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SESSION CODE: EXL201. Andrew Ehrensing Solution Architect Microsoft Corporation. Audio, Video, and Web Conferencing architecture and experience. What you’ll learn today. Deeper look at audio, video, and web conferencing workloads of the Lync 2010 client

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Audio video and web conferencing architecture and experience l.jpg


Andrew Ehrensing

Solution Architect

Microsoft Corporation

Audio, Video, and Web Conferencing architecture and experience

(c) 2011 Microsoft. All rights reserved.

What you ll learn today l.jpg
What you’ll learn today

  • Deeper look at audio, video, and web conferencing workloads of the Lync 2010 client

  • Conferencing Architecture, Call Flows, and Troubleshooting

  • Details on Features, Requirements, Bandwidth

  • Lync on-premise and Lync Online differences

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Lync Conferencing Roadmap

  • OCS 2007 R2

    • Communicator

      • Audio Conferencing

      • Desktop Sharing

    • Live Meeting

      • Audio conferencing

      • Desktop & Application Sharing

      • PowerPoint Presentations

      • Whiteboard

      • Polling, Q&A, etc.

  • Lync 2010 Server

    • Lync 2010

      • Richer Audio Conferencing

      • Desktop & Application Sharing

      • PowerPoint Presentations

      • Whiteboard

      • Polling

    • Live Meeting

      • Available during migration to 2010

      • Use for very large meetings

  • Lync Online / Office 365

    • Lync 2010 CU2+

      • Public Beta NOW

      • General Availability in June

      • OrgID sign-in

      • Audio Conferencing Partners for PSTN Audio

      • Not a soft phone

      • Regular updates and improvements

    • Live Meeting

      • Separate Service only

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Unified Client, Rich Conferencing Features

  • Basics

  • Presence/discovery integration

  • Rich IM with federation

  • Interop with Communicator, Messenger for AV, IM with public internet connectivity* WL Messenger only with O365

  • Ad hoc conference escalation

Conference Management

  • Scheduling via Outlook with admin support, and via Web*

  • Join with Lync, Web App, Attendee clients

  • Lobby support for easy join

  • Manage permissions and roles

  • Content

  • Desktop sharing

  • Application sharing

  • PowerPoint with animations

  • Whiteboarding

  • Polling

  • Navigate ahead/back in slides and to other content

Voice and Video

  • PSTN Audio on premise with IVR

  • Audio Partners (ACPs) in O365

  • Scalable Voice, Video

  • Device/IP Phone support (on premise)

  • Response Group, Private Line, Call Park

  • >90% VoiceCon RFP complete

    • Up from 60% in 2007, 78% in 2009

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Ad-hoc conferencing from IM and Phone

Scheduling, Join, In-meeting experience


End to End Web Conferencing User Experience

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Conferencing Scenarios

Rich conference calls

Work with people anywhere

Effective Team Meetings

Professional Presentations

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Web Conferencing Architecture

AV Conferencing Server

Front End Server



Focus Factory

Backend SQL DB Server

Web Components (IIS)

IM Conferencing MCU



Join Launcher

Web Conferencing MCU

Web App Server

App Sharing MCU

Audio Conf Provider MCU

Conference Service

Personal Virtual Assistant

Machine Boundary

Group Virtual Assistant

Process Boundary

Web Application

Audio Conferencing

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Web Conferencing Flow

SQL Backend

Audio Conf






Conferencing Server Factory



App Sharing Conf MCU





Focus Factory



Web Conf MCU
















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Join Details


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Video – Supported Formats

  • HD

  • High Definition

  • 1280x720(16:9), 25 fps, 1.5 Mbps

  • Quad Core > 2 GHz

  • CIF

  • Common Interchange Format

  • 352x288, 15 fps, 350 kbps

  • Single Core > 1.5GHz

  • VGA

  • Video Graphics Array

  • 640x480, 25 fps, 700 kbps

  • Dual Core > 1.9GHz

  • Panorama

  • Polycom CX5000 RoundTable

  • 1056x144 (22:3), 15 fps, 350 kbps

  • Single Core > 2 GHz

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On-premise Audio Conferencing

  • Replaces ACP for ~85% of calls (Gartner)

  • Requires PSTN Gateway deployment on premise

  • Features

    • Name Recording, Entry/Exit announcements (default OFF)

    • Supports Lobby for easy join (Presenters grant access)

    • Easy PIN management, default no expiry

    • Recording from Lync client

    • Rich language support for IVR

  • Per-pool Limits (10 FEs/pool):80K users/pool, max mtg:250

  • Limit of 6000 simultaneous users per pool:

    • 900 PSTN-only meetings, 2100 in VoIP-only, 2400 mixed

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Online (ACP) Audio Conferencing

  • Sign up with an ACP partner

    • Initially British Telecom, InterCall, Premier Global

  • Integrates automatically with VoIP users via VoIP bridge

  • Features

    • Dial-in from phone (details in invite, and conversation window)

    • Dial-out to self and others via ACP

    • Mute individuals from Lync

    • Eject individuals from Lync

    • End conference (ends for all Lync and PSTN users)

    • DTMF tones via ACP for Mute, Unmute

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Web Conferencing

  • Scale to 250 users per meeting

  • Screen sharing (256, 1000, 3500 kbps)

    • Supports P2P to reduce server traffic

    • Share Desktop, single app, multiple apps

    • Controllable via in-band policy settings

  • PowerPoint (20, 200, 500 kbps)

    • Converts to PPT 2003 and DHTML (web app), removes AV

    • Rich transitions, asynchronous navigation

  • Whiteboard/PPT Annotations (20, 200, 500 kbps)

    • Text support for note taking, clipboard support, images

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  • Clients can now be managed using Lync Server Control Panel, the Windows PowerShell command-line interface, or both. Settings are sent to clients using in-band provisioning as opposed to group policies.

