OCS Technical Overview

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Microsoft Office Communications Server 2007 (Public Beta) Technical OverviewPublished: March 2007

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ContentsContents............................................................. ..............................3 Introduction..................................................................................... ..1 New Features............................................................ ........................2 Enterprise Voice ............................................. .............................2 On-Premise Web Conferencing............................................ ..............3 Multimedia Capabilities.......................................... ......................3 Group IM............................................................................. .....4 Data Collaboration.................................. ................................5 Audio and Video ............................................ .........................5 PSTN Connectivity................................................ ...................6 User Roles.......................................................... ..........................6 User Types......................................................................... ...........7 Meeting Security and Access............................................... .........7 Meeting Creation........................................................... ...............8 Scheduling a Meeting.............................................. ................9 Creating an Unscheduled Meeting................................... ........9 Meeting Activation....................................................................... .9 Meeting Deactivation.................................... .............................10 Meeting Expiration.......................................... ...........................10 Enhanced Presence............................................................ .............11 Federation Enhancements............................................................ ...12 Simplified Deployment and Management ......................................12 New Deployment Tool....................................................... ..........13 Management Console Improvements.........................................13 Universal Group Support................................. ...........................13 Enhanced in-band provisioning..................................................14 Integrated Address Book Server.................................. ...............14 Meeting Policies..................................................................... .....15 Call Detail Records.......................................... ...........................15 Support for Globally Routable User Agents URI...............................15 Overview of GRUU and SIP Routing Capabilities.........................15 Uses of GRUU........................................................ .....................16 Client Applications.............................................. ............................17 Conference Architecture................................................................. .18

Pool Configurations..................................................................... 18 Standard Edition Configuration .......................................... ...18 Enterprise Edition: Consolidated Configuration.....................19 Enterprise Edition: Expanded Configuration..........................20 Front End Server.................................................................. .......21 Focus......................................................................... ............22 Focus Factory ........................................ ...............................22 Conferencing Servers (MCUs).................................. ..............23 Conferencing Server Factory.................................................23 Internet Information Services (IIS).........................................24 Conference Data Storage................................... ........................25 Perimeter Network Configuration...............................................25 Access Edge Server............................................... ................26 Web Conferencing Edge Server.............................................26 A/V Edge Server........................................ ............................26 HTTP Reverse Proxy......................................................... ......27 Conference Protocols........................................................... .......27 Call Flows Among Conference Components............................... .28 Scheduling a Conference............................................... ........28 Creating an Unscheduled Conference.................................... 29 Joining a Conference............................................................. .30 What to Read Next......................................................... .................30

IntroductionMicrosoft Office Communications Server 2007 is the first Microsoft product to combine enterprise-ready IM (instant messaging), presence, conferencing, and unified communications in a single offering. Built on Microsoft Office Live Communications Server 2005, Office Communications Server 2007 provides richer presence capabilities, enhanced support for group IM, and improved administrative controls. To existing features such as federation and public IM connectivity, Office Communications Server 2007 adds real-time conferencing hosted on servers inside the corporate firewall. Like Live Communications Server 2005, Office Communications Server 2007 is available in two editions: Standard Edition and Enterprise Edition: Standard Edition. Hosts all server components, as well as the database for storing user and conference information, on a single computer. Standard Edition provides full functionality for small businesses. Enterprise Edition. Separates server functionality from data storage to achieve higher capacity and availability. An Enterprise Edition Pool consists typically of two or more Front End Servers, which are fronted by a hardware load balancer and connected to a Back-End Database. (It is also possible to deploy a single Front End Server without a load balancer.) Optionally, certain conferencing components can be deployed on separate computers for higher capacity and availability. Enterprise Edition is appropriate for medium, large, and very large organizations.

This guide is divided into two main sections: New Features and Conference Architecture. New Features provides a technical overview of Office Communications Server 2007s principal new features, including: On Premise Web Conferencing Group IM Audio and Video Enterprise voice (new in beta 3) Microsoft Office RoundTable communications and archival system Enhanced Presence Federation Enhancements Client Applications Simplified Deployment and Management Enterprise Pool Configurations Front End Servers Conferencing Components

Conference Architecture discusses:

2 Microsoft Office Communications Server 2007 (Beta 3) Technical Overview

Perimeter Network Topology Conference Protocols Call Flows Among Conference Components.

For information about IM, presence, and federation functionality carried forward from Live Communications Server 2005, see the documents posted on the Microsoft Office Online at http://office.microsoft.com/en-us/FX011526591033.aspx.

New FeaturesThis section provides a technical overview of new features in Office Communications Server 2007. These features are grouped under the following broad categories: Enterprise Voice On-Premise Web Conferencing Enhanced Presence Federation Enhancements Deployment and Administration Improvements

The following section, Conference Architecture, discusses the server architecture that makes possible the features described below.

Enterprise Voi