Table of Contents SIP Based IP PBX Executive Summary 14 SIP Based IP PBX Market Driving Forces 14 A Digital Transformation, An Approach That Enables Organizations To Drive Changes In Their Business Models And Ecosystems 15 SIP PBX Market Shares 17 SIP PBX Forecast 19 1. SIP Based IP PBX: Market Description And Market Dynamics 21 1.1 Software Based IP PBX 21 1.1.1 Session Initiation Protocol (SIP) Trunking 22 1.1.2 SIP Trunking Works: Over an Existing IP Network 23 1.1.3 SIP Trunking Alternative Solutions: 25 1.2 SIP-PBX Deployment 32 1.2.1 Telephone First Point Of Contact 33 1.2.2 SIP Application Server 34 1.3 Convergence of Voice and Data 37 1.4 Enterprise PBX 38 1.5 Session Initiation Protocol (SIP) Standard 39 1.5.1 SIP Advantages and Applications 40 1.5.2 SIP Part of IP Suite 40 1.5.3 Session Initiation Protocol 41 1.5.4 SIP Mobility and Presence Support 41 1.6 SIP Application Server 42 1.6.1 Session Initiation Protocol (SIP) Trunking 43 1.6.2 SIP Trunking: 43 1.6.3 Advantages of SIP Trunking Services: 44 2. SIP Based IP PBX Market Shares And Market Forecasts 45 2.1 SIP Based IP PBX Market Driving Forces 45 2.1.1 A Digital Transformation, An Approach That Enables Organizations To Drive Changes In Their Business Models And Ecosystems 46 2.2 SIP PBX Market Shares 48 2.2.1 8x8 53 2.2.2 Microsoft 53 2.2.3 NEC 53 2.2.4 NEC 54 2.2.5 SIP Cloud Delivery Architectures Market Share 57 2.2.6 Mitel 58 2.2.7 Cisco Tops PBX Market, Microsoft Leads In UC 59 2.2.8 Cloud PBX Market Shares 60 2.2.9 RingCentral 60 2.2.10 West Corporation 61 2.2.11 Huawei 62 2.2.12 Broadsoft 63 2.3 SIP PBX Forecast 63 2.3.1 Digital Private Branch Exchange (PBX) At the End of Its Life Cycle 65 2.3.2 SIP Based IP PBX Cloud and Unified Communications 68 2.3.3 SIP Enabled IP PBX SMB Market Shares Dollars, Worldwide, 2016 70 2.3.4 SIP Enabled IP PBX Enterprise Market Shares Dollars, Worldwide, 2016 71 2.3.5 SIP Enabled IP PBX Cloud SMB Market Shares Dollars, Worldwide, 2016 72 2.3.6 SIP Enabled IP PBX Cloud Enterprise / Service Provider Market Shares Dollars, Worldwide, 2016 73 2.3.7 SIP Enabled IP PBX Unified Communications Market Shares Dollars, Worldwide, 2016 74 2.4 SIP Based IP PBX Pricing 75 2.5 SIP Based IP PBX Regional Analysis 77 3. SIP Based IP PBX Product Description 79 3.1 Avaya 79 3.1.1 Avaya Networking 79 3.1.2 Avaya Cloud Options 80 3.1.3 Avaya Communication Server 1000 81 3.1.4 Avaya Professional-Grade Business Communications 82 3.2 BT / Avaya IP PBX Cloud 83 3.3 Equinix / Avaya Cloud SIP Communications 83 3.4 Cisco 84 3.4.1 Cisco Existing Collaboration 84 3.4.2 Apple and Cisco Working Together on IP Communication 86 3.5 AT&T 87 3.5.1 Cisco Hosted Collaboration Solution from AT&T 88 3.5.1 Cisco Hosted Collaboration Solution from AT&T Hybrid and Existing Voice Services 89 3.6 NEC 94 3.6.1 NEC IP-PBX 94 3.6.2 NEC IP-PBX 96 3.6.3 NEC Univerge SV9500 97 3.7 Mitel 97 3.7.1 Mitel Phone System Offers Flexibility 98 3.7.2 Mitel VoIP 99 3.7.3 Mitel Cloud Solution 101 3.7.4 Mitel Hybrid Solution 101 3.7.5 Mitel Presence 103 3.8 Microsoft SfBS Premises-Based Version of Skype 104 3.9 RingCentral Phone System In The Cloud 105 3.10 8x8 Global Cloud Communications 106 3.10.1 8x8 Virtual Office Pre-Built CRM Integrations with Salesforce, NetSuite, and Zendesk 107 3.11 Ericsson Multimedia Telephony Application Server 108 3.11.1 Ericsson Consumer and Enterprise Communication Services Offering 109 4. SIP Based IP PBX Research And Technology 112 4.1 NFV 112 4.1.1 NFV – Network Functions Virtualization - Cisco 113 4.2 Scale: Cloud 2.0 Mega Data Center Containers 113 4.2.1 Data Center Architectures Evolving 114 5. SIP Based IP PBX Company Profiles 115 5.1 8x8 115 5.2 AT&T 116 5.3 Avaya 116 5.3.1 Avaya Team Engagement Solutions 117 5.3.2 Avaya Customer