1 Report Overview 1.1 Study Scope 1.2 Market Analysis by Type 1.2.1 Global SIP Based IP PBX Market Size Growth Rate by Type: 2017 VS 2021 VS 2028 1.2.2 Cloud-hosted 1.2.3 On-Site (Premise) 1.3 Market by Application 1.3.1 Global SIP Based IP PBX Market Share by Application: 2017 VS 2021 VS 2028 1.3.2 Small and Medium Sized Company 1.3.3 Large Company 1.4 Study Objectives 1.5 Years Considered 2 Global Growth Trends 2.1 Global SIP Based IP PBX Market Perspective (2017-2028) 2.2 SIP Based IP PBX Growth Trends by Region 2.2.1 SIP Based IP PBX Market Size by Region: 2017 VS 2021 VS 2028 2.2.2 SIP Based IP PBX Historic Market Size by Region (2017-2022) 2.2.3 SIP Based IP PBX Forecasted Market Size by Region (2023-2028) 2.3 SIP Based IP PBX Market Dynamics 2.3.1 SIP Based IP PBX Industry Trends 2.3.2 SIP Based IP PBX Market Drivers 2.3.3 SIP Based IP PBX Market Challenges 2.3.4 SIP Based IP PBX Market Restraints 3 Competition Landscape by Key Players 3.1 Global Top SIP Based IP PBX Players by Revenue 3.1.1 Global Top SIP Based IP PBX Players by Revenue (2017-2022) 3.1.2 Global SIP Based IP PBX Revenue Market Share by Players (2017-2022) 3.2 Global SIP Based IP PBX Market Share by Company Type (Tier 1, Tier 2, and Tier 3) 3.3 Players Covered: Ranking by SIP Based IP PBX Revenue 3.4 Global SIP Based IP PBX Market Concentration Ratio 3.4.1 Global SIP Based IP PBX Market Concentration Ratio (CR5 and HHI) 3.4.2 Global Top 10 and Top 5 Companies by SIP Based IP PBX Revenue in 2021 3.5 SIP Based IP PBX Key Players Head office and Area Served 3.6 Key Players SIP Based IP PBX Product Solution and Service 3.7 Date of Enter into SIP Based IP PBX Market 3.8 Mergers & Acquisitions, Expansion Plans 4 SIP Based IP PBX Breakdown Data by Type 4.1 Global SIP Based IP PBX Historic Market Size by Type (2017-2022) 4.2 Global SIP Based IP PBX Forecasted Market Size by Type (2023-2028) 5 SIP Based IP PBX Breakdown Data by Application 5.1 Global SIP Based IP PBX Historic Market Size by Application (2017-2022) 5.2 Global SIP Based IP PBX Forecasted Market Size by Application (2023-2028) 6 North America 6.1 North America SIP Based IP PBX Market Size (2017-2028) 6.2 North America SIP Based IP PBX Market Size by Country (2017-2022) 6.3 North America SIP Based IP PBX Market Size by Country (2023-2028) 6.4 United States 6.5 Canada 7 Europe 7.1 Europe SIP Based IP PBX Market Size (2017-2028) 7.2 Europe SIP Based IP PBX Market Size by Country (2017-2022) 7.3 Europe SIP Based IP PBX Market Size by Country (2023-2028) 7.4 Germany 7.5 France 7.6 U.K. 7.7 Italy 7.8 Russia 7.9 Nordic Countries 8 Asia-Pacific 8.1 Asia-Pacific SIP Based IP PBX Market Size (2017-2028) 8.2 Asia-Pacific SIP Based IP PBX Market Size by Country (2017-2022) 8.3 Asia-Pacific SIP Based IP PBX Market Size by Country (2023-2028) 8.4 China 8.5 Japan 8.6 South Korea 8.7 Southeast Asia 8.8 India 8.9 Australia 9 Latin America 9.1 Latin America SIP Based IP PBX Market Size (2017-2028) 9.2 Latin America SIP Based IP PBX Market Size by Country (2017-2022) 9.3 Latin America SIP Based IP PBX Market Size by Country (2023-2028) 9.4 Mexico 9.5 Brazil 10 Middle East & Africa 10.1 Middle East & Africa SIP Based IP PBX Market Size (2017-2028) 10.2 Middle East & Africa SIP Based IP PBX Market Size by Country (2017-2022) 10.3 Middle East & Africa SIP Based IP PBX Market Size by Country (2023-2028) 10.4 Turkey 10.5 Saudi Arabia 10.6 UAE 11 Key Players Profiles 11.1 NEC 11.1.1 NEC Company Detail 11.1.2 NEC Business Overview 11.1.3 NEC SIP Based IP PBX Introduction 11.1.4 NEC Revenue in SIP Based IP PBX Business (2017-2022) 11.1.5 NEC Recent Development 11.2 Microsoft 11.2.1 Microsoft Company Detail 11.2.2 Microsoft Business Overview 11.2.3 Microsoft SIP Based IP PBX Introduction 11.2.4 Microsoft Revenue in SIP Based IP PBX Business (2017-2022) 11.2.5 Microsoft Recent Development 11.3 Huawei 11.3.1 Huawei Company Detail 11.3.2 Huawei Business Overview 11.3.3 Huawei SIP Based IP PBX Introduction 11.3.4 Huawei Revenue in SIP Based IP PBX Business (2017-2022) 11.3.5 Huawei Recent Development 11.4 West Unified Communications 11.4.1 West Unified Communications Company Detail 11.4.2 West Unified Communications Business Overview 11.4.3 West Unified Communications SIP Based IP PBX Introduction 11.4.4 West Unified Communications Revenue in