server Settings
- Configuring Filter Settings
- Configuring Logging Settings
- Configuring Conferencing Server Settings
- Configuring Communicator Web Access Server Settings
- Configuring Mediation Server Settings
- Configuring Edge Server Settings
- Configuring Federation Settings
- Migrating Users from Live Communications Server 2005 SP1 to Office Communications Server 2007
- Summary
- Additional Resources
- 16. Diagnostic Tools and Resources
- 17. Troubleshooting Problem Scenarios
- Overview of the Troubleshooting Process
- Resolving Common Problem Scenarios
- Summary
- Additional Resources
- 15. Administration
- VI. Technical Reference
- 18. Office Communications Server 2007 Fundamentals
- Understanding Session Initiation Protocol
- Understanding SIP Routing
- Understanding the Globally Routable User Agent URI
- Understanding Enhanced Presence
- Understanding Authentication in Office Communications Server 2007
- Security Features of Office Communications Server 2007
- Summary
- Additional Resources
- 19. Microsoft Office Communications Server 2007 Internals
- 18. Office Communications Server 2007 Fundamentals
- A. System Requirements
- Index
The Mediation Server is a server role necessary to bridge the PSTN traffic to and from the media gateway to the Office Communications Server network. Because some existing media gateways do not currently support the SIP protocol over TCP and optimized media codecs used by Office Communications Server 2007, the Mediation Server is needed to translate the RTAudio and RTVideo codecs to the G.711 codec commonly used by media gateways. In addition to performing codec translation, the Mediation Server performs reverse number lookups (RNL) to resolve phone numbers from incoming calls arriving from the media gateway to the corresponding SIP URI. After phone numbers are resolved into SIP URIs, the Mediation Server routes the call to the user's home server.
Table 2-9 lists the hardware requirements for the Mediation Server role.
Note
To get the most up-to-date information about the Media Server role, refer to http://www.microsoft.com/technet/prodtechnol/office/communicationsserver/evaluate/sysreqs/ocs-ee.mspx#EBG.
Table 2-9. Hardware and Software Requirements for Mediation Server
Component | Requirement |
|---|---|
Computer and processor | Dual processor, dual core with 3.0-GHz or faster processor for up to 120 concurrent calls |
Memory | 2 GB or more of RAM recommended |
Cache | 1-MB L2 per core recommended |
Hard disk | 1 SCSI hard drive with 36 GB of available hard disk space recommended |
Network | 2 1-GBit NICs: one NIC connected to the Office Communications Server network, and the second NIC connected to the media gateway |
Operating system | Windows Server 2003 Standard Edition, Windows Server 2003 R2 Standard Edition, or higher |
Other | Active Directory directory service for Windows Server 2003 or Windows 2000 with Service Pack 3 required |
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