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Client Troubleshooting

  • Call Quality Notifications to end user (next slides)

  • Logging

    • Enabled/disabled by policy/in-band setting

    • User can turn on/off in Options dialog if no policy set

    • Written to %userprofile%/tracing

    • Tools to analyze logs

  • Collect Logs

    • Packages logs into ZIP file with screen shot, voice sample

    • Enabled via regkey or policy/in-band setting

    • User sends to their IT admin on their own

  • Call Detail Records & Reporting on Server (on-premise)

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Events and Measurements

Call Quality Notifications

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Events and Measurements

Call Quality Notifications (cont.)

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CDR & Reporting improvements

  • MS diagnostics aka “msdiags” included with all SIP 4xx, 5xx, 6xx, BYEs

    • ms-diagnostic:<error code>;reason=“xxx”;description=“yyy”;source=“zzz” [;custom-param=“foo”]

  • Msdiags are:

    • Specific – one error code per distinguishable failure case

    • Admin Friendly – They describe failure from end user point of view; not in terms of internal implementation details, use official product nomenclature for server names (no hex codes)

    • Actionable – Many msdiags contain troubleshooting steps

    • Categorized – Success, UnExpectedFailure, ExpectedFailure

  • Greatly improved reliability reports on the monitoring server

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Top 5 takeaways

  • True Unified Client

    • One client for IM/P, Audio, Video, Web Conferencing

    • Easy tools to learn once

  • Improved Meeting Join

    • Simple meeting links

    • Lobby for presenters to admit/reject attendees

    • Click-to-join from mobile phones

  • PSTN Dial-In and Dial-out Conferencing

    • On premise replacement for most audio conferencing needs

    • Online ACP partnerships

  • Call Quality Checks and Diagnostics

    • Network health indicator

    • Notifications for end user troubleshooting

    • Make a test call and check call quality

    • IT Tools to analyze issues/logs

  • Office365 / Lync Online is ready for Beta now, Production in June

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Question & Answer Session

(c) 2011 Microsoft. All rights reserved.

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Michael McLean

Sales Engineering Manager


Polycom Solutions for Microsoft Unified Communications

(c) 2011 Microsoft. All rights reserved.

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Polycom Solutionsfor Microsoft UC

HDX family of video systems

RPX, OTX, ATXfor telepresence

CX IP and USB desk and common area phones

CX IP and USB Conference Room

DMADistributed Media Application ServerRMXReal-time Media Conference Platform

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RMX Integration with OCS/Lync Server

  • Enables OCS/Lync clients to participate in RMX-based conferences

  • Extends Continuous Presence to Communicator/Lync

  • Provides interconnectivity between SIP clients and H.323 endpoints

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MCU Comparison – Different by Design

  • OCS/Lync MCU

    • Integrated into the desktop experience

    • Active speaker switching

    • Desktop-quality resolution

  • RMX

    • Simultaneous integration capability

    • Numerous layout options

    • Supports everything from high definition through desktop resolution

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Lync A/V MCU Integration

  • CCCP Protocol

    • Signaling protocol used within SIP in multiparty calls

    • Developed for OCS, persists in OCS R2 and Lync

    • Polycom only supports CCCP with Lync

  • HDX Support

    • Same as RTV

  • Availability – Q2

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Conferencing Through Outlook using PCO or Online Meeting

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Using Outlook to Schedule a Video Meeting

  • One click to add conferencing to a meeting

  • Meshes with existing workflow

  • No need to remember numbers or settings

  • Fully customizable

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HDX Smart Rooms

  • Rooms now display daily calendar from Exchange

  • Immediately know if room is available

  • Enhances room experience

  • Makes video more approachable

  • Join a meeting with one click

  • No more fumbling for numbers

  • Reminders for upcoming meetings

  • Easy to join from room system or software client

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Using Outlook to Schedule Online Meeting

  • One click to add conferencing to a meeting

  • Meshes with existing workflow

  • No need to remember numbers or settings

  • Native Support using Lync MCU

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Enrol in Microsoft Virtual Academy Today

Why Enroll, other than it being free?

The MVA helps improve your IT skill set and advance your career with a free, easy to access training portal that allows you to learn at your own pace, focusing on Microsoft technologies.

  • What Do I get for enrolment?

  • Free training to make you become the Cloud-Hero in my Organization

  • Help mastering your Training Path and get the recognition

  • Connect with other IT Pros and discuss The Cloud

Where do I Enrol?

Then tell us what you think. [email protected]

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© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.

The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

(c) 2011 Microsoft. All rights reserved.