SIP Based IP PBX Business (2017-2022) 11.4.5 West Unified Communications Recent Development 11.5 Mitel 11.5.1 Mitel Company Detail 11.5.2 Mitel Business Overview 11.5.3 Mitel SIP Based IP PBX Introduction 11.5.4 Mitel Revenue in SIP Based IP PBX Business (2017-2022) 11.5.5 Mitel Recent Development 11.6 Vonage 11.6.1 Vonage Company Detail 11.6.2 Vonage Business Overview 11.6.3 Vonage SIP Based IP PBX Introduction 11.6.4 Vonage Revenue in SIP Based IP PBX Business (2017-2022) 11.6.5 Vonage Recent Development 11.7 Avaya 11.7.1 Avaya Company Detail 11.7.2 Avaya Business Overview 11.7.3 Avaya SIP Based IP PBX Introduction 11.7.4 Avaya Revenue in SIP Based IP PBX Business (2017-2022) 11.7.5 Avaya Recent Development 11.8 Cisco 11.8.1 Cisco Company Detail 11.8.2 Cisco Business Overview 11.8.3 Cisco SIP Based IP PBX Introduction 11.8.4 Cisco Revenue in SIP Based IP PBX Business (2017-2022) 11.8.5 Cisco Recent Development 11.9 BroadSoft 11.9.1 BroadSoft Company Detail 11.9.2 BroadSoft Business Overview 11.9.3 BroadSoft SIP Based IP PBX Introduction 11.9.4 BroadSoft Revenue in SIP Based IP PBX Business (2017-2022) 11.9.5 BroadSoft Recent Development 11.10 ShoreTel 11.10.1 ShoreTel Company Detail 11.10.2 ShoreTel Business Overview 11.10.3 ShoreTel SIP Based IP PBX Introduction 11.10.4 ShoreTel Revenue in SIP Based IP PBX Business (2017-2022) 11.10.5 ShoreTel Recent Development 11.11 8x8, Inc 11.11.1 8x8, Inc Company Detail 11.11.2 8x8, Inc Business Overview 11.11.3 8x8, Inc SIP Based IP PBX Introduction 11.11.4 8x8, Inc Revenue in SIP Based IP PBX Business (2017-2022) 11.11.5 8x8, Inc Recent Development 11.12 AT&T 11.12.1 AT&T Company Detail 11.12.2 AT&T Business Overview 11.12.3 AT&T SIP Based IP PBX Introduction 11.12.4 AT&T Revenue in SIP Based IP PBX Business (2017-2022) 11.12.5 AT&T Recent Development 11.13 Brekeke Software 11.13.1 Brekeke Software Company Detail 11.13.2 Brekeke Software Business Overview 11.13.3 Brekeke Software SIP Based IP PBX Introduction 11.13.4 Brekeke Software Revenue in SIP Based IP PBX Business (2017-2022) 11.13.5 Brekeke Software Recent Development 11.14 Avaya 11.14.1 Avaya Company Detail 11.14.2 Avaya Business Overview 11.14.3 Avaya SIP Based IP PBX Introduction 11.14.4 Avaya Revenue in SIP Based IP PBX Business (2017-2022) 11.14.5 Avaya Recent Development 11.15 Ciena (BluePlanet) 11.15.1 Ciena (BluePlanet) Company Detail 11.15.2 Ciena (BluePlanet) Business Overview 11.15.3 Ciena (BluePlanet) SIP Based IP PBX Introduction 11.15.4 Ciena (BluePlanet) Revenue in SIP Based IP PBX Business (2017-2022) 11.15.5 Ciena (BluePlanet) Recent Development 11.16 Ericsson 11.16.1 Ericsson Company Detail 11.16.2 Ericsson Business Overview 11.16.3 Ericsson SIP Based IP PBX Introduction 11.16.4 Ericsson Revenue in SIP Based IP PBX Business (2017-2022) 11.16.5 Ericsson Recent Development 11.17 Fonality 11.17.1 Fonality Company Detail 11.17.2 Fonality Business Overview 11.17.3 Fonality SIP Based IP PBX Introduction 11.17.4 Fonality Revenue in SIP Based IP PBX Business (2017-2022) 11.17.5 Fonality Recent Development 11.18 NetSapiens 11.18.1 NetSapiens Company Detail 11.18.2 NetSapiens Business Overview 11.18.3 NetSapiens SIP Based IP PBX Introduction 11.18.4 NetSapiens Revenue in SIP Based IP PBX Business (2017-2022) 11.18.5 NetSapiens Recent Development 11.19 RingCentral Next-Gen Competitor 11.19.1 RingCentral Next-Gen Competitor Company Detail 11.19.2 RingCentral Next-Gen Competitor Business Overview 11.19.3 RingCentral Next-Gen Competitor SIP Based IP PBX Introduction 11.19.4 RingCentral Next-Gen Competitor Revenue in SIP Based IP PBX Business (2017-2022) 11.19.5 RingCentral Next-Gen Competitor Recent Development 11.20 West Corporation 11.20.1 West Corporation Company Detail 11.20.2 West Corporation Business Overview 11.20.3 West Corporation SIP Based IP PBX Introduction 11.20.4 West Corporation Revenue in SIP Based IP PBX Business (2017-2022) 11.20.5 West Corporation Recent Development 11.21 ZyXEL 11.21.1 ZyXEL Company Detail 11.21.2 ZyXEL Business Overview 11.21.3 ZyXEL SIP Based IP PBX Introduction 11.21.4 ZyXEL Revenue in SIP Based IP PBX Business (2017-2022) 11.21.5 ZyXEL Recent Development 12 Analyst's Viewpoints/Conclusions 13 Appendix 13.1 Research Methodology 13.1.1 Methodology/Research Approach 13.1.2 Data Source 13.2 Disclaimer 13.3 Author Details

