Investor Presentaiton

Execution of Strategy Has Continued to Yield Results... Disciplined Capital Allocation Strategy Investments in fiber and IT solutions create platforms for long-term value Monetized CyrusOne and wireless assets - improved leverage profile from ~6x in 2013 to ~4x in 2017 Ability to fund fiber investments through cash flow ($ in mm) Strategic Revenue Growth Strategic Revenue CAGR: 18% $1,289 $1,162 $1,168 $1,185 $1,020 $1,043 312 306 264 236 219 236 272 313 367 414 495 448 $306 $359 $442 $537 $637 $705 2012 2013 2014 Strategic Revenue 2015 Legacy Revenue 2016 2017 Integration % of Total Revenue¹ 30% 34% 38% 46% 54% 55% Reorganizing to Facilitate Growth and Cost Management Completed internal reorganization leading to two distinct business units, with the appropriate scale, structure and leadership committed to driving their respective brands forward Reporting changes beginning 10'18 to improve investors' ability to appropriately value these services independently Transferring commercial CLEC operations out of E&C into IT services to consolidate VoIP operations, and highlight the strength of our growing UCaaS business IT Services & Hardware will report revenue by product practices: communications, cloud, consulting & infrastructure, demonstrating the breadth of our services Note: See appendix for reconciliation [1] Total revenue excluding CyrusOne, wireless, accounting adjustments recorded for reporting of discontinued operations and eliminations 19

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