Device Description Qualified IP PBXs and GatewaysUsed for direct connectivity to the PSTN via a PRI line Supported IP PBXsSupported: Legacy IP-PBXs internally tested with caveats Survivable Branch AppliancesLync Server with Gateway bundled for WAN branch survivability Session Border ControllersUsed for connectivity between Lync deployments and SIP trunk providers Reverse ProxiesRequired for external clients to access Lync web services running on user’s home pool Load BalancersUsed for load balancing http connections to Lync Web services NetworkingWired and Wi-Fi Network Infrastructure VDIThin Clients running in a VDI environment

FY13 FY14 No third party support while working on support case Enhancement: Providing partner training to PSS to Enhance Customer support Status: Delivered 4 depth partner trainings Minimal interaction with competing PBX vendors Enhancement: Leveraging strategic relationships with legacy PBX vendors to add additional supported PBXs Status: 2 legacy PBXs qualified Limited interaction with customer support Enhancement: Monitoring support issues and identifying gaps in test Status: 10 new tests added across programs No qualified Reverse ProxyEnhancement: Added qualification program for reverse proxies Status: 3 Reverse Proxies qualified

QualifiedDevicePartnerModel Feb 14, 2014GatewaySonusSBC 1000 Feb 14, 2014E-SBCSonusSBC 1000 Feb 6, 2014IP-PBXNECUG30 Feb 5, 2014IP-PBXAastraAastra 470 Dec, 10, 2013E-SBCOracleACME Net-Net OSVM Dec 3, 2013E-SBCSonusVX 1200 Dec 3, 2013GatewaySonusVX 1200 Nov 19, 2013Reverse ProxyF5Big IP LTM Nov 15, 2013GatewayAudiocodesM500 Nov 15, 2013GatewayAudiocodesM2000 Nov 15, 2013GatewayAudiocodesM3000 Nov 11, 2013IP-PBXAastraMX One Nov 8, 2013GatewayAudiocodesM800

FY 13FY14 Redundant / ambiguous test cases increased time to qualify Enhancement: Reduced Qualification time by removing 9% of the cases across the programs Bugs in automation tool slowed down qualification Enhancement:  Added15 bug fixes to reduce time to qualify  Maintained 84% automation  Improved documentation of known issues with workarounds

Existing PBX Existing Phone Handsets Numbering Plan to digit Internal extensions 9 for an outside line 3 digits + extension for other locations ….. Dialing Habits No premium Local, National International No premium Local, National Class of Service

Lync 2013 Existing PBX

23

Existing PBX Lync Server 2013

26

Lync Pool Site 01 Mediation Pool SBC sbc1.provider.com Site 02 Mediation Pool Trunk 1 Trunk 2 PSTN MPLS

Mediation Server C Gateway F Port APort BTrunk 1 Port C Port B Trunk 2 Port C Port E Trunk 3 Mediation Server D Gateway G 28 PSTN Gateway FQDN F PSTN Gateway FQDN G

Mediation Server IP-PBX Port APort A1Trunk 1 Port BPort B1Trunk 2 Port nPort n1Trunk n

PBX-10 PBX Extension MTP-2 MED-10 Trunk 1 MED-10 PBX-10 PBX-10 port: 5060 Signaling IP: PBX-1 Media IP: MTP-1 Trunk 2 MED-10 PBX-10 PBX-10 port: 5061 Signaling IP: PBX-1 Media IP: Media Bypass MTP-1 PSTN Gateway PBX-10 MTP

IP-PBX Gateway Mediation Server PBX User Front End Server Trunk Media Trunk PSTNMediation Server

IP-PBX Mediation Server Mediation Server PBX User Front-End Server Trunk Media

IP-PBX Gateway Mediation Server PBX User Front End Server Trunk Media Trunk PSTNMediation Server Inter-trunk routing: PSTN to PBX user call

Existing PBX Lync Server 2013 Existing PBX