List of Tables Table 1. Global SIP Based IP PBX Market Size Growth Rate by Type (US$ Million): 2017 VS 2021 VS 2028 Table 2. Key Players of Cloud-hosted Table 3. Key Players of On-Site (Premise) Table 4. Global SIP Based IP PBX Market Size Growth by Application (US$ Million): 2017 VS 2021 VS 2028 Table 5. Global SIP Based IP PBX Market Size by Region (US$ Million): 2017 VS 2021 VS 2028 Table 6. Global SIP Based IP PBX Market Size by Region (2017-2022) & (US$ Million) Table 7. Global SIP Based IP PBX Market Share by Region (2017-2022) Table 8. Global SIP Based IP PBX Forecasted Market Size by Region (2023-2028) & (US$ Million) Table 9. Global SIP Based IP PBX Market Share by Region (2023-2028) Table 10. SIP Based IP PBX Market Trends Table 11. SIP Based IP PBX Market Drivers Table 12. SIP Based IP PBX Market Challenges Table 13. SIP Based IP PBX Market Restraints Table 14. Global SIP Based IP PBX Revenue by Players (2017-2022) & (US$ Million) Table 15. Global SIP Based IP PBX Market Share by Players (2017-2022) Table 16. Global Top SIP Based IP PBX Players by Company Type (Tier 1, Tier 2, and Tier 3) & (based on the Revenue in SIP Based IP PBX as of 2021) Table 17. Ranking of Global Top SIP Based IP PBX Companies by Revenue (US$ Million) in 2021 Table 18. Global 5 Largest Players Market Share by SIP Based IP PBX Revenue (CR5 and HHI) & (2017-2022) Table 19. Key Players Headquarters and Area Served Table 20. Key Players SIP Based IP PBX Product Solution and Service Table 21. Date of Enter into SIP Based IP PBX Market Table 22. Mergers & Acquisitions, Expansion Plans Table 23. Global SIP Based IP PBX Market Size by Type (2017-2022) & (US$ Million) Table 24. Global SIP Based IP PBX Revenue Market Share by Type (2017-2022) Table 25. Global SIP Based IP PBX Forecasted Market Size by Type (2023-2028) & (US$ Million) Table 26. Global SIP Based IP PBX Revenue Market Share by Type (2023-2028) Table 27. Global SIP Based IP PBX Market Size by Application (2017-2022) & (US$ Million) Table 28. Global SIP Based IP PBX Revenue Market Share by Application (2017-2022) Table 29. Global SIP Based IP PBX Forecasted Market Size by Application (2023-2028) & (US$ Million) Table 30. Global SIP Based IP PBX Revenue Market Share by Application (2023-2028) Table 31. North America SIP Based IP PBX Market Size by Country (2017-2022) & (US$ Million) Table 32. North America SIP Based IP PBX Market Size by Country (2023-2028) & (US$ Million) Table 33. Europe SIP Based IP PBX Market Size by Country (2017-2022) & (US$ Million) Table 34. Europe SIP Based IP PBX Market Size by Country (2023-2028) & (US$ Million) Table 35. Asia-Pacific SIP Based IP PBX Market Size by Region (2017-2022) & (US$ Million) Table 36. Asia-Pacific SIP Based IP PBX Market Size by Region (2023-2028) & (US$ Million) Table 37. Latin America SIP Based IP PBX Market Size by Country (2017-2022) & (US$ Million) Table 38. Latin America SIP Based IP PBX Market Size by Country (2023-2028) & (US$ Million) Table 39. Middle East & Africa SIP Based IP PBX Market Size by Country (2017-2022) & (US$ Million) Table 40. Middle East & Africa SIP Based IP PBX Market Size by Country (2023-2028) & (US$ Million) Table 41. NEC Company Detail Table 42. NEC Business Overview Table 43. NEC SIP Based IP PBX Product Table 44. NEC Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 45. NEC Recent Development Table 46. Microsoft Company Detail Table 47. Microsoft Business Overview Table 48. Microsoft SIP Based IP PBX Product Table 49. Microsoft Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 50. Microsoft Recent Development Table 51. Huawei Company Detail Table 52. Huawei Business Overview Table 53. Huawei SIP Based IP PBX Product Table 54. Huawei Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 55. Huawei Recent Development Table 56. West Unified Communications Company Detail Table 57. West Unified Communications Business Overview Table 58. West Unified Communications SIP Based IP PBX Product Table 59. West Unified Communications Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 60. West Unified Communications Recent Development Table 61. Mitel Company Detail Table 62. Mitel Business Overview Table 63. Mitel SIP Based IP PBX Product Table 64. Mitel Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 