1. Nireshen Beerbul Senior Consultant Microsoft

2. Scope Voice with Office Communications Server Enterprise Voice Planning Deployment Scenarios Sizing and Topology Considerations Call Routing and Management Interoperability With Existing Telephony Infrastructure

3. Out of Scope Integrations that don’t involve Voice Client-based plug-ins PBX-based controls hosted inside Communicator Features, Experience, Capability vary widely Remote Call Control Office Communicator controls a PBX station set Consider a third party Gateway instead of an upgrade: Corebridge, Genesys, Estos

4. Agenda Prerequisites Enterprise Voice Elements Deployment Scenarios Recommendations & Next steps

5. Your current state? No voice with Office Communications Server…yet How do I get started with a pilot? Validate the technology & business case Pilot completed and successful How do I move the pilot to production? Breadth - more & different users & cases Initial deployment completed and successful How do I grow production to scale? Business critical, multi-site communications

6. Prerequisites to Deployment Windows Server 2003 Domain functional level AD used to store global settings & groups Single-forest & multiple-forest environments Exchange Server 2007 with Service Pack 1 Unified Messaging, Missed Call Notification, Auto Attendant, Outlook Voice Access Assess your IP Network for real-time traffic Bandwidth Latency & other network affects

7. Your IP Network Bandwidth Provision for streams of 45Kbps audio, 300Kbps video Modeling calling patterns: Intra/inter-office, external Other network affects Reduce delay: < 150ms E2E delay considered excellent (G.114) Some jitter (< 30ms) & loss (< 10%) can be handled Prioritizing Media with DiffServ Audio: Expedited Forwarding; Video: Assured Forwarding Centralized policy enforcement for Vista PCs Controlling Usage Manage the size of conferences, allowed media Set port range for media, per session BW limits, video quality

8. Your (future) Voice Network

10. Enterprise Voice Elements Mediation Server: Intermediate signaling and call flow Manage innovative elements of the SIP transaction: Inside, TLS/SRTP – Outside, TCP/RTP Transcode media flows from G.711 to RTAudio and SIREN Act as an ICE Client for PSTN-originated calls Provide quality metrics back to monitoring server Upstream telephony elements SIP/PSTN Gateway IP-PBX SIP Trunking Service

11. UC Open Interoperability Program (UCOIP) Qualification program for telephony infrastructure – SIP/PSTN Gateways, IP-PBXs & SIP Trunking Service Goal for seamless interoperability with Office Communications Server and Exchange Server Ensure Customers have positive experiences with Setup, Support, and Use of qualified devices Allows for scalable qualification of vendors http://technet.microsoft.com/UCOIP SIP/PSTN GatewaysIP-PBXsSIP Trunking Service Aculab, Audiocodes, Cisco, Dialogic, Ferrari, NEC, NET, Nortel, Nuera, Quintum, Tango Networks, Vegastream Innovaphone Mitel Nortel Seltatel Interoute Global Crossing Sprint

12. Tested IP-PBXs PBX vendors qualify their latest versions Customers want support for existing versions Where possible, Microsoft may test IP-PBXs To date: Cisco Unified Communications Manager Listed with qualified infrastructure on UCOIP OCS 2007OCS 2007 R2 CUCM 4.X4.2(3)_SR3a 4.2(3)_SR4b CUCM 5.X5.1(1b) 5.1(3e) CUCM 6.x6.1(1b) 6.1(3a)

13. Voice Deployment Continuum Voice Capabilities with an existing IP-PBX Long-term interoperability for all end-users Combined experience of Communicator & PBX Phone Mixed environment with PBX Some users will be on the PBX, others will move Mix expected to change over time Office Communications Server for Voice Enable a temporary transition state Prepare for your PBX-less future

14. Deployment Scenarios Overlay PBX: Shared Dial Plan Dual Forking: PBX rings to phone & Communicator Multiple Dial Plans: multiple numbers per user Networked PBX: Split Dial Plan Mediation Server located behind the PBX Connect using SIP/PSTN Gateway or Direct SIP Direct to PSTN: Owned Dial Plan Calls are sent/received directly with PSTN SIP Trunking from carrier or circuits to Gateway

15. Deployment Scenarios

16. Overlay PBX dual forking Calls from PSTN & PBX phones are forked by IP-PBX to Office Communications Server Any calls made by Office Communicator are also forked to IP-PBX Provides a blended, single number experience for end-users Each infrastructure element implements equivalent dial plan PBX upgrade required for Direct SIP plus Dual-Forking qualification

17. Overlay PBX multiple dial plans Each user has two numbers – one for Office Communicator & one for PBX No forking Users configure personal call forwarding between systems Configure with SIP/PSTN Gateway or Direct SIP to IP-PBX If using Gateway, trunk expense rises as size of deployment grows Fundamentally a transition over time, assume PBX phone goes away

18. Deployment Scenarios

19. Networked PBX using a SIP/PSTN Gateway Users are moved off the PBX Calls delivered from PSTN to PBX and routed to SIP/PSTN Gateway Wide availability of Gateways for geography & circuit configurations Dialing behavior preserved for calls between all users Fast & inexpensive to deploy for pilot & smaller production Double-trunking through the PBX increases cost with scale

