ࡱ>  |bjbj ;,********8-+,*}(1566657:o?\A0$G,*tD5757tDtD**664$DHDHDHtD|*6*6DHtDDHDHJ΁&60:*DRPތA<}sE0s&s*&B>9C,DHeC$CBBBFTBBB}tDtDtDtDsBBBBBBBBB ):  Technical Considerations for Microsoft Office Live Meeting Service Deployment Whitepaper Published: April, 2007 Updated: August 2009 For the latest information, please see  HYPERLINK "http://www.microsoft.com/uc/" http://www.microsoft.com/uc/ Information in this document, including URL and other Internet Web site references, is subject to change without notice. Unless otherwise noted, the companies, organizations, products, domain names, e-mail addresses, logos, people, places, and events depicted in examples herein are fictitious. No association with any real company, organization, product, domain name, e-mail address, logo, person, place, or event is intended or should be inferred. Complying with all applicable copyright laws is the responsibility of the user. Without limiting the rights under copyright, no part of this document may be reproduced, stored in or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of Microsoft Corporation. Microsoft may have patents, patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. Except when expressly provided in any written license agreement from Microsoft, the furnishing of this document does not give you any license to these patents, trademarks, copyrights, or other intellectual property. This White Paper is for informational purposes only. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS DOCUMENT. 2009 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista, Active Directory, Excel, Outlook, PowerPoint, RoundTable, SharePoint, and SQL Server are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. All other trademarks are property of their respective owners. Table of Contents  TOC \o "1-3" \h \z \u  HYPERLINK \l "_Toc185213572" Introduction  PAGEREF _Toc185213572 \h 4  HYPERLINK \l "_Toc185213573" Scope of this Whitepaper  PAGEREF _Toc185213573 \h 4  HYPERLINK \l "_Toc185213574" New in 2007 Release of Live Meeting  PAGEREF _Toc185213574 \h 5  HYPERLINK \l "_Toc185213575" 3.1 Integrated Media  PAGEREF _Toc185213575 \h 5  HYPERLINK \l "_Toc185213576" 3.2 Training and Events  PAGEREF _Toc185213576 \h 5  HYPERLINK \l "_Toc185213577" Network Planning  PAGEREF _Toc185213577 \h 6  HYPERLINK \l "_Toc185213578" Bandwidth Considerations  PAGEREF _Toc185213578 \h 8  HYPERLINK \l "_Toc185213579" 5.1 Downloading the Live Meeting client  PAGEREF _Toc185213579 \h 8  HYPERLINK \l "_Toc185213580" 5.2 Uploading Meeting Content  PAGEREF _Toc185213580 \h 9  HYPERLINK \l "_Toc185213581" 5.3 PowerPoint Presentations  PAGEREF _Toc185213581 \h 10  HYPERLINK \l "_Toc185213582" 5.4 Microsoft Office and Other Document Types  PAGEREF _Toc185213582 \h 11  HYPERLINK \l "_Toc185213583" 5.5 Whiteboards and Polls  PAGEREF _Toc185213583 \h 12  HYPERLINK \l "_Toc185213584" 5.6 Application Sharing  PAGEREF _Toc185213584 \h 12  HYPERLINK \l "_Toc185213585" 5.7 Desktop Sharing and Remote Control  PAGEREF _Toc185213585 \h 14  HYPERLINK \l "_Toc185213586" 5.8 Desktop Snapshots  PAGEREF _Toc185213586 \h 14  HYPERLINK \l "_Toc185213587" 5.9 PSTN Audio Conferencing  PAGEREF _Toc185213587 \h 14  HYPERLINK \l "_Toc185213588" 5.10 VoIP Audio  PAGEREF _Toc185213588 \h 14  HYPERLINK \l "_Toc185213589" 5.11 Hybrid VoIP and PSTN Audio  PAGEREF _Toc185213589 \h 15  HYPERLINK \l "_Toc185213590" 5.12 Webcam and Microsoft RoundTable Video  PAGEREF _Toc185213590 \h 15  HYPERLINK \l "_Toc185213591" 5.13 Viewing Recordings  PAGEREF _Toc185213591 \h 15  HYPERLINK \l "_Toc185213592" 5.14 Downloading/Printing Meeting Slides and Results to the Desktop  PAGEREF _Toc185213592 \h 15  HYPERLINK \l "_Toc185213593" Security Considerations  PAGEREF _Toc185213593 \h 16  HYPERLINK \l "_Toc185213594" 6.1 Data Protection  PAGEREF _Toc185213594 \h 16  HYPERLINK \l "_Toc185213595" 6.2 Connection Security  PAGEREF _Toc185213595 \h 16  HYPERLINK \l "_Toc185213596" 6.3 Access Security  PAGEREF _Toc185213596 \h 17  HYPERLINK \l "_Toc185213597" User Provisioning  PAGEREF _Toc185213597 \h 18  HYPERLINK \l "_Toc185213598" Live Meeting Client Deployment  PAGEREF _Toc185213598 \h 19  Introduction The 2007 release of the Microsoft Office Live Meeting service is the latest version of Microsofts enterprise class solution for delivering Web-based, real-time, and location-independent interactive meetings and collaboration capabilities to business users. The ability to organize, present, and attend interactive meetings, from any Internet connected location is appealing to organizations that are dispersed over any significant geographic area or want to provide real-time interactive content to customers, vendors, and remote employees. Reducing potential travel expenses, while providing more timely and efficient distribution of information, make the Office Live Meeting service a practical solution for any size business. The Live Meeting service is a hosted conferencing service. The infrastructure needed to provide interactive conferencing and real-time collaboration capabilities is hosted and maintained in Microsoft Live Meeting data centers. In addition to the Live Meeting service, Microsoft offers on premise conferencing using the same Live Meeting client, as part of Microsoft Office Communications Server 2007. Office Communications Server also enables several other communication technologies, such as presence, instant messaging (IM), and voice. Both Office Communications Server and the Live Meeting service satisfy the core conferencing scenarios, but enhanced functionality around training and events is available only with the Live Meeting service. These differences are described in Table 3 in the Appendix. Scope of this