65. Mitel Recent Development Table 66. Vonage Company Detail Table 67. Vonage Business Overview Table 68. Vonage SIP Based IP PBX Product Table 69. Vonage Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 70. Vonage Recent Development Table 71. Avaya Company Detail Table 72. Avaya Business Overview Table 73. Avaya SIP Based IP PBX Product Table 74. Avaya Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 75. Avaya Recent Development Table 76. Cisco Company Detail Table 77. Cisco Business Overview Table 78. Cisco SIP Based IP PBX Product Table 79. Cisco Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 80. Cisco Recent Development Table 81. BroadSoft Company Detail Table 82. BroadSoft Business Overview Table 83. BroadSoft SIP Based IP PBX Product Table 84. BroadSoft Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 85. BroadSoft Recent Development Table 86. ShoreTel Company Detail Table 87. ShoreTel Business Overview Table 88. ShoreTel SIP Based IP PBX Product Table 89. ShoreTel Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 90. ShoreTel Recent Development Table 91. 8x8, Inc Company Detail Table 92. 8x8, Inc Business Overview Table 93. 8x8, Inc SIP Based IP PBXProduct Table 94. 8x8, Inc Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 95. 8x8, Inc Recent Development Table 96. AT&T Company Detail Table 97. AT&T Business Overview Table 98. AT&T SIP Based IP PBXProduct Table 99. AT&T Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 100. AT&T Recent Development Table 101. Brekeke Software Company Detail Table 102. Brekeke Software Business Overview Table 103. Brekeke Software SIP Based IP PBXProduct Table 104. Brekeke Software Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 105. Brekeke Software Recent Development Table 106. Avaya Company Detail Table 107. Avaya Business Overview Table 108. Avaya SIP Based IP PBXProduct Table 109. Avaya Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 110. Avaya Recent Development Table 111. Ciena (BluePlanet) Company Detail Table 112. Ciena (BluePlanet) Business Overview Table 113. Ciena (BluePlanet) SIP Based IP PBXProduct Table 114. Ciena (BluePlanet) Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 115. Ciena (BluePlanet) Recent Development Table 116. Ericsson Company Detail Table 117. Ericsson Business Overview Table 118. Ericsson SIP Based IP PBXProduct Table 119. Ericsson Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 120. Ericsson Recent Development Table 121. Fonality Company Detail Table 122. Fonality Business Overview Table 123. Fonality SIP Based IP PBXProduct Table 124. Fonality Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 125. Fonality Recent Development Table 126. NetSapiens Company Detail Table 127. NetSapiens Business Overview Table 128. NetSapiens SIP Based IP PBXProduct Table 129. NetSapiens Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 130. NetSapiens Recent Development Table 131. RingCentral Next-Gen Competitor Company Detail Table 132. RingCentral Next-Gen Competitor Business Overview Table 133. RingCentral Next-Gen Competitor SIP Based IP PBXProduct Table 134. RingCentral Next-Gen Competitor Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 135. RingCentral Next-Gen Competitor Recent Development Table 136. West Corporation Company Detail Table 137. West Corporation Business Overview Table 138. West Corporation SIP Based IP PBXProduct Table 139. West Corporation Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 140. West Corporation Recent Development Table 141. ZyXEL Company Detail Table 142. ZyXEL Business Overview Table 143. ZyXEL SIP Based IP PBXProduct Table 144. ZyXEL Revenue in SIP Based IP PBX Business (2017-2022) & (US$ Million) Table 145. ZyXEL Recent Development Table 146. Research Programs/Design for This Report Table 147. Key Data Information from Secondary Sources Table 148. Key Data Information from Primary Sources List of Figures Figure 1. Global SIP Based IP PBX Market Share by Type: 2021 VS 2028 Figure 2. Cloud-hosted Features Figure 3. On-Site (Premise) Features Figure 4. Global SIP Based IP PBX Market Share by Application in 2021 & 2028 Figure 5. Small and Medium Sized Company Case Studies Figure 6. Large Company Case Studies Figure 7. SIP Based IP PBX Report Years Considered Figure 8. Global SIP Based