20. Networked PBX Direct SIP Users are moved off the PBX Calls delivered from PSTN to IP-PBX Mediation Server connects directly to SIP interface on supported IP-PBX But still a server to server trunk – not client to client due to lack of ICE negotiation, security, etc. May require additional software, licenses or upgrades to the IP-PBX As production deployments grow, Direct SIP has OA&M advantages

21. Deployment Scenarios

22. Direct to PSTN IP-IP Gateways Mediation Server sits behind same SIP/PSTN Gateway used by IP-PBX Supported configuration as long as the Gateway is qualified with OCS Gateway routes based on DID or trunk group, may require configuration on the carrier Some Gateways support doing an AD Query for routing determination Increased flexibility and negligible impact to trunking costs when moving users from PBX

23. Direct to PSTN using a SIP/PSTN Gateway Separate PSTN interconnect infrastructure from PBX Number routing change or new numbers provisioned by Carrier Requires zero PBX changes, eventually move trunks from PBX to SIP/PSTN Gateway Internal calls between user groups routed through PSTN

24. Direct to PSTN SIP Trunking Connecting Mediation Server to SIP Trunking Service No on-premise third party products (SBCs, etc.) required Uses nailed up VPN to Service Provider for security Brings telephony trunking into datacenter consolidation strategy Still early days…not all carriers signed on to support modern (SIP Connect 1.1) standards

25. More Options All of these can be deployed in a mixed fashion Scenarios can change as deployment matures Trunking both to IP-PBX and PSTN clouds Use Gateways for Pilot, Direct SIP to HQ IP-PBX, keep some users on PBX but move others PilotPilot DeployDeploy ScaleScale

26. User Populations to Consider Mobile & Remote Great pilot users to validate capability Discontinuous number range Headquarters / Single Site Expect a mix of Communicator & PBX for coverage of all enterprise telephony features Most IW users can use Enterprise Voice exclusively Branch Office Gateways for Least Cost Routing & Local number termination WAN Survivability via Cell Phone & Internet

27. Deployment Factors to Consider Deployment Goal With Existing IP-PBX Mixed environment OCS for Voice Company Size 250 1000 5000 10,000 50,000 Current Stage No Voice Deployed Pilot Successful Initial Deployment Successful User Population Mobile & Remote Employee Headquarters Single Site Branch Office Deployment Scenario Overlay PBX Networked PBX Direct to PSTN Interop SIP/PSTN Gateway IP-PBX SIP Trunking Service

28. Recommendations no OCS voice yet – heading to pilot Start thinking about scale Architecture: HA, DR, Security, Management Validation & Testing of headsets, devices, etc. Build a solid infrastructure foundation Address any outstanding issues with these elements Anything with AD, DNS or Certificates will surface Telephony integration for rapid success Gateways maximize flexibility SIP Trunking maximizes environmental simplicity

29. Recommendations successful Pilot, heading to production Scale thinking pays off – now take the next step Look at traffic flows on LAN/WAN Managing usage as appropriate Costs of Least Cost Routing vs. PSTN / Carrier Respect the Users Deploy Monitoring End-user training resources Telephony integration for scale IP-PBXs: Direct SIP behind or alongside TDM PBXs: Direct to carrier

30. Moving to OCS Voice "I'm done with my PBX!" Deploy a gateway to the PSTN or SIP Trunking Give everyone OCS Voice Remove desk phones for those who don't need them - give others the choice Users on PBX can do personal call forwarding from Desk phone to OCS phone Turn off the PBX

31. What's next? Move your pilot forward to production Know that upgrading your IP-PBX is not the first step on the road to Unified Communications Experience the end-user capability anywhere! FREE Hosted Trial at https://r2.uctrial.comhttps://r2.uctrial.com Check out the administration experience! FREE OCS VMs at http://microsoft.com/VHDhttp://microsoft.com/VHD

32. Voice Resources Programs & Standards Unified Communications Open Interoperability Program Microsoft Office Protocol Documentation White Papers Integrating Telephony with Office Communications Server 2007 and 2007 R2 Microsoft Quality of Experience Documentation VoIP Architecture Configuring Voice Quality of Service

33. Call to Action Learn More! Related Content at TechEd on “Related Content” Slide Attend in-person or consume post-event at TechEd Online Check out online learning/training resources http://technet.microsoft.com/exchange/2010 http://technet.microsoft.com/office/ocs Try It Out! Download the Exchange Server 2010 Beta Evaluation http://www.microsoft.com/exchange/2010/try-it Get a 5-Day Trial of Office Communications Server 2007 R2 https://r2.uctrial.com/

34. www.microsoft.com/teched Sessions On-Demand & Community http://microsoft.com/technet Resources for IT Professionals http://microsoft.com/msdn Resources for Developers www.microsoft.com/learning Microsoft Certification and Training Resources www.microsoft.com/learning Microsoft Certification & Training Resources Resources

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36. © 2009 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.