Engagement Solutions 118 5.3.3 Avaya Fabric Networking 121 5.3.4 Avaya Services 121 5.3.5 Avaya Files for Chapter 11 Bankruptcy 122 5.3.6 Avaya Revenue 124 5.4 Brekeke Software 128 5.5 Broadsoft 129 5.6 BT / Avaya IP PBX Cloud 130 5.7 Ciena / BluePlanet 130 5.7.1 Ciena Opensource And Standards Affiliations 131 5.7.2 Ciena Open Network Operating System (Onos) 131 5.7.3 Ciena Metro Ethernet Forum 132 5.7.4 Ciena Open Compute Project 132 5.7.5 Ciena OpenDaylight 133 5.7.6 Ciena Open Networking Foundation 133 5.7.7 Ciena Internet Engineering Task Force 133 5.7.8 Ciena European Telecommunications Standards Institute 134 5.7.9 Centurylink And Blue Planet: Orchestration Of NFV-Based Services With NG-OSS 136 5.7.10 Telefónica, Blue Planet, Brocade, Intel, And Red Hat: Orchestrating Vrouter Vnf With Deterministic Performance 137 5.7.11 Centurylink, Blue Planet 139 5.7.12 Ciena Blue Planet SDN and NFV Orchestration Platforms For Network Operators 139 5.7.13 Ciena Blue Planet Container-Based Micro-Services Architecture 140 5.7.14 Ciena Blue Planet Container Based Architecture 141 5.8 Cisco Systems 143 5.8.1 Cisco Business 143 5.8.2 Cisco Strategy and Focus Areas 144 5.8.3 Cisco Leverages Market Transitions 146 5.8.4 Cisco Addresses Digital Transformation 147 5.8.5 Cisco Software-Defined Networking 149 5.8.6 Cisco Cloud Strategy 150 5.8.7 Cisco Switching 150 5.8.8 Cisco Spark 153 5.8.9 Cisco Data Center 153 5.8.10 Cisco UCS Mini Edge Of The Network Soolution 155 5.8.11 Cisco Competition 156 5.8.12 Cisco Revenue 158 5.9 Equinix / Avaya Cloud SIP Communications 160 5.10 Ericsson 161 5.10.1 Ericsson Revenue 161 5.11 Fonality 162 5.12 Huawei 164 5.12.1 Huawei 2016 Business 164 5.12.2 Huawei Smart Devices 165 5.12.3 Huawei Regional Strengths 166 5.12.4 Huawei Building Cloud Ecosystem 167 5.12.5 Huawei Adopting a Product + Service Strategy 168 5.12.6 Huawei Vision & Mission 169 5.12.7 Huawei Strategy 169 5.12.8 Huawei Financial Highlights 170 5.12.9 Huawei Corporate Governance 170 5.12.10 Huawei Research & Development 170 5.12.11 Huawei Cyber Security 170 5.12.12 Huawei Milestones 170 5.12.13 Huawei Annual Report 171 5.12.14 Huawei Partners with China Telecom, Shenzhen Gas On Smart Utility 171 5.13 Microsoft 172 5.13.1 Microsoft / Mojang AB Minecraft 172 5.13.2 Microsoft Reportable Segments 172 5.13.3 Microsoft Revenue by Segment 175 5.13.4 Skype and Microsoft 177 5.13.5 Microsoft / Skype / GroupMe Free Group Messaging 178 5.13.6 Microsoft SOA 179 5.13.7 Microsoft .Net Open Source 181 5.14 Mitel 181 5.14.1 Mitel Business Communication Experts 182 5.14.2 Mitel Empowering Partners 182 5.14.3 Mitel Signs Definitive Agreement to Divest Mobile Business 183 5.14.4 Mitel Reports September Quarter Results 184 5.14.5 Mitel Cloud and Revenue 185 5.14.6 Mitel Enhances Reliability of Cloud-Based Business Communications and Collaboration Services 186 5.14.7 Mitel Reduced IT Maintenance 187 5.14.8 Mitel Cloud Technology 190 5.14.9 Mitel’s Approach To Developing 5G Technologies 190 5.15 NEC 191 5.15.1 NEC Communication Platforms 192 5.15.2 NEC Software-Based Communication Platforms 192 5.15.3 NEC Software and Hardware Based: UNIVERGE® SV9000 193 5.15.4 NEC Small to Medium-Sized Businesses Communication Platforms 194 5.15.5 NEC Large Enterprise Communication Platforms 194 5.16 NetSapiens 195 5.17 RingCentral Next-Gen Competitor 195 5.18 Shoretel 196 5.19 Vonage 197 5.20 West Corporation 198 5.20.1 West Services 199 5.20.2 West Corporation Revenue 200 5.21 ZyXEL 201 5.22 List of Companies 216 Wintergreen Research, 223 WinterGreen Research Research Methodology 224