Whitepaper This white paper explains the new features available in the 2007 release of the Live Meeting service, describes the hosting architecture, and provides technical information on commonly asked questions regarding implementation, networking issues, and meeting and data security. SectionTopics CoveredNew in 2007 Live Meeting ReleaseNew features and changes in Live MeetingNetwork PlanningNetwork configuration for optimal utilization of Live MeetingBandwidth ConsiderationsActions and features that affect bandwidth utilizationSecurity ConsiderationsHow data and connection security features are provided in Live MeetingUser ProvisioningHow users are added to the Live Meeting environmentLive Meeting Client DeploymentGetting the Live Meeting client to the user New in the 2007 Release of the Live Meeting service The 2007 release of the Live Meeting service contains many new features and capabilities added since the introduction of Live Meeting 2005. These features are not limited to what the user can see (we will discuss this in some detail later in this document) but also include changes in the infrastructure, such as the Intrusion Detection System and Microsoft ForefrontTM virus scanning of all Live Meeting traffic. Customers are able to tailor the capabilities and functionality of the Live Meeting service to the needs of their organization and provide varying levels of services to different individuals and groups within their organization. A Web-based administration console is available to administrators of the Live Meeting service, giving them the access they needfrom any location with an Internet connectionto create, manage, and monitor the corporate use of the Live Meeting service. 3.1 Integrated Media It is in the rich Windows-based Live Meeting client that you will see the most significant changes. The new Live Meeting user interface ties together a multitude of media types into a single integrated experience. The Web-based client for users on locked-down computers, Solaris operating system, or Macintosh operating systems (or any Java-based system that meets the necessary requirements), has been updated so that the presentation experience for these users is similar to that of users using the Windows-based client. Table 1: Integrated Media Features FeatureLive Meeting 2007Live Meeting 2005Rich media presentations (including Microsoft Windows Media Player and Adobe Flash Player)NEWLive webcam video XE "Live webcam video" NEWIntegrated Microsoft Office PowerPoint viewer XE "Integrated Microsoft Office PowerPoint viewer" ""Drag and drop upload XE "Drag and drop upload"  to view a wide range of documents "Panoramic video XE "Panoramic video"  with Microsoft RoundTable XE "RoundTable" TMNEWMulti-party two-way VoIP audio XE "Multi-party two-way VoIP audio" NEWPSTN and VoIP audio integration XE "PSTN and VoIP audio integration" NEWAudio conference call controls XE "Audio conference call controls" ""Active speaker indicator XE "Active speaker indicator" NEW3.2 Training and Events The ability to host training and events are key benefits of the Live Meeting service. The Live Meeting service has been updated in many areas to improve the attendee and presenter experience for classes and presentations. Table 2: Training & Event Features FeatureLive Meeting 2007Live Meeting 2005Polling XE "Polling" ""Shared recordings XE "Shared recordings" ""Microsoft event services XE "Microsoft event services" ""Event and class registration XE "Event and class registration" IMPROVED"APIs for integration with e-learning systems XE "APIs for integration with e-Learning systems" IMPROVED"Public events page XE "Public events page" NEW Advanced testing and grading XE "Advanced testing and grading" NEWHigh fidelity recordings XE "High fidelity recordings" NEW Personal recordings XE "Personal recordings" NEW Virtual Breakout Rooms XE "Virtual Breakout Rooms" NEWHandout XE "Handout"  distribution (file transfer)NEWShared Notes PaneNEW Network Planning As a hosted service, Live Meeting can operate in a large variety of network topologies. Ideally, the administrator is able to make minor configuration changes to routers and firewalls to provide an optimized user experience. However, the changes that may be required are minor and do not interfere with the customers ability to secure their own network. The configuration changes include: Enabling ports 80 and 443 to access LM servers Disabling authentication for Live Meeting audio and video traffic when an authenticating HTTP proxy is employed Allowing UDP traffic for better audio and video performance (Optional) Adjusting internal routers and optimizing internal network path for audio and video traffic Filtering traffic, if required by ISP SLA These relatively minor changes to your network configuration will provide a significant improvement for your Live Meeting users. Smooth integration and ease of use will make it more likely for your users to quickly integrate the features of Live Meeting into their workflow. These network configuration changes are also the most significant actions for the IT department to enable the smooth adoption of the Live Meeting technology. At a minimum, the Live Meeting client must be able to access the Live Meeting servers over ports 80 and 443. If you already allow your users to access Web sites on the Internet, there is a good chance that your perimeter firewalls already allow traffic on these two ports. It is possible, however, that only port 80 is currently open, so in that case it would still be necessary to configure your firewalls to allow traffic on port 443. Making these ports available will give your users of Live Meeting client software full access to the capabilities of