IP PBX Market Size (US$ Million), Year-over-Year: 2017-2028 Figure 9. Global SIP Based IP PBX Market Size, (US$ Million), 2017 VS 2021 VS 2028 Figure 10. Global SIP Based IP PBX Market Share by Region: 2021 VS 2028 Figure 11. Global SIP Based IP PBX Market Share by Players in 2021 Figure 12. Global Top SIP Based IP PBX Players by Company Type (Tier 1, Tier 2, and Tier 3) & (based on the Revenue in SIP Based IP PBX as of 2021) Figure 13. The Top 10 and 5 Players Market Share by SIP Based IP PBX Revenue in 2021 Figure 14. North America SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 15. North America SIP Based IP PBX Market Share by Country (2017-2028) Figure 16. United States SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 17. Canada SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 18. Europe SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 19. Europe SIP Based IP PBX Market Share by Country (2017-2028) Figure 20. Germany SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 21. France SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 22. U.K. SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 23. Italy SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 24. Russia SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 25. Nordic Countries SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 26. Asia-Pacific SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 27. Asia-Pacific SIP Based IP PBX Market Share by Region (2017-2028) Figure 28. China SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 29. Japan SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 30. South Korea SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 31. Southeast Asia SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 32. India SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 33. Australia SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 34. Latin America SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 35. Latin America SIP Based IP PBX Market Share by Country (2017-2028) Figure 36. Mexico SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 37. Brazil SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 38. Middle East & Africa SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 39. Middle East & Africa SIP Based IP PBX Market Share by Country (2017-2028) Figure 40. Turkey SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 41. Saudi Arabia SIP Based IP PBX Market Size YoY Growth (2017-2028) & (US$ Million) Figure 42. NEC Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 43. Microsoft Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 44. Huawei Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 45. West Unified Communications Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 46. Mitel Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 47. Vonage Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 48. Avaya Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 49. Cisco Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 50. BroadSoft Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 51. ShoreTel Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 52. 8x8, Inc Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 53. AT&T Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 54. Brekeke Software Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 55. Avaya Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 56. Ciena (BluePlanet) Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 57. Ericsson Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 58. Fonality Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 59. NetSapiens Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 60. RingCentral Next-Gen Competitor Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 61. West Corporation Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 62. ZyXEL Revenue Growth Rate in SIP Based IP PBX Business (2017-2022) Figure 63. Bottom-up and Top-down Approaches for This Report Figure 64. Data Triangulation Figure 65. Key Executives Interviewed

NEC Microsoft Huawei West Unified Communications Mitel Vonage Avaya Cisco BroadSoft ShoreTel 8x8, Inc AT&T Brekeke Software Avaya Ciena (BluePlanet) Ericsson Fonality NetSapiens RingCentral Next-Gen Competitor West Corporation ZyXEL