List of Figures Figure 1. SIP Enabled IP PBX Server, Cloud, and Unified Communications Market Shares Revenue, Dollars, 2016 18 Figure 2. SIP Enabled IP PBX Market Forecasts Dollars, Worldwide, 2016 20 Figure 3. SIP Application Server Business Benefits 26 Figure 4. SIP Server-Based Applications 28 Figure 5. SIP Server-Based Benefits 29 Figure 6. SIP Enabled IP PBX Server, Cloud, and Unified Communications Market Shares Revenue, Dollars, 2016 49 Figure 7. SIP Enabled IP PBX Server, Cloud, and Unified Communications Market Shares Revenue, Dollars, 2016 50 Figure 8. Selected Enterprise Communications Systems Participants 51 Figure 9. SIP Enabled IP PBX Market Shares, Segments SIP PBX SMB, SIP PBX Enterprise, SIP PBX Cloud SMB, SIP Cloud Enterprise / Service Provider, SIP Unified Communications, Dollars, Worldwide, 2016 52 Figure 10. NEC Univerge SIP IP PBX 54 Figure 11. NEC UNIVERGE SV9100 Features: 55 Figure 12. NEC UNIVERGE SV9100 Functions: 56 Figure 13. SIP Enabled IP PBX Market Forecasts Dollars, Worldwide, 2016 64 Figure 14. SIP Enabled IP PBX Market Forecasts Dollars, Worldwide, 2016 65 Figure 15. SIP Enabled IP PBX SMB Market Shares Dollars, Worldwide, 2016 70 Figure 16. SIP Enabled IP PBX Enterprise Market Shares Dollars, Worldwide, 2016 71 Figure 17. SIP Enabled IP PBX Cloud SMB Market Shares Dollars, Worldwide, 2016 72 Figure 18. SIP Enabled IP PBX Cloud Enterprise / Service Provider Market Shares Dollars, Worldwide, 2016 73 Figure 19. SIP Enabled IP PBX Unified Communications Market Shares Dollars, Worldwide, 2016 74 Figure 20. Avaya Networking Technology Driving Digital Transformation 80 Figure 21. Avaya Cloud Options 80 Figure 22. Avaya Communication Server 1000 Functions 82 Figure 23. Avaya Cloud Options 83 Figure 24. Avaya Cloud Options 83 Figure 25. Cisco Spark Plus App Features 85 Figure 26. Cisco Spark Board: A 3-in-1 Team Collaboration Device for Meeting Rooms 86 Figure 27. Cisco Hosted Collaboration Solution from AT&T Features 89 Figure 28. Cisco Hosted Collaboration Solution from AT&T Functions 90 Figure 29. Cisco Hosted Collaboration Solution from AT&T Functions 92 Figure 30. AT&T Cisco Unified SIP Collaboration System Features 93 Figure 31. NEC IP-PBX 94 Figure 32. NEC UNIVERGE SV9100 Features: 95 Figure 33. NEC SL1000 IP PBX 96 Figure 34. Microsoft Partners Affected by Pivot from SfBS (On-Premises) to SfBO 105 Figure 35. 8x8 Virtual Office Functions 106 Figure 36. Ericsson Multimedia Telephony Application Server Main Values 110 Figure 37. 8x8 Cloud-Based Phone Systems and Contact Center Functions: 115 Figure 38. 8x8 Customers 116 Figure 39. Avaya SIP PBX Solution Deployment Models 117 Figure 40. Avaya Transaction Solutions Functions 119 Figure 41. Avaya Telecommunications Leadership Position Metrics 120 Figure 42. Avaya Applications on Platform 123 Figure 43. Avaya Target Markets Businesses by Size 127 Figure 44. Figure 22. Avaya Target Markets Businesses by Industry 127 Figure 45. Avaya Cloud Options 130 Figure 46. Ciena OSS from BluePlanet 135 Figure 47. Benefits of Blue Planet's Container-Based Micro-Service Architecture 141 Figure 48. Ciena Blue Planet Component Micro Services: SDN, NFV, and Multi Domain 142 Figure 49. Cisco Technology Foundation For Digital Transformation 148 Figure 50. Cisco Unified Computing System Portfolio Of Solutions Functions 154 Figure 51. Avaya Cloud Options 160 Figure 52. Fonality Flexibility of Hosted 162 Figure 53. Fonality Benefits of Premise 163 Figure 54. Microsoft Intelligent Cloud Segment 174 Figure 55. Microsoft / Skype / GroupMe Free Group Messaging 178 Figure 56. Microsoft Service Orientated Architecture SOA Functions 179 Figure 57. NEC Global Sales by Segment 191 Figure 58. ShoreTel Target Markets 196 Figure 59. West Corporation Revenue by Segment 200 Figure 60. ZyXEL SIP IP PBX Functions 201 Figure 61. ZyXEL Enterprise-Grade SIP IP PBX System for Small and Medium Businesses Specifications, System Specifications, Standard Protocols 203