Office Live Meeting. If you employ an authenticating HTTP proxy, you must disable authentication for all Live Meeting traffic travelling over the HTTP and HTTPS ports (80 and 443). This ensures that Live Meeting audio and video packets successfully pass the perimeter. To provide an optimized user experience, with better video and audio performance, it is advisable to allow UDP traffic for the Live Meeting client. The Real-time Transport Protocol (RTP) that Live Meeting uses works best over UDP connections. The Microsoft RTP, which is based on IETF Standard 3550 and uses ports 8057 and 3478, is designed to provide end-to-end network transport functions for applications transmitting real-time data. The intent of the protocol design is to specifically provide a mechanism for getting real-time audio and video from point to point. If your network traffic control is not perimeter-based, you may need to enable the required port access and UDP traffic, not only on the routers that connect your users to the outside world, but also on routers that deal with internal traffic only. Fundamentally, you need to know what the network traffic path will be between your users and the Internet-based Live Meeting service. You want to be able to optimize the path between the Live Meeting client and Live Meeting backend, limiting the number of hops and optimizing UDP traffic to provide the necessary quality of service on the desktop-Internet path. If your users are complaining of dropped voices and video jitter or lockup, it is most likely due to the use of the Transmission Control Protocol (TCP) as the primary network transport, rather than the use of the User Datagram Protocol (UDP), and thus not a software issue with the Live Meeting client. Optimizing your network path can prevent help desk calls relating to the use of Live Meeting. Your contract with the service provider that provides your Internet access may require that they filter traffic that is delivered to your site. In these cases you must make sure that the appropriate changes are made to the filtering requirements specified by your service level agreement (SLA) with your provider. Bandwidth Considerations Given that Web conferencing use may increase bandwidth needs, it is important that corporate IT departments understand these conditions so that they can plan accordingly and establish policies to optimize their organizations Web conferencing experience. Microsoft has developed Live Meeting to deliver high-quality Web conferencing solutions using minimum network bandwidth. Table 3: Activity description summary ActivityDescriptionDownloading the Live Meeting ClientAcquiring and configuring the clientUploading Meeting ContentPreloading content for presentationsPowerPoint PresentationsHow PowerPoint presentations are handled in Live MeetingOffice and other Document TypesSupported document typesWhiteboards and PollsWhat can be done with these featuresApplication SharingSharing applications and bandwidth requirementsDesktop Sharing and Remote ControlHow this feature differs from application sharingDesktop SnapshotsGrabbing and annotating a desktop imagePSTN Audio ConferencingVoice access via PSTNVoIP AudioTwo-way VoIP for Live Meeting 2007Hybrid VoIP and PSTN AudioAttendee access over VoIP and PSTN simultaneously Webcam and Microsoft RoundTable VideoBandwidth requirementsViewing RecordingsLive Meeting Replay and High Fidelity RecordingsDownloading and Printing Slides, Results to DesktopControlling availability to attendees5.1 Downloading the Live Meeting client The Live Meeting Windows-based client is downloaded when the user first attends a meeting through the Live Meeting service. When upgrades to the client are made available, the user is prompted to download the upgrade before attending their next meeting, without requiring a reboot or re-launch of the browser. IT managers can choose to disable automatic upgrades to the client and instead roll out upgrades at their discretion. A user can set preferences on the Options dialog box, under Connection speed,. If a user sets their connection speed to a dial-up connection, the Live Meeting server does not download an entire Office PowerPoint file and instead sends only the PNG files, thus using less bandwidth. The Live Meeting server will also note these preferences and send fewer frames per second during an Application Sharing session.  Figure 1: Live Meeting Connection speed user preferences Microsoft Office Live Meeting Web Access is an alternative for users who cannot install or run the Windows-based Live Meeting client. Users running an operating system that is not compatible with the Windows-based Live Meeting client, such as Windows 98, Sun Solaris, or Apple Macintosh operating systems, can access Live Meeting sessions through Live Meeting Web Access. Live Meeting Web Access does not require the installation of any files; however it does download a Java applet for each meeting. The Java applet does not persist on the desktop; instead the browser downloads the necessary applet from the Live Meeting server each time the participant joins a meeting. 5.2 Uploading Meeting Content The foundation for Live Meeting interactivity is the applications ability to broadcast visuals of any type, including presentations, commonly used document types, such as Microsoft Office Word and Microsoft Office Excel, or any documents that can be rendered as a MODI file, to remote participants in real time. With Live Meeting and the ability to share just about any document over the Internet, there are virtually no boundaries to what, when, where, or with whom users can communicate. Meeting presenters can choose to upload meeting content prior to the Live Meeting session. Content only needs to be uploaded into a meeting space once. Live Meeting organizers can choose to populate their meeting place with persistent content that eliminates the need to upload the same content repeatedly, thus greatly reducing bandwidth requirements. 5.3 PowerPoint Presentations The bandwidth requirements for viewing PowerPoint presentations differ based on which of the following two clients the participant is using when attending the meeting: Windows-based Live Meeting client Live Meeting Web Access The Windows-based Live Meeting client gives the meeting participant a larger array of options and features, as well as the ability to view PowerPoint slides with full support for animations and transitions. The Live Meeting PowerPoint Viewer, available as part of the Windows-based Live Meeting client, displays PowerPoint slides with full support for animations and transitions, allowing presenters to take advantage of compelling effects in the online meeting. Dynamic slide support helps to focus audience attention and make presentations more engaging for remote participants. Animation support lets presenters or organizers select slide elements to appear at certain times and in a particular order (such as fly in, fade, and so on). Transitions are supported for effects when moving from slide to slide (such as wipe, cover, push, and so on) and Full Screen Mode allows participants to view a slide that fills the entire screen. Meeting participants who use the Windows-based Live Meeting client will view PowerPoint presentations in two stages as the presentation downloads to their browser cache. As the presenter moves through the meeting content, the attendees download compressed preview Portable Network Graphics (PNG) files of the entire slide set for immediate viewing, while in the background the full-fidelity PowerPoint slide is downloaded. This allows the presenters to move through material quickly without requiring large amounts of bandwidth on the part of attendees in order to keep up with the pace of the presentation. The total bandwidth consumed by a meeting participant during the session is equal to the size of the original PowerPoint presentation file, plus the compressed preview PNG files. The bandwidth requirements depend on the graphic characteristics of the source slide and the size of the displayed image. For typical business presentation slides, the size of converted preview PNG images in the Live Meeting client can range from 5 KB to 100 KB and average 40 KB. The full-fidelity PowerPoint slide will reflect the original size of the slide. Slides with bitmaps, complex graphics and animations, or deep and rich colors increase the overall slide size and bandwidth requirements.  Figure 2: Compression settings Information workers building PowerPoint files for Live Meeting sessions can minimize the time and bandwidth required for uploading their slides by incorporating best practices to lower file size. For example, compressing images such as photos to 96 dpi in PowerPoint 2007 works as follows: Select the image, click Compress Pictures, press Options, select E-mail (which will compress the image to 96 dpi) and then click OK, to compress the image. Live Meeting Web Access does not yet support full-fidelity PowerPoint. Meeting participants attending through Live Meeting Web Access will view the presentation as static, compressed PNG files. The bandwidth requirements will equal the total size of the compressed PNG image of the static slide. The PNG files are often small, consuming less bandwidth from the network. The Windows-based Live Meeting client begins to download the entire presentation to the browser cache as soon as the attendee joins the meeting. If the download is still in progress, or the attendee is viewing the meeting from the Web-based client, the service automatically downloads the next slide into the participants browser cache to ensure the participant keeps up with the meeting. This caching of information enables instant responses as the presenter moves to the next slide, regardless of bandwidth connection speed. Because the average presenter typically lingers and discusses each slide for 40-60 seconds, the automatic pre-caching ensures that the maximum wait for a new slide, even over a low-speed modem connection, is very short. In an effort to reduce overall network bandwidth requirements, IT managers may choose to add a network caching device, but this is not required. 5.4 Microsoft Office and Other Document Types Live Meeting allows presenters to share documents such as Office Word or Office Excel files, in addition to PowerPoint slides. Regardless of which Live Meeting client an attendee is using during the meeting, non-PowerPoint files will be downloaded as MODI files. These files are typically similar in size to the original file, so bandwidth consumption depends on the size of file being uploaded. 5.5 Whiteboards and Polls Many media types in a Live Meeting presentation are less bandwidth-intensive than slides. Whiteboards (both graphics and text), polling questions, interactive questions and answers, and audience chat are all based on an extremely lightweight messaging architecture that minimizes bandwidth use while maximizing interactivity. 5.6 Application Sharing Application Sharing is an extremely powerful, interactive element of Live Meeting. This compelling feature allows a presenter to share access to any selected application on his or her desktop with meeting participants. In turn, the presenter can turn over control to an attendee and allow them to operate any software application, create files, or edit documents on the presenters computer without the need for attendee plug-ins. Live Meeting lets users show anything on their computer instantly to remote audiences. Presenters can choose to share their whole screen or only a portion to keep the audience focused on the key information. By sharing applications from their desktops, presenters are able to engage with their audiences in interactive product or software demonstrations from any location. Live Meeting provides the following bandwidth controls for application sharing: Variable download rate based on presenters or attendees connection speed, whichever is slower, to maintain synchronization Only the portion of the screen that has changed is broadcast to attendees Automatic adjustment of data flow to match each participants available bandwidth Available bandwidth allocated across entire pool of users rather than first come, first served Application sharing captures the graphic images on the presenters screen and broadcasts these pictures to each attendee at a dynamic rate depending on the attendees available bandwidth. The rate can vary anywhere from five entire screens sent to the attendee per second to less than one screen sent per second. The image on the screen is separated into smaller tiles, and image analysis is performed in such a way that only those tiles that have changed since the last screen update are broadcast to meeting attendees. Depending on how much change occurs in a given sequence of frames, this can substantially reduce the overall bandwidth used. Although only the differences in the screen image are sent to each attendee, broadcasting graphic images can be bandwidth-intensive. Several architectural design points in the Live Meeting implementation of Application Sharing recognize this and seek to use bandwidth more efficiently. Each attendee is given as many screen updates as their bandwidth will allow but no more, with the rate of screen updates being reactive in case the available bandwidth changes. As a result, users on slow network connections will have fewer image updates to process and receive, whereas those on faster network connections will receive more frames and a higher-quality picture. If an attendees available bandwidth diminishes due to other network uses (such as a background file transfer), the number of image updates sent to that attendee automatically decreases so that the attendee can still keep up with the presentation in real time. The amount of bandwidth used by the presenter in the Application Sharing session is limited either by the bandwidth of the presenters own network connection or that of the attendee with the fastest connection, whichever is reached first. The bandwidth usage discussed here refers to peak bandwidth usage, when many changes are happening on the presenters screen at once. Most software application images are comprised of a user interface image that does not change rapidly or frequently, meaning that during the Application Sharing session, average bandwidth usage is much less than the peak usage described above. Table 4 below shows peak bandwidth measurements for different scenarios. Table 4: Bandwidth Measurements Peak Bandwidth Measured in Microsoft Office Live Meeting Application SharingScenarioLAN Bandwidth (100 Mbps)LAN Bandwidth (10 Mbps)Modem Bandwidth (56 Kbps)*Web browsing an online application with Internet Explorer 138 Kbps102 Kbps56 KbpsSharing a CAD application rendering in 2D and 3D views106 Kbps102 Kbps56 KbpsSharing a Microsoft Office Excel spreadsheet containing 3D charts38 Kbps39 Kbps13 Kbps*User Preferences were set to Automatically detect my connection speed for purposes of this test. Bandwidth consumption may be lower if the user selects I have a dial-up connection 56K modem. In each of the above scenarios, the bandwidth is given for a client on a 100 Mbps local area network connection, a 10 Mbps local area network connection, and a client using a standard 56 Kbps dial-up connection. The highest bandwidth use is for Web browsing on the 100 Mbps local area network. In that case, Application Sharing uses only138% of a typical 100 Mbps Ethernet. The scenarios tested use screen sizes up to 1024 x 768 pixels. Smaller images lower the corresponding bandwidth requirement. Because Live Meeting Application Sharing automatically adjusts to available bandwidth, it can also share a connection with other sharing sessions and applications. So, if the total bandwidth on a LAN is limited by existing traffic, the application gracefully allocates the remaining bandwidth available to it across the entire pool of users, rather than prioritizing access to the first to arrive and allowing the remaining users to fall behind in the presentation. Application Sharing is not typically used throughout the entire presentation. Presenters may employ Application Sharing for a fraction of the total meeting period most often less than 15% of an entire Web conferencing session. The above bandwidth figures reflect only the peak bandwidth required during Application Sharing. To calculate the average bandwidth needs of a complete presentation, the appropriate adjustments must be made. 5.7 Desktop Sharing and Remote Control The Sharing Frame lets presenters select a specific area of their desktop that they want to share with meeting participants. For example, if there is only a portion of a confidential Word or Excel document the presenter wants to show to an audience, Live Meeting lets him or her select and share only that portion, while keeping the rest of the document private and unseen. Remote Control allows the presenter to transfer control of any document, application, or even his or her desktop to any remote participant. This means that both the presenter and the participant have full control of that application. This can be especially useful in environments where interactive collaboration with co-workers is necessary. Bandwidth consumption on the part of Desktop Sharing and Remote Control is similar to Application Sharing. 5.8 Desktop Snapshots In addition, the Snapshot feature allows a presenter to quickly capture any visual on their computer as a PNG file and show it to their audience. After a snapshot is taken, annotation tools can be used to highlight information quickly and conveniently. A snapshot can be effectively used in numerous situations, such as when the presenter wants to show all or a portion of the desktop or application, but does not want to use Application Sharing. The compressed PNG file will vary in size based on the presenters screen resolution; however these files are rarely more than 250 KB in size. 5.9 PSTN Audio Conferencing Many Live Meeting customers combine Web conferencing with an audio conference call to deliver a complete communications solution. In these cases, no data network bandwidth is consumed for audio, because the conversation is conducted through the phone network. 5.10 VoIP Audio VoIP audio is often used as the vehicle to deliver the audio portion of a meeting or event. Previous versions of Live Meeting included the one-way Internet Audio Broadcast technology for streaming Voice over Internet Protocol (VoIP) audio to other participants in the meeting. Because this was done over the Internet, participants needed only the speakers on their computer or a headset to participate. The 2007 release of Live Meeting adds the ability of two-way interactive VoIP audio, enabling meeting scenarios where multiple participants collaborate on a document or co-present a deck. The minimum bandwidth requirements for VoIP audio are 50 Kbps, while 80 Kbps are recommended for higher-quality experience. For additional information, see Table 2 in the Appendix. 5.11 Hybrid VoIP and PSTN Audio For attendees who might be connecting from remote locations over dial-up modem lines, it is possible to integrate PSTN audio conversations and VoIP communication in the same meeting. It is possible for attendees on low-speed network connections to participate in Live Meeting events as long as they can provide separate connections for voice and data. The remote user, joining a meeting from a hotel room with poor data connectivity, can use a dial-up modem connection for the data part of the meeting and their cell phone for the voice connection. 5.12 Webcam and Microsoft RoundTable Video The video component of any Live Meeting presentation or event can be the key that keeps the attendees involved and participating. To facilitate the use of video, Live Meeting supports both traditional webcams and the Microsoft RoundTable video camera, which allows for a 360 degree view of the conference room. A basic webcam requires from 50 to 350 Kbps of bandwidth; the added capability of the RoundTable camera doubles the bandwidth requirements, pushing them to a minimum of 100 Kbps and a maximum of 700 Kbps. 5.13 Viewing Recordings Live Meeting organizers often use the recording feature to record a session for playback at another time, either for training or to capture the information in the meeting for someone who may have been unable to attend. If Local Recordings are used, no data travels between the client computers and the Live Meeting service. When Shared Recordings are used, the Live Meeting service creates recordings in two formats: Live Meeting Replay and High-Fidelity Format. For Live Meeting Replay, standard streaming media is used, and is encoded at 220 Kbps. As a result, each viewing consumes approximately the same amount of bandwidth. As this is an industry-standard encoding format, there are several options available from network equipment and service providers to help optimize your bandwidth consumption. 5.14 Downloading and Printing Meeting Slides and Results to the Desktop With Live Meeting, participants are able to download local copies of presentations and meeting content. The results are delivered in Adobe Portable Document Format (PDF) in a similar size to the original uploaded slide set or document. The PDF files are delivered or streamed from the Live Meeting data center, once per requestor. Live Meeting gives meeting organizers control over download permissions, and content download on a per meeting basis. Security Considerations Because security is such an important issue for every business today, Microsoft incorporated security features into the Live Meeting network, for users connecting to the network and the customer data that is stored on the Live Meeting service database servers. Remember that development for Live Meeting, as with all current Microsoft projects, is done under the auspices of the Microsoft Trustworthy Computing Initiative, the details of which can be found at  HYPERLINK "http://www.microsoft.com/mscorp/twc" http://www.microsoft.com/mscorp/twc. Three aspects of security are reviewed in this paper: data protection, connection security, and access security. 6.1 Data Protection The actual data customers upload to the Live Meeting data centers is regularly backed up across data center boundaries. Thus, if a single data center goes down, while there might be some minimal disruption of service to customers, the customer data remains intact. Data stored on the Live Meeting network is protected regardless of location. All content uploaded to the data centers on the Microsoft servers uses 128-bit AES encryption. The data centers also receive third-party certification in the form of the Cybertrust Security Certification for both the Live Meeting client and the infrastructure of the data centers. This certification, among other things, can help businesses enact policies to become or stay compliant with compliance regulations, such as Sarbanes-Oxley and HIPAA. All meeting content moved to and from the Live Meeting service data center servers is processed through a Microsoft Forefront front end, which does real-time scans for viruses and malware, adding an additional layer of data protection. 6.2 Connection Security All data sent over the network is encrypted and connections are made using Secure Sockets Layer (SSL) and Transport Layer Security (TLS). Data is not sent in the clear to reduce the risk of packets being intercepted and decoded to provide usable information to an unauthorized access attempt. The data centers themselves maintain eight separate layers of software security to help protect the Live Meeting infrastructure: Filtering Routers Firewalls Intrusion Detection Systems System Application Authentication Application Level Countermeasures Separate Data Network Authentication to Data ms Level Security These layers of protection include some things you would expect, such as firewalls, filtered routing, application authentication, and locked down Windows servers that only have the necessary services for Live Meeting running. Also included are a few features you might not have considered, such as a keeping the Live meeting network completely separate and isolated from the rest of the network communications that take place in the Live Meeting data center facilities. There are also application level countermeasures running which can help catch common attacks such as buffer overruns. Lastly, an Intrusion Detection System (IDS) provides real-time monitoring of all inbound and outbound Live Meeting traffic. The monitoring is heuristic and notifies the administrators in the event of changes in the usual traffic behavior patterns. The IDS performs protocol analysis and is constantly watching for port scanning and other precursor activities for network-based attacks. 6.3 Access Security Another important area is access security. Access security makes use of the controls that the Live Meeting Administrator can place on the access, participation, and content that users have with the Live Meeting service. Live Meeting delivers the following three levels of access control, ranging from public meetingswhere anyone with knowledge of the meeting ID can attend a meetingto password-protected meetings, to meeting access control listswhere an attendee must not only know of the meeting, have the location and a password for access, but also be on a pre-existing list of invited attendees. Open Meetings (Public Sessions, Minimum Security) Meeting Key (Optimum Security) Access Control Lists (Maximum Security) Meetings with access control lists assure users of who the attendees are (only the authorized name is permitted; users can not enter any other screen name and get access) and lets the organizers control who remains in the meeting in the event that the sensitive nature of content being discussed should be restricted to a different group of people than all of those who were originally permitted to attend. Meeting organizers can decide what level of access is appropriate for any meeting, and can, in fact, have different levels of access control for attendees based on their role, either as presenters or attendees. This granularity ensures that meetings can be configured to suit the needs of all involved. Customized security is available by integrating LDAP and a central directory service to provide a specific level of security linked to a user account. Within meetings, the meeting organizer is able to designate one of the two rolesattendee and presenterof attendees within the meetings, granting them pre-defined capabilities within that role. This prevents unauthorized access to materials or even the group of attendees, within a meeting, keeping the organizer in control, and helping to keep the meeting on track. Meeting organizers can give presenters the ability to disconnect any user from the meeting at any time, without disrupting the meeting. This real-time control and monitoring of meetings is an important feature of Live Meeting, allowing the organizers of a Live Meeting event to retain control of the meeting without the need for administrative intervention. User Provisioning There are two methods to set up users in the Live Meeting service: using the Live Meeting Service Portal and manually creating user accounts in Live Meeting Manager. For companies that are already using Active Directory Domain Services, the Live Meeting Service Portal can be used to automatically create Live Meeting accounts based on the organizational information in the corporate Active Directory. This allows authenticated Windows users to log into Live Meeting without entering a Live Meeting-specific user ID and password. The Live Meeting account settings (such as default meeting options) will be synchronized automatically with the users Active Directory setting each time the user logs into Live Meeting through the Intranet portal. Users can also be created from the Administrators area on the Live Meeting Manager Web site. After logging into the site, the Administrator can use the Memberships option to create, edit, and delete members Live Meeting accounts. When you create a user manually, you need to explicitly identify their role, as follows, in the Live Meeting hierarchy: AdministratorMembers with full administrative rights to Live Meeting, including creating and deleting other members. OrganizerMembers with the ability to schedule Live Meeting sessions. MemberMembers who can access Live Meeting events and features. When these roles are assigned, there is a default set of privileges given to the member. The Administrator can selectively modify the default permissions from the Live Meeting Manager console. Regardless of the method that is used to provision the user account, new users are automatically sent a welcome-kit -email explaining that they are now configured to access the Live Meeting service. Live Meeting Client Deployment The Live Meeting client can be installed on the end-users computer in two ways. Pre-installed through Microsoft Systems Management Server Auto-installed from a Live Meeting invitation In a corporate environment, Systems Management Server can be used to deploy the Live Meeting client to users who need the software. This puts the onus on the IT department to make sure that the client is appropriately deployed and updated as necessary. You can select a totally silent install option, which places the Live Meeting client software on the end-user computer without any interaction required. The automatic installation is most commonly used. When a user receives a meeting invitation, it includes a link to the client installation. The user software is then installed from the link provided in the invitation e-mail. It will first attempt to install the client in the same fashion that any Windows application is installed. If the end-user does not have sufficient rights for this type of installation, the application then installs in the user directory defined for the user by their limited access to the computer. This installation technique means that you are able to provide users with access to Live Meeting without changing the local security permissions on their computer (presuming they have some capability to write data to their own computer). Therefore, there is no need to reduce the level of security that you are currently maintaining on your end-user computers. Appendix Table 1. Minimum system requirements for the Windows-based Live Meeting client System ComponentMinimum RequirementDisplay ResolutionRequired: Super VGA 800x600 Recommended: Super VGA 1024x768 or higher Operating SystemWindows Vista operating system, 32-bit and 64-bit (running in 32-bit mode)1 Windows XP Professional with Service Pack 2 or Service Pack 3 (recommended) Windows XP Professional x64 Edition in 32-bit mode Windows 2000 Professional with Service Pack 4 and latest version of DirectX (required) Windows Server 2003 with Service Pack 2Computer/ProcessorData and Voice: 500-megahertz (MHz) or higher processor, Intel Pentium-compatible For webcam video: 1 GHz or higher For Microsoft RoundTable"!: 1.8 GHz or higherMemory256 megabytes (MB) of RAM Recommended: 512 MBDisk Space Needed for Installation125 MB Additional Space required for Personal RecordingsVideo MemoryVideo card with 64 MB of RAM (video RAM or VRAM) and Microsoft DirectX application programming interface generationFor VOIPSound card, speaker, and computer microphoneFor Sending VideoWebcam or Microsoft RoundTable deviceBandwidth Requirements for Data Only56 kbps or better (Recommended: DSL or Cable high speed internet access)Bandwidth Requirements for Voice and VideoMinimum2High-Quality2Voice50 kbps80 kbpsWebcam50 kbps350 kbpsRoundTable100 kbps700 kbpsOther SoftwareMicrosoft Office PowerPoint 2002 or later presentation graphics program or Microsoft Office Standard Edition or Professional Edition (which includes PowerPoint software) to upload presentations. Adobe Flash Player version 8 or higher to view Flash content in the meeting. On Windows Vista, Adobe Flash Player version 9.0.45 to view Flash content in the meeting. Windows Media technologies player, version 9 or later (version is checked when the meeting client starts) to view Windows Media content in the meeting.1 Uploading content is not available on Windows Vista 64-bit. 2The required and recommended bandwidth speeds are cumulative. For example, if you want to use voice, webcam, and Microsoft RoundTable, the minimum bandwidth would be 50+50+100=200 kbps. Table 2.Minimum system requirements for LM Web Access System ComponentMinimum RequirementDisplay Resolution800 600 screen resolution required for meeting attendees 1024 768 screen resolution required for presentersBrowser, Operating System, and Java Virtual Machine (JVM) Windows 2000 Internet Explorer 6.0 with Sun Java 1.6.0_11 Windows 2003 Internet Explorer 6.0 with Sun Java 1.6.0_11 Windows XP SP2, SP3 Internet Explorer 6 with Sun Java 1.6.0_11 Internet Explorer 7 with Sun Java 1.6.0_11 Internet Explorer 8 with Sun Java 1.6.0_11 Firefox 3.x with Sun Java 1.6.0_11 Safari 3.x with Sun Java 1.6.0_11 Windows Vista Internet Explorer 7 with Sun Java 1.6.0_11 Internet Explorer 8 with Sun Java 1.6.0_11 Firefox 3.x with Sun Java 1.6.0_11 Safari 3.x with Sun Java 1.6.0_11 Mac OS X v10.5.x Firefox 3.x with Apple Java 1.5.0_16 Safari 3.x with Apple Java 1.5.0_16 NOTE: Other Operating System, Browser, and Java Virtual Machine combinations may work; however, interoperability testing is not done against them nor is support provided for them.Memory64 MB RAMBandwidth56 Kbps modem (DSL, cable, or better recommended) with Microsoft Internet Explorer Internet browser or intranet connectionOther SoftwareMicrosoft Office PowerPoint 2002 presentation graphics program or later, or Microsoft Office Standard Edition or Professional Edition (which includes PowerPoint software) to upload presentations. Flash Player version 9 or higher to view multi-media data content slides. Windows Media technologies player, version 9 or 10 (version is checked when the meeting client starts) to view Windows Media content in the meeting. Apple QuickTime 7 or higher to view Windows Media content in the meeting